One coil LED oscillator
This shows an Led oscillator that will run off light energy as well as energy from a battery. I show it here runnng off the light from a flashlight and off my homemade John Bedini Hydrate Crystal Cell. The circuit uses a single coil and two transistors. The basic circuit was posted on the internet by Russell McMahon and was modified by me by adding the solar cell. Russell commented that the original circuit “idea” is very old and he simlpy set up the circuit to flash an LED.