Joule Thief FlashlightA cool LED flashlight with an ultra long battery life.
Created by takide
Troubleshooting Step 6 of 6
Building circuits can be tricky sometimes. Here is a list of common things that can keep your LED flashlight from working.
My Joule Thief Flashlight Won't Turn On?!
- Check to make sure that the battery has a good connection.
- Double check that the LED has the correct polarity. (The short lead is the negetive lead.) Make sure that the short lead is connected to ground.
- Make sure the coil is the correct orientation. You can try swapping 1 lead from each coil until the device is working.