Power regulators, thyristor and transistor. Dimmer 12-230 V
Two power regulator circuits: one designed for a lower voltage, the other for 220-volt mains voltage (although both circuits can withstand mains voltage). The first circuit is based on a transistor (MJE13007); the operating voltage of the entire circuit depends on the transistor's nominal operating voltage. The second circuit is a typical thyristor dimmer, but with a minimal number of components, it can be adjusted from 0 to 99 percent of the power, up to 200 watts.
Schematics from the video in the Telegram channel:
https://t.me/radiomansarda