Created by takide
Status: Active

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.