Long Running Led Light Experiment
These are two long running battery powered ‘Joule Thief’ type led lights. They were built to study AA battery discharges over long spans of time. I am using a low drain blocking oscillator blinker circuit. This project was inspired by ‘Magnetman2010’ here at YouTube who has a nearly identical device still running after 3 years —-on the original AA battery.
Two corrections to the circuit diagram:
1) The transistor is a 2N2222 NPN
2) The two chokes (inductors) are 100mH