I built this blinking joule thief circuit over 6 years ago and it has been blinking away ever since. When I built this device the battery voltage started out at 1.600 Volts and now, 6 years later, it has dropped to 1.327 V and the battery has started leaking. I will continue to do updates on this project as time goes on.

Playlist of all the videos I have made on this project:
   • Long Life Blinking Joule Thief  

Video I got the idea from originally:
   • 8 year blinking Joule thief  

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  / eman2000_yt