dyno batteries
Mechanically powered flashlight
Dyno torch
Interior of a dyno torch
A dyno torch is a flashlight or pocket torch which stores energy in a flywheel. The user repeatedly squeezes a handle to spin a flywheel attached to a small dynamo, supplying electrical current to an incandescent bulb or light-emitting diodode. Because electrical power is only produced when the handle is squeezed, a switch is not needed. The flywheel makes sure the light is fairly constant, despite the fact that the power supply (the squeezing) is intermittent. Dyno torches were very popular in Europe during World War II[citation needed] because the electrical power supply to homes was not very reliable.
In an alternative design, the dynamo charges a rechargeable battery or a capacitor, and may offer 15 minutes or more of illumination for 1 minute of charging.[citation needed] This version could be considered less reliable for emergency use because the battery will eventually fail and need replacement.
Dyno torch design
In the photo, the L-shaped handle has a gear rack, which spins the white step-up gear, which in turn spins the flywheel on which is mounted the dark grey magnet, seen on the left. The magnet induces an electrical current in the red copper winding, seen on the right. The current from the copper winding flows through the incandescent bulb filament (not shown). A spring and ratchet returns the handle to its original position after each squeeze.
Shake type design
The linear induction or “shake flashlight” is another design of a mechanically-powered flashlight. It was sold via direct marketing campaigns beginning in 2002.
This design contains a linear electrical generator which charges a capacitor when the flashlight is shaken lengthwise. The battery or capacitor powers a high-intensity white LED array. In the linear generator, a sliding rare earth magnet moves back and forth through a solenoid, a spool of copper wire. A current is induced in the loops of wire by Faraday’s law of induction each time the magnet slides through, which is used to charge the capacitor.
Simply shaking the light for about thirty seconds provides about five minutes of light. Shaking the unit for 10 to 15 seconds every 2 or 3 minutes as necessary permits the device to be used continuously. The capacitor is used instead of a rechargeable battery since it doesn’t wear out like a battery.
Other functions
A crank-charged flashlight with built-in AM/FM radio.
Some mechanically powered flashlights include other functions and features beyond just a source of light. For example, certain models may have additional special operating modes, such as flashing red or yellow lights that can serve as a caution or warning to other people that might see the light. Some models include a loud electronic siren that can also help warn of danger, or assist in locating someone who is lost. There are also many models of mechanically powered flashlights that include a built-in AM/FM, weather or shortwave radio.
See also
Self-powered equipment
External links
ElectronicCrafts.org: Homemade shakelight
Instructables: A homemade solenoid type dyno torch inside a TicTac box.
Die Goldcap-Dynamolampe (in German) converting a dyno torch to LED operation with capacitor storage
Categories: FlashlightHidden categories: All articles with unsourced statements | Articles with unsourced statements from February 2007 | Articles with unsourced statements from June 2009
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Dynamo Illuminator Wind-up LED Flashlight $8.90 Be prepared for an emergency at home or on the road with this super-bright flashlight that never needs batteries. One minute of cranking gives you up to one hour of super-bright light – which could make all the difference in an emergency. Features: * Compact, handheld design |
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eGear Dynamo DYNO-MITE LED Keychain Flashlight (Color May Vary) $4.95 Incredible 10 days burn time on low setting. 40 hours burnon high setting. 12 Ultra Bright LEDs never need replacing.Adjustable Brightness Dimming Switch, Weather-Resistant, andCool Touch LED bulbs keep lantern cool. Runs on 4 D cellbatteries (not included)…. |
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Dyna-Glo 23,000 BTU Portable Kerosene Convection Heater $149.99 The Dyna-Glo model RMC-95-C2 portable convection kerosene heater is great for emergencies and power outages, requires no electricity. Multi-room, omni-directional kerosene heater features an anti-contact heat safety guard, manual shutoff switch, easy-to-change wick and fuel gauge. Double-walled 1.9 gallon fuel tank provides approximately 12 hours of heating. Heating capacity of 23,000 BTUs, coveri… |
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Fisher-Price Go Baby Go! Poppity Pop Muscial Dino $29.99 Fisher-Price Go Baby Go Poppity Pop Musical DinoThe Poppity Pop Dino is an adorable dinosaur character with 6 brightly colored balls. As baby bats at the roller ball, drops one of the balls down the dino’s tail or onto his back, the popping action and music begins. As the balls pop up, down and around, baby will be encouraged to grab them and start all over again. And when an occasional ball pops … |
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Dinosaur Train – Motorized Adventure Track Set $20.00 Based on the new Henson PBS hit show, the Adventure Track Set allows children to combine both dinosaur and train play into one action packed set. With this set, all of your collectible dinosaurs can ride in the lights and sounds train car and explore all 7 of the cool dinosaur destinations. The Adventure Track Set includes 3 collecitible dinosaurs, Buddy, Mr Conductor and Laura to help get the exp… |
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LEGO® Creator Monster Dino (4958) $89.99 Rrroar! He’s alive! Build the monster dinosaur with the new power functions to make him walk forward or backward, move his head and arms, and roar! Add glow-in-the-dark elements to make him even more intriguing. When the Monster Dino has finished battling, create a walking spider or a crawling crocodile. Step-by-step instructions for three models in one box, plus photo inspiration for many more. I… |
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DYNOJET USB 9V BATTERY POWER ADAPTOR $14.99 The power up adapter allows users to program and interface with the Power Commander on their desktop without being connected to the bike…. |
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MOOSE DYNOJET POWER COMMANDER USB POLARIS RANGER 700 XP $359.95 MOOSE RACING DYNOJET POWER COMMANDER USBFITS MODEL: POLARIS RANGER 700 XP 4X4 EFI 06-08 USB (Universal Serial Bus) port provides an instant, problem-free way to connect your Power Commander to a computer Provides precise information for fine-tuning a fuel-injected ATV when changing an air filter, installing a new exhaust system or doing additional engine performance modifications Includ… |
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MOOSE DYNOJET POWER COMMANDER USB LT 700 KING QUAD $359.95 MOOSE RACING DYNOJET POWER COMMANDER USBFITS MODEL: SUZUKI LT700 KING QUAD 4X4 05-07 USB (Universal Serial Bus) port provides an instant, problem-free way to connect your Power Commander to a computer Provides precise information for fine-tuning a fuel-injected ATV when changing an air filter, installing a new exhaust system or doing additional engine performance modifications Includes … |
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Kaito Voyager Pro KA600 Digital Solar/Dynamo AM/FM/LW/SW & NOAA Weather Emergency Radio with Alert & RDS, Black $79.95 What is RDS? Radio Data System, or RDS, is a communications protocol standard for embedding amounts of digital information in conventional FM radio broadcasts. RDS standardizes several types of information transmitted, including time, station identification & program information. What is NOAA Alert? |
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Emergency Solar Hand Crank Dynamo AM/FM/NOAA Weather Radio, Flashlight, Reading LED Light, Cell Phone Charger w/ USB adaptor $19.99 This is a MUST for any survival kit. It comes with AM/FM/SW/weather band radio, thermometer, cell phone charger jack, bright LED flashlight, and a flip up LED reading Light. It can be charged by solar, hand crank, 110 outlet (power adaptor not included), or 3 AA batteries (not included). Unit is small, compact, light, and easy to carry. Features: 4 Ways to Power Up: |
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Eton ARCPT300W American Red Cross Axis Self-Powered Safety Hub with Weather Radio and USB Cell Phone Charger $69.99 Self-Powered Safety Hub with AM/FM/NOAA Weather Alert and USB Cell Phone Charger… |
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Dynaflex Pro Gyro Exerciser $50.99 Dynaflex Regular Pro strengthens your wrists, forearms, etc. Designed with a high performance rotor, which can reach speeds up to 13,000 rpm’s and puts out 38 lbs. of torque, it aids in the prevention of repetitive strain injuries and carpel tunnel syndrome. It improves coordination while building strength!? The Pro Plus comes with a removable top cap, which allows the insertion of the optional sp… |
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DynaFlex Docking Station with Blue Powerball 12075 Strengthening System $41.29 Jump start your gyro exerciser and get it up to operating speed in seconds with the DynaFlex PowerDock docking station. Bundled with DynaFlex’s Powerball (blue) hand exerciser, the package offers everything you need to increase your range of motion and condition your arm, elbow, and shoulder muscles. The ultimate in engineering design, the Powerball offers the same user-friendly features as the Dy… |
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Dynamo Illuminator Wind-up LED Flashlight $8.90 Be prepared for an emergency at home or on the road with this super-bright flashlight that never needs batteries. One minute of cranking gives you up to one hour of super-bright light – which could make all the difference in an emergency. Features: * Compact, handheld design |
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eGear Dynamo DYNO-MITE LED Keychain Flashlight (Color May Vary) $4.95 Incredible 10 days burn time on low setting. 40 hours burnon high setting. 12 Ultra Bright LEDs never need replacing.Adjustable Brightness Dimming Switch, Weather-Resistant, andCool Touch LED bulbs keep lantern cool. Runs on 4 D cellbatteries (not included)…. |
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Dyna-Glo 23,000 BTU Portable Kerosene Convection Heater $149.99 The Dyna-Glo model RMC-95-C2 portable convection kerosene heater is great for emergencies and power outages, requires no electricity. Multi-room, omni-directional kerosene heater features an anti-contact heat safety guard, manual shutoff switch, easy-to-change wick and fuel gauge. Double-walled 1.9 gallon fuel tank provides approximately 12 hours of heating. Heating capacity of 23,000 BTUs, coveri… |
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DYNOJET USB 9V BATTERY POWER ADAPTOR $14.99 The power up adapter allows users to program and interface with the Power Commander on their desktop without being connected to the bike…. |
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MOOSE DYNOJET POWER COMMANDER USB POLARIS RANGER 700 XP $359.95 MOOSE RACING DYNOJET POWER COMMANDER USBFITS MODEL: POLARIS RANGER 700 XP 4X4 EFI 06-08 USB (Universal Serial Bus) port provides an instant, problem-free way to connect your Power Commander to a computer Provides precise information for fine-tuning a fuel-injected ATV when changing an air filter, installing a new exhaust system or doing additional engine performance modifications Includ… |
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MOOSE DYNOJET POWER COMMANDER USB LT 700 KING QUAD $359.95 MOOSE RACING DYNOJET POWER COMMANDER USBFITS MODEL: SUZUKI LT700 KING QUAD 4X4 05-07 USB (Universal Serial Bus) port provides an instant, problem-free way to connect your Power Commander to a computer Provides precise information for fine-tuning a fuel-injected ATV when changing an air filter, installing a new exhaust system or doing additional engine performance modifications Includes … |
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Kaito Voyager Pro KA600 Digital Solar/Dynamo AM/FM/LW/SW & NOAA Weather Emergency Radio with Alert & RDS, Black $79.95 What is RDS? Radio Data System, or RDS, is a communications protocol standard for embedding amounts of digital information in conventional FM radio broadcasts. RDS standardizes several types of information transmitted, including time, station identification & program information. What is NOAA Alert? |
