Flashlights are used for different purposes: in everyday life, construction, travel. Their main characteristics are impact resistance, moisture resistance, luminous range and directivity of the light beam.
LED flashlights are easy to turn on and carry by hand. They shine quite brightly, have high power. The case is made of plastic or metal.
Plastic flashlights are light, metal ones are not afraid of moisture, dust and shock. Models are equipped with a wrist strap, they can focus the rays, lengthening or bringing them closer.
Working principle of LED lamp:
- The LED consists of semiconductors that convert the incoming current into light radiation. The current is directed only from the anode to the cathode, a p-n junction is created.
Electrons meet holes and lose their energy, from which photons are formed. It is necessary that several semiconductors with different types of conductivity interact with each other.
- A hole is a place in the crystal lattice, after exposure to which electrons move from the upper atomic shells, and a positive charge is formed.
Electrons move towards a positive charge, and holes move towards a negative one. The free space between them is filled with electrons.
- Electrons and holes through diffusion penetrate through the layer formed in the semiconductor between areas of different conductivity. This is necessary for the concentration of the same number of electrons and holes on both sides of the layer.
In this case, the stress on the intermediate layer increases. After the recombination of holes and electrons, the barrier in the p-n junction decreases, and light energy is released.
Types of lanterns
- Manual full size flashlights are used in cases where high power of the device is important for a long time, and its dimensions do not matter. Models are designed for constant holding in hands, easy to transport.
- Handheld compact lights are used to light the way or look for small objects in the dark. These devices will come in handy in unexpected situations, so they must be portable and convenient for everyday wear.
- Lanterns on the forehead allow you to work with your hands in places with poor lighting. Lighting range - up to 30 meters. Often such devices are equipped with the function of selecting the best mode in a certain place at a certain time.
Headlamps are used by hunters, tourists, motorists, cyclists, builders, doctors.
- Tourist lanterns- resistant to mechanical stress, moisture resistant, practical and compact devices. Both batteries and accumulators are used as a power source for most models.
- Dynamo lights– portable devices that work without batteries; to put the mechanism into action, you should rotate the charging handle for some time.
Such a device does not pollute the environment, it can be used to recharge the phone.
- diving lights have high water resistance, the function of changing the color rendering of the luminous flux. They have a high brightness of light, allow you to illuminate objects that are located at long distances.
Most models are equipped with a mode switching function.
- Laser lights- devices that are structurally close to search engines, equipped with a rugged housing. As a rule, such models operate at low temperatures, have a sealed and reliable metal alloy case.
Among the advantages of such devices: small dimensions, impact resistance, several batteries in the kit, the presence of a remote control panel.
- Keychains- compact devices that are worn in a keychain. Used to perform simple tasks, their functionality and brightness are lower than those of hand-held devices.
- Flashlights-shockers- not only a personal lamp, but also an effective means of self-defense. They painfully shock even through thick down jackets.
They are characterized by durability, stable metal case, which is not subject to mechanical damage. The prices for these devices are high.
- - devices used in conjunction with weapon mounts. The main function is to illuminate the target in low light. Lighting range - within 50 meters.
Among the technical characteristics are a narrow glow angle, small dimensions and power of the device. The metal housing of the instruments provides thorough water protection. Additional features: remote control, mode switching.
- - devices used for carrying in hands, with high brightness and glow range. The devices have a large battery compartment. Lighting range - up to 250 meters.
Equipped with the function of changing the angle of illumination, switching modes, with an average power. The metal case is durable and waterproof.
By type of food are distinguished:
- Flashlights that run on batteries. Recharged from the mains, the power source is a nickel-cadmium, nickel-metal hydride, lead-acid or lithium-ion battery.
- Battery powered flashlights. Such devices are lighter, do not require recharging the device.
Lantern characteristics
Among the characteristics of flashlights stand out:
- dimensions;
- brightness of the light flux;
- light source power (LED models);
- working hours;
- number of operating modes;
- resistance to external influences (moisture, frost resistance);
- digital current stabilization;
- availability of additional accessories.
Light flow(brightness of the LED flashlight) - a value that is measured in lumens.
Uniform diffused illumination with low brightness can be obtained in an LED flashlight with the same number of lumens, long-range flashlights provide narrow and bright beams.
The lighting range of flashlights is from 60 to 150 meters. Portable models can illuminate the space at a distance of 15 meters.
LED models:
- conventional DIP LEDs,
- SMD LEDs,
- COB technologies,
- projector LEDs,
- RGB LEDs,
- LED strips.
DIP LEDs consist of two metal legs, a clear plastic case with a small lens inside; the structures are easy to install and use, provide good protection from environmental influences, and practically do not radiate heat.
SMD LEDs are flat, without legs, their current is supplied to the terminals that are located on the reverse side of the LED; have good indicators of brightness and light output.
COB LEDs provide fast light diffusion, spotlight LEDs are high power devices.
RGB-LEDs are equipped with a glow color control function. The LED strip has high brightness and energy efficiency.
The maximum operating time of the flashlight indicated as an average value and depends on the mode of operation and battery capacity. This time can be calculated in minutes, hours and days.
Flashlight body material:
- aluminum,
- plastic,
- polymer.
Housings of aluminum fixtures are strong enough, have a cylindrical shape. Powder coating protects the metal from corrosion. Anodized lamps are not exposed to mechanical damage.
There are many polymer and plastic varieties of cases. Polymeric materials are elastic, not afraid of shock.
Lantern length, as a rule, does not exceed 84 cm. This indicator depends on the functionality of the device. Compact handheld models up to 15.5 cm long are used for domestic needs.
The weight of the lanterns is from 100 grams to 1 kilogram.
The kit may include:
- flashlight;
- spare sealing rings;
- lanyard;
- company card for the model;
- case;
- factory packaging;
- Charger;
- warranty card;
- user guide.
Accessories used include:
- cases for accumulators;
- fixtures for lanterns;
- silicone grease for rubber surfaces;
- diffusing caps, red filters for illumination;
- additional buildings;
- metal clips for fastening;
- hand straps;
- overlay on the button in the tail of the lantern.
Features of hand lamps:
- high power devices;
- are easily transported;
- used in construction and at home;
- portable and convenient for daily wear.
- good lighting range;
- allow you to work in places with low light;
- wide scope of use.
Features of tourist lamps:
- moisture resistance;
- resistance to mechanical stress;
- practical and mobile devices.
Features of dynamo lights:
- portability and compactness;
- run on batteries;
- do not pollute the environment.
- good level of water resistance;
- high level of light brightness;
Features of laser lights:
- have a solid body;
- work in low temperature conditions;
- have small dimensions;
- have high impact resistance.
- compact devices;
- used to perform simple tasks;
- low technical characteristics.
Features of flashlights-shockers:
- effective means of self-defense;
- have a durable metal case;
- are not exposed to mechanical damage;
- such devices are expensive.
- illuminate the target in low light;
- used in conjunction with a weapon mount;
- have a high illumination range;
- small dimensions.
Features of search lights:
- have a high brightness of the glow;
- have a good range of illumination;
- with remote control function;
- equipped with a mode switch function.
Advantages of types of lanterns
Pros of flashlights:
- convenient and compact;
- suitable for individual use;
- easy to transport;
- have high power.
Benefits of headlamps:
- convenient and practical;
- allow you to free your hands;
- you can choose the appropriate mode of operation;
- wide range of uses.
- equipped with a mode switching function;
- resistance to mechanical stress;
- moisture resistant;
- practical and compact devices;
- have a high radiation intensity.
Advantages of dynamo flashlights:
- work without batteries;
- do not pollute the environment;
- used in places with no natural light.
Advantages of diving lights:
- high impermeability;
- function of changing the color rendering of the light flux;
- good illumination at long distances.
Advantages of laser lamps:
- equipped with a solid structure;
- frost-resistant models;
- small dimensions;
- high impact resistance.
- compact and easy to use devices;
- lungs.
- used for self-defense;
- have a solid body;
- not subject to mechanical damage.
Advantages of tactical flashlights:
- target illumination in low light;
- high range of illumination;
- good power devices;
- remote control function.
Pros of search lights:
- high brightness;
- good range of illumination;
- the presence of the function of changing the angle of illumination;
- switching modes.
Cons types of lanterns
Cons of hand-held full-size fixtures:
- heavy and weighty;
- Designed to be held permanently.
Disadvantages of handheld flashlights:
- not suitable for stationary use;
- Designed for constant holding in the hands;
- technical characteristics are low.
- unidirectional light flow;
- slipping of the flashlight with a loose mount.
Disadvantages of flashlights-shockers:
- high price;
- hefty construction.
- low technical characteristics;
- poor color rendering and low light intensity.
Disadvantages of laser lights:
- heavy structures;
- high price.
- low technical characteristics;
- illuminate a small area;
- they are easy to lose.
Disadvantages of tactical flashlights:
- high price;
- light is directed to one target.
- large dimensions;
- heavy structures.
How to choose a flashlight
- First you need to decide on the purpose of the lamp. If you need a flashlight for home or summer cottage, a flashlight with D-format alkaline batteries will suffice. For hiking, choose LED lamps.
- Depending on what you need a lantern for, we determine the required size of the luminaire. Hand-held pocket appliances that will be used in everyday life should be light and compact so that they are easy and convenient to carry.
For construction, you should choose lanterns that work stationary.
- When selecting devices, consider the conditions in which you will have to work, hunt, travel.
For underwater sports, you will need models with a moisture-resistant case; at low temperatures, devices with a special frost-resistant coating are used.
- Pay attention to the power of the light flux. It is not recommended to buy models with too bright light for summer cottages and domestic purposes, because with each lumen the amount of energy required to operate the device also increases.
For such needs, a flashlight of 10-30 lm is enough. Cyclists, hunters use lamps of 100 lm.
- An important criterion when choosing is the glow time. Choose models with 40 lumens of brightness from a single AA battery for up to four hours.
Compact flashlights, which are powered by a microfinger battery, provide a glow of 12 lm for 20 hours.
- The temperature of the light should be as natural as possible.
- Choose models equipped with several modes. The brightness of the flashlight should be adjusted to different environmental conditions. This will allow you to reduce and increase the brightness at different sections of the route, adjust the brightness of the light flux.
- If you're going to be using your flashlight a lot, stick with one that runs on AA or AAA batteries. Battery models are suitable for household needs.
- If there are sealing rubber rings on the thread of the lamp, then the device case is moisture resistant. To prevent the flashlight from slipping out of gloves or wet hands, choose mechanisms with a notch on the body.
- The best finish for the case is anodized (Type II or Type III). Take into account the complete set of the lamp. Special diffusers are used to scatter light in different directions, turning point light into flood light.
- When choosing a rechargeable flashlight, specify the method of charging it.
The most common charger, which is designed for a household network with a voltage of 220 V, some types of flashlights are charged from a car cigarette lighter with a voltage of 12 V, there are models that can be charged from a USB port.
- Buy fixtures from the professional series, which are distinguished by reliability, durability and cost-effectiveness. Such devices are equipped with a solid constructive, well-equipped.
The best flashlights:
- have a solid structure;
- work at low and high temperature conditions;
- moisture and frost resistant;
- easily portable;
- portable and compact;
- have a beautiful appearance.
- Store the flashlight in a dry and cool place so that it can be reached during a power outage.
- Batteries should be replaced regularly, even if they have not been used for a long time.
- It is advisable to have a flashlight in the house and car in case of emergencies. It is recommended to store additional batteries for replacement with the device.
- It is not recommended to store flashlights at high temperatures, as a result, the batteries may leak.
- To avoid overheating of the flashlight, do not use it for a long time at maximum power.
- If you hold a flashlight and your palm starts to sweat, then you should switch to a gentle mode of operation. It is recommended to replace the thermal paste in the flashlight head every 2 years.
- Before use, check that all parts of the flashlight are tightly screwed on. Worn silicone gaskets should be free of defects.
- No matter how shockproof the flashlight is, try not to drop it on the floor, this leads to the fact that the lens and internal electronics deteriorate.
- If the parts of the lamp body become tightly twisted, lubricate the rubber rings with silicone oil. When lubricating, it is not recommended to touch the threads due to the rapid accumulation of dirt.
- If spots of the light beam appear on the lens, you should wipe the flashlight reflector. If it does not turn on, you will need to replace the battery, wipe the threaded elements with cotton swabs and be sure to check the contacts.
- Children may only use the flashlight under the strict supervision of an adult.
- It is impossible to direct the light beam directly into the eyes, this leads to a deterioration in vision.
- Keep water and other liquids away from the batteries or internal parts of the flashlight.
- Do not use damaged batteries.
- Do not leave the device unattended in the maximum operating mode.
- Do not repair the flashlight yourself, it is better to contact specialists.
- It is strictly forbidden to make changes to the design of the lamp.
- Regardless of the functionality of the device, use the device only for its intended purpose.
- Be careful with lithium-ion batteries, they can catch fire or explode if short circuited when exposed to high temperatures.
Warranty service for flashlights is provided for a period of 1 to 5 years, depending on the brand and type of product. To do this, you will need a warranty card or a receipt for the purchase.
The warranty will not be granted under the following conditions:
- the product was used for other purposes;
- the rules for the operation of mechanisms are violated;
- low-quality batteries were used;
- a battery leak has occurred;
- There are traces of mechanical damage on the body of the device.
LED flashlight repair:
- Does not turn on or flickers during operation. One solution is to screw threaded elements. Check the battery, it might be bad. To do this, unscrew the back cover of the flashlight and close the housing.
- If the problem is with the modular button, insert round nose pliers or thin scissors into the holes and turn clockwise.
- Check how tightly the LED module fits inside the case; loose fastening is quite common. To fix this, turn the module clockwise with round nose pliers or tongs until it stops.
You should be extremely careful, otherwise you can damage the LED.
- If the flashlight gives a dim light, the problem is most likely a driver failure - the system that controls the lamp modes and is responsible for supplying voltage. To fix this problem, unsolder the burned out driver, replace it with a new one.
- To check the operation of the LED, you should bring a voltage of 4.2 V to the contact pads of the LED. If it burns poorly, you should change it to a new element.
Lantern manufacturers
The products are made of high-class materials, the preference is given to Japanese and American. The model range is wide, so everyone will choose a flashlight for themselves for any needs: fishing, tourism, hunting, everyday use.
Most of the company's LED lights have the following technical characteristics:
- indication of temperature and charge level;
- automatic transition to a lower brightness mode;
- automatic protection against reverse polarity and chaotic inclusion;
- signal modes (strobe, SOS, beacon).
The assortment includes goods for tourism, hunting and fishing, diving, extreme sports.
Bosch
The group of German companies is a major manufacturer of industrial and household appliances. The range includes a wide range of products:
Products include flashlights, chargers, miniature batteries and batteries for.
The company cooperates with Swiss, Indonesian, American, Chinese firms. Products are delivered to more than 60 countries of the world, have advanced technical properties, and are improved every year.
The pricing policy corresponds to the quality of goods.
ERA
Founded in 1983 under the leadership of TRW to sell products on the secondary market. Today, the brand is a leader in the electrical and electronic automotive parts industry.
The company is engaged in the production of spare parts, identical to original parts, at an affordable cost.
Today, the brand is developing sensors, generators, ignition coils, starter traction relays and drives, detectors. The company has developed more than 10 product lines, the main ones in the auto parts market.
Fenix
The Chinese company is engaged in the production of premium-class flashlights for hunting, hiking, fishing, search work. The products are strong, durable and easy to use.
A wide range of models is represented by powerful search models, camping lanterns, lamps for every day and a variety of accessories.
Fenix products guarantee:
- durable ergonomic body of devices;
- far and near lighting function;
- optimal indicator of power and operating time;
- original design and reliable fastening.
The company uses innovative technologies, an acceptable ratio of quality and pricing policy.
Founded in 1993, the company specializes in the development and distribution of household electrical products. The assortment includes lamps, batteries, flashlights, seasonal electrical goods.
The dealer network includes 400 dealers from 110 cities of Russia, deliveries of goods are carried out to Kazakhstan, Ukraine, Moldova, Armenia, Kyrgyzstan.
Popular German company. With the help of advanced technologies and high-quality materials, specialists managed to achieve the maximum concentration of the light beam. Products are represented by underbarrel, search, headlamps.
The company's products have the following characteristics:
- tightness;
- ergonomics;
- advanced focusing system.
The company is engaged in the production of hand and pocket flashlights. The company's products are not afraid of shock, water, dirt. Flashlights from Maglite are used by police officers, security guards, rescuers, doctors and firefighters.
Products are strictly certified, distributed in Western Europe, Asia and Africa. The price matches the quality.
German manufacturer of power tools, construction equipment, metalworking tools and garden tools. The company has branches in more than 100 countries around the world.
The company presents a huge selection of goods for machinery and construction work. The company's product warranty is 3 years. The latest generation batteries are used.
The company that produces LED lights has been owned by SYSMAX Corporation since 2007. The company's products are suitable for campers, tourists, climbers, cyclists, hunters.
Products are represented by a wide range of models and high-quality accessories. Warranty for flashlights - 60 months. Acceptable ratio of pricing policy and quality of goods.
Petzl
The French company develops special equipment for climbers, rock climbers and spaleologists. Recently, the company produces:
- equipment used for high-altitude work;
- headlamps of general and special type;
- equipment used for rescue operations.
Products comply with European and international standards, safety regulations.
trophy
The Russian company is engaged in the production of products for tourism and outdoor activities. The assortment includes alkaline and saline batteries, lithium cells, watch batteries, accumulators, various types of lanterns (head, camping, spotlights).
Uniel
Russian company engaged in the production of lighting and electrical products. The company's dealer network covers Russia, Germany, France, Hungary, Slovakia, Belarus, Ukraine.
The assortment includes electrical engineering, lighting engineering for industrial and individual needs.
Products are represented by light sources, lamps, decorative lighting, stabilizers, climate control equipment. Products comply with modern technological and legal standards, are strictly certified.
The price corresponds to the quality of the products.
The Russian trademark focuses on the production of portable power supplies at an affordable cost. The company produces high-quality flashlights used in different conditions.
Buyers actively participate in the process of testing and improving products. Prices correspond to the quality of goods.
Good day. There was a flashlight with a diode matrix for 16 LEDs lying around at home, I wanted to remake it in the sense of improving the power supply circuit, all the more so. By itself, the matrix shines quite brightly, but still not the way they say. I took a 1 W LED with a 60-degree collimator as a basis, as a LED driver I took the circuit I already cited in.
Scheme number 1
Of course, I chose a SAMSUNG 18650 2600ma / h lithium battery as a power source.
For the battery discharge controller, I used a specialized controller, which is in the battery of mobile phones - a microcircuit DW01-P with a field effect transistor.
The task was to push all this economy without altering the body of the lamp, since there was very little free space, or rather, there was none at all, except inside the threaded nut that fastens the native diode matrix in the body. I placed the whole thing on two printed circuit boards: on the first, the battery discharge controller itself, on the second light-emitting diode driver. The LED is soldered to an aluminum substrate and is pressed against the lamp body with the same threaded nut. Since the nut has direct thermal contact with the LED substrate and the flashlight body, which is also made of aluminum, we have an excellent heatsink.
Discuss the article SCHEME OF A FLASHLIGHT ON LEDS
In a number of publications, it is proposed to use super-bright LEDs in electrodynamic flashlights ("bugs") instead of incandescent bulbs. To power such LED "light bulbs", it is recommended to insert a rectifier with an energy storage device (battery or ionistor) and a unit that regulates or stabilizes the rectified voltage into the "bug".
Simple experiments have shown that when switched on according to the scheme in Fig. 1, a, the LED shines without blinking and steadily from one half-wave of alternating voltage generated by generator G1.
To protect the LED from reverse voltage, you can not connect the VD1 diode if the amplitude of the alternating voltage does not exceed 10 V. According to data from, LEDs (withstand reverse voltage of 15 ... .20 V and above, and from my "bug" even with intensive work with the lever failed to "squeeze out" more than 9 V.
Therefore, all alterations are kept to a minimum. It is only necessary to make an LED "bulb" by mounting a super-bright LED into a standard base from an incandescent bulb. Necessary actions are described in detail in. I recommend soldering the output of the LED to the threaded part of the base not from the inside, but from the outside, near a shallow cut made with a needle file in the base flange. The flux during tinning is a half (it is more convenient) of an aspirin tablet. The tinned base is washed with water, wiped and dried. After that, the LED leads are molded and soldered to the threaded and central parts of the base. It is advisable to fill the internal cavity of the base with an insulator. I used a drop of polyurethane foam. After its polymerization in a day, you can screw the "bulb" into the flashlight cartridge and use it as usual.
In order not to "disappear" the second half-wave of voltage, it is worth turning on another LED by soldering it in anti-parallel to the first one (Fig. 1, b). Enough space in the basement. This option is preferable to others due to the high light output and uniform loading of the generator. The circuit in Fig. 1c also loads the generator evenly, but since the LEDs are connected in pairs in series, at low generator speeds (during acceleration), the light lights up at a higher voltage. This scheme is more suitable for network operation.
If you use an ionistor as an energy storage device, then it is switched on according to the scheme in Fig. 2.
A few words should be said about the features of the work of ionistors in the "bug". When charging, it turned out that it was not possible to raise the voltage on the ionistor to the desired level, as they say, "on the forehead." After a charge of a certain value is "pumped" into the ionistor, the voltage does not rise higher, no matter how hard you try. But one has only to stop pumping and take a break of no more than 10 ... 15 s (in this case, the voltage on the ionistor drops by several tens of millivolts), as the next pumping passes easily until the next "obstacle", which again must be overcome with a short pause, etc. until the desired voltage level on the supercapacitor is reached. This phenomenon is especially noticeable with two ionistors. To raise the voltage to 4.41 V, it took more than twenty of these "steps *.
Do I need to raise the voltage on the ionistor to the nominal 5.5 V? I suppose not, because it is harmful to the ionistor. The following figures are given in: at a temperature from -25 ° C to + 75 ° C and an operating voltage of 0.6 Unom, the ionistor is capable of operating for 40,000 hours (about 5 years). Hence the conclusion: with Unom = 5.5 V, the ionistor should not be charged to a voltage higher than 3.3 V. In addition, the average direct voltage drop across the LED is 3.6 V. This is higher than the "sparing" 3.3 V for the ionistor.
On a simple experiment, it was found that the discharge of an ionistor to one LED (voltage decrease from 4.41 V to 3.33 V) occurs in 1 min, and increased brightness is observed for the first 10 ... 20 s. After that, the ionistor is discharged with acceptable light output for another 20 minutes. Thus, there is no point in raising the voltage on the ionistor above 3.4 ... 3.5 V. The table shows the discharge time of the ionistor from 3.52 V and the brightness of the LED. The criterion was the legibility of the newspaper text when illuminated by a flashlight. These figures correlate well with the discharge voltages in a battery (two AA-size galvanic cells) electrician's flashlight, in which one LED is installed instead of an incandescent bulb.
It will be easier to mount the circuit shown in Fig. 2 into the lantern body if you remove the traverse with the socket for the lamp base. In the vacated volume, ionistors C1, C2 (diameter - 18.5 mm, thickness - 5.5 mm), diode VD1 and LEDs HL1, HL2 are easily placed.
The SB1 button (MP11 microswitch) is located in place of the leash that moved the traverse relative to the focus of the headlight. A plate of foil-wrapped fiberglass was used as a common wire. The conclusions of all components, except for VD1 and SB1, are attached to it in the right places by soldering. The VD1 diode connects the "+" output of the ionistors to the button. The rest of the installation is made with a flexible insulated wire. The board is fastened with two screws with countersunk heads to the plastic cheek of the generator, which protects the rotor with magnets.
Literature
- Improvement of the electromechanical lamp. -Radio, 2007. No. 9, p.58.
- LED in an electromechanical lamp. - Radio, 2006, No. 8. P.57.
- Tricky bug". - Radiomir, 2007. No. 9, P. 44.
- Super bright LEDs. - Radiomir, 2004, No. 5 ... 7.
- Super bright LEDs. - Radiomir, 2006. No. 11,12.
- LED as a zener diode. - Radio, 1997, No. 3. P.51.
- Ionistors of the K58 series. - Radio World, 2003, No. 6, P. 45.
It so happened that for some reason that is not clear to me, I have a huge interest in all sorts of useful and versatile devices. In this case, I want to make a short review of dynamo lights (“eternal lights”), which can be extremely useful both in everyday life and in terms of survival.
Eternal flashlight Faraday "Universal"
This sample is interesting in that there is no need to buy batteries or accumulators for it. It does not need to be charged from the mains. The lamp of this sample, according to the manufacturer, is designed for 11 years of continuous operation. It also has good dust and moisture protection.
The lantern contains a high-capacity capacitor, which can be charged by shaking the lantern. In addition to the durable, as described above, LED, the flashlight also has a lens that significantly increases its power.
Light weight and relatively compact dimensions make it easy to carry it with you in a bag, backpack.
According to reviews, it is not super-reliable. So they are unlikely to be able to hammer nails and pegs.
Lantern size: 17 x 3.8 cm.
Charging time: from 30 seconds.
Material: plastic
Can buy .
Eternal lantern "Hight Power Headlamp" (headlamp)
This flashlight is convenient, first of all, because it does not take up space in your hands. Does not have batteries. Capable of charging mobile phones (included cord for Nokia phones, and adapters for other manufacturers can be bought in almost any market).
The lamp works in two modes - 1 LED and 3 LEDs.
Charging is carried out using the charger included in the kit. Connect the flashlight with a cord (all included) to the charger, rotate the handle for a minute, and the flashlight works for an hour.
Size: 5 x 6 cm.
Charging time: from 1-3 min.
Material: plastic
Can buy .
Eternal flashlight "Dynamo VIP"
Able to charge a mobile phone (for a conversation up to 30 minutes) or a camera. All necessary adapters are included.
It has two modes of operation - 1 LED and 3 LEDs. Brightness and power are increased with the help of optical lenses.
Charging for a minute provides you with light for one hour.
The design is comfortable, the case on the sides has rubber pads. The charging handle, if it is not needed, retracts into the case and does not interfere.
Size: 15.5 x 5.5 x 4.5 cm.
Duration of work: from 60 min.
Charging time: from 1-3 min.
Material: plastic
Can buy .
Eternal Flashlight in a transparent case
Flashlight with built-in battery and generator. Charges when you press the lever with your hand. Halogen lamps. The perfect gift for a car lover. The size of a pack of cigarettes.
Size: pack of cigarettes.
Material: plastic
Can buy .
Eternal flashlight "PIRANHA"
The flashlight does not require batteries. To charge it, it is enough to rotate the handle on its body for a minute, which will allow 3 LEDs to burn for more than 40 minutes. The lifetime of LEDs is 50,000 hours. The model has 3 lighting modes: 1 LED, 3 LEDs and "blinking" 3 LEDs. The body of the flashlight is waterproof, which allows you to dive with it into water to a depth of 10 m. The head of the flashlight can be rotated 320 °, which makes it convenient to use: just place it in a convenient place and direct the light beam in the right direction.
Size: 151x50x40 mm.
Weight: 152 g.
Charging time: from 1 min.
Material: plastic
Can buy .
Solar lantern
LED flashlight powered by light energy. The solar battery built into the body of the lantern is the main, but not the only source of energy for this lantern. In addition to the solar battery, on the reverse side of the lantern there is a handle, by turning which you can activate the dynamo built into the lantern body, which will recharge the lantern battery, i.e. the lantern can work both from light energy and from a dynamo. There is no light - we use a dynamo, there is light - we use it. The flashlight is completely waterproof and can be used underwater up to 5 meters deep. The life span of three LEDs is 50,000 hours. The time of continuous glow of 3 LEDs is up to 90 minutes.
Size: 147x 61x 45 mm.
Weight: 176 g.
Duration of work: from 90 min.
Charging time: from 1 min.
Material: plastic
Can buy .
Eternal flashlight with radio and siren
A multifunctional device of modern design that combines a powerful LED flashlight, a radio receiver with an antenna and an alarm system with a siren function in a single ergonomic case, which will be useful for summer residents, motorists and tourists. "Eternal flashlight" is independent of power sources. It is equipped with a manual mechanical drive that allows you to charge the flashlight in the absence of an electrical outlet. You can listen to the radio through the built-in speaker or through the included headphones. Just 1 minute of manual charging is enough for 10 minutes of continuous flashlight operation.
Doesn't like water.
Duration of work: from 10 min.
Charging time: from 1 min.
Material: plastic
Can buy .
"Eternal Flashlight" - gem
Your flashlight does not need batteries: rotate the knob for 1 minute and it will
will allow 5 LEDs to light up to 20 minutes. With 3 switches you can
choose the intensity of the glow: 1,2,3,4 or 5 LEDs. Maximum output current 400mA. Maximum output power 2W. Maximum brightness 3000mcd.
"Eternal" flashlight - keychain
The MINI LED DYNAMO FLASHLIGHT is currently the smallest representative of the entire family of self-charging LED flashlights. Its length is only 69 mm. Despite its size, in terms of lighting characteristics, the Mini is not inferior to the same Stalker.
To charge the flashlight, rotate the charging handle in one direction at a frequency of 2.5 - 3 revolutions per second. Three LEDs turn on in a cycle: 1 - 3 - 3 flashes - off.
Size: 70 x 41.5 x 41.5 mm.
Weight: 73 g.
Duration of work: from 40 min.
Charging time: from 1 min.
Material: plastic
Can buy .
Powerful Dynamo Lantern
The dynamo flashlight has 15 powerful (the brightness of one LED is 12000mcd), almost eternal (up to 50,000 hours of operation), LEDs.
- Main parameters and functions: Autonomous work on one charge up to 7 hours.
- The flashlight can be charged both manually, using the built-in dynamo, and from the car's cigarette lighter (12V).
- Two operating modes: intensive (15 LEDs) and economical (9 LEDs).
- Built-in alarm siren.
- Ability to recharge cell phones (4.8V). The kit includes an adapter for Samsung phones (ask for adapters for other phones in the communication stores).
Folded size: 110 x 107 x 155 mm.
Size in working position: 110 x 107 x 225 mm.
Material: plastic
Can buy .
Dynamo headlamp SORBO SB 1058
A unique multifunctional flashlight with a special mount for wearing on the head, has a built-in high-performance energy converter (dynamo) of the latest generation. The peculiarity of this device is that it can be used not only for wearing on the head, but also as a regular flashlight. That is, a special lock allows you to remove the flashlight from the head strap in a matter of seconds. There is also an emergency flash function. The body is made of impact-resistant ABS plastic.
Size: 3.5 x 11 mm.
Duration of work: from 40 min.
Charging time: from 1 min.
Material: plastic
Can buy .
Dynamo flashlight SORBO SB 3070 "All in one"
Portable multifunctional LED torch with built-in energy converter, army Swiss knife, compass, charger for Nokia, Motorola phones, charger for any device with a mini USB port. The kit includes a handle to be worn on the wrist, with the ability to mount in any place convenient for you. The body is made of impact-resistant ABS plastic.
Size: 14 x 5 mm.
Charging time: from 1 min.
Material: plastic
Can buy .
Dynamo flashlight SORBO SB 3080 "A cyclist's dream"
Portable multifunctional LED flashlight with a built-in energy converter (Dynamo), does not use batteries and charging from the mains, a mount that can be placed on the handlebars of a bicycle, a compass, charging Nokia phones (2mm and 3mm), charging any device with a mini USB port. The kit includes a handle to be worn on the wrist, with the ability to mount in any place convenient for you. The body is made of impact-resistant ABS plastic.
Size: 14 x 5 mm.
Duration of work: from 30 min.
Charging time: from 1 min.
Material: plastic
Can buy .
And much, much, and much more. Lanterns - dark darkness. Share, post interesting ones, we will supplement this publication with them.
Faraday is the inventor of the electric motor and the discoverer of electromagnetic induction, it is on it that the principle of operation of our future lamp is based. How does this lantern differ from others, and why does it have a personal name? Everything is simple. This flashlight does not need batteries at all, it is completely based on an alternative power source - electromagnetic induction. In order for our lantern to emit light, just shake it, and the lantern itself has a generator and a rechargeable battery that accumulates energy from "shaking". To better understand the essence of the device, you need to familiarize yourself with the picture, it intuitively shows how everything is located, and you can also understand the essence of the work.
The actual electricity supplied to the diode bridge becomes constant accumulating in 3 volt batteries.
If you look at a flashlight without a case, you can see a solenoid, a cylinder-shaped magnet, rubber stops, a board with diodes, a switch and batteries (in principle, a flashlight can work without it, but then you have to constantly shake it).
The composition of the materials of our lantern.
Such a flashlight can be made from anything, even from a tick-tock box, and an ordinary ballpoint pen, or rather its hollow tube, can serve as a tube for winding wire. The next element is a little more difficult to get, the author took magnets from a hard drive, but in principle, any strong magnets of a small size will do. In theory, in any electrical engineering store you can find cheap powerful magnets for 30 rubles apiece. Instead of batteries, you can use capacitors on a budget. Also, for beauty, a couple of LEDs are needed. Well, the scheme, where without it.
The author of this device pays special attention to the fact that there is one important detail-feature in the winding of the coil: although you most likely noticed this from the diagram, the coil consists of two windings, and its total length is about 40 mm. Let's mentally divide the column of the coil into two halves. On the first half, it is necessary to wind 600 skeins with very thin wire, its diameter should be somewhere around 0.08 mm. Repeat the same operation on the second half of the flashlight coil. Having done this, you will get the coil you need for the device, consisting of two sections.
Continue to collect the flashlight according to the scheme, you will get the finished product - good luck.
And be sure to install the limiters, they are necessary so as not to damage the "packing" of the flashlight, as well as for faster movement of the magnets when "shaking". After all, the better the magnets move, the faster the energy accumulates. And this, in turn, means that you have to spend less energy. And therefore you will still have a lot of energy to create new interesting and fun devices. Good luck and success!
