All Questions

Tagged with
-1
votes
1answer
64 views

Small wind generator project

Why when I spin a dc motor (USED AS A GENERATOR )with drill it does not light up led , but when I spin it with my fingers it light up
1
vote
2answers
136 views

Voltmeter vu-meter dynamo

To start, I have no experience with electronics except what I've been googling the past week. What I'm having issues with is finding a way to make a voltmeter that functions like an led vu-meter would....
3
votes
1answer
394 views

I'm looking for help designing a circuit that lights LEDs in response to physical output on a small electric generator

I made a little display for kids that various non-profits have been using that helps them understand how much electricity different kinds of lightbulbs use. It's very simple, using bike parts to ...
1
vote
1answer
691 views

Inverter Generator Watt Question

I'm not sure how to search this so hopefully someone will answer. I'm rigging a floundering boat for my son and want to use LED light bars on the front and sides. I want to power then with an inverter ...
0
votes
1answer
781 views

Why won't the LED illuminate this way?

Attached a 9vdc motor to an LED to simulate a simple "generator" and I can get it to illuminate by swiftly spinning the motor in quick bursts, but if I connect a drill to the motor so there's a ...
12
votes
2answers
13k views

Does a DC toy motor emit AC when you spin it?

I just watched a video on Facebook by somebody who built a project to run an LED using a 9 volt DC motor scrounged from a battery operated toy. They simply wired the LED to the motor and then used a ...
2
votes
4answers
4k views

Power factor correction for LED lighting on a generator

I'm the electrician for a club that builds an illuminated carnival parade float, and historically we've lit our float using around 10,000 x 40w incandesant lamps powered by a 800kVA 3 phase generator. ...
1
vote
0answers
518 views

Bottle dynamo (bike generator) rectification and stabilization circuit for LED light

A friend of mine would like to convert her bottle dynamo (bike generator) to run a LED light. The light needs to stay on for maybe 90 secs when the bike is stopped, and needs to blink (using a ...
0
votes
2answers
493 views

LED Bike light - blowing at high speeds? [closed]

My bicycle is equipped with a about 5 year old hub dynamo and a LED front- and backlight. I suspect the dynamo is a DC-generator though this likely may be false. But if its true, it would mean that ...
2
votes
1answer
186 views

Temporary, high-power energy storage

I'm currently building a small, portable human-powered charger for supplying a 1W led. I salvaged a dynamo core from a torch, but I'm unable to use other components inside since the torch is only ...
0
votes
1answer
2k views

Building a new dynamo bike light

So here is the deal, for the 2nd time in less than a year, my halogen bike light on the front has popped due to cold. This is rather bothersome and I can't find any nice inexpensive LED alternatives ...
3
votes
1answer
843 views

Simple generator to light a series of LEDs question

Playing around with a simple circuit idea with friends but none of us have really worked with circuits since college so we need a little guidance. The thought is to have a small generator (someone ...
6
votes
4answers
5k views

Blinking an LED using a generator as the source of electricity

I made a little windmill which is turning a small generator to light up an LED, but the voltage is too low even with high wind speed for the LED to glow. I thought maybe the electricity could be ...