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Super Size Your Battery Run Time: D Cell Battery Packs
LED Lighting: One "Dead" D Cell At A Time.
Easy Light Beam Audio Transmitter: Only 3 Parts
Condenser Microphone Power Supply
Modify The RadioShack Amplifier to Power a Condenser Microphone Element
Uses For Dead Car Batteries And Sealed Lead Acid Batteries
Easy Light Beam Transmitter: Only 3 Parts
Cheap And Easy 12V Clip Lights For The Off Grid World
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Light Wave Communications: Classroom Demonstration Notes
Stylish Two Drawer Faraday Cage
Modify The Radio Shack Mini Amplifier to Power a Condenser Microphone Element
Something is wrong in your schematics, you can't have a 5k pot in serie with the Led and this for 2 reasons :1) a white Led has a trigger voltage of 3v min. which leaves 0.5v max. for the 5k, implying an intensity of 0.1mA, this means 0.3mW for the Led, I don't think such Leds exist appart from special domains.2) when the pot value decreases close to 0, the max available intensity, delivered by the converter, passes thru the pot and it simply burns.
LED Lighting: One D Cell At A Time.
400 Farad Super Capacitor Flashlight. Build This One. It's Easy.
LED Lighting One D Cell At A Time.
Emergency Food: Double Your Calories for Pennies a Meal.
Except that "co2" is green. It being plant food an all, more co2 = more green...Those that use the term "Green" hearken back to the days before CO scrubbers were added to all the power plants. CO being the particle that will coat the surfaces of a green plant, causing it to die. So now they only emit plant food. Ask any greenhouse owner why the install expensive co2 generators...
Luxstar's Scratch Pad
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