This circuit was taken from a Popular Electronics from the 90's. The power step can be changed to operate with the most powerful LEDs available today.
Found in an EEE this circuit uses FETs of the time and a bipolar one. Current equivalent...
This circuit was used to reinforce radio signals for listening on the phone, making it possible to listen...
September 2017 - Mouser Electronics is already stocked with NXP MRF13750H transistors for RF power...