This circuit is from an old American documentation and its use in motorcycles with 12 V is suggested to power 6V radios. The transistor can be the BD136 and BC548.
This project was published in the April 1989 issue of Radio Electronics magazine. It drives LEDs...
This circuit was found in a 1965 magazine. The circuit is powered by a single battery and uses...
This circuit was obtained in a Motorola manual from 1978. We can use any triac and the coupler with...