LED lightbulb linear dimmer

LED lightbulb dimmer from ATX PC power supply parts ( transistor with heatsink and rectifier ). Dimmer is a linear type - for larger powers ( 100W classic bulbs ) need 20cm2 heatsink.
Circuit works with 110...230V AC 50/60Hz or DC
With trim pot. ( R3 ) can set LED bulb turn off point.

[@radiofun232]

Well done, very interesting! Thanks for the schematic. 13 feb. 2024.

[@MAKSMIT-ME]

Очень хорошо 👍

[@kurlandtravel]

❤❤❤👍👍🥰

[@coffeecuppepsi]

So essentially you're putting a current limiter in series with the load... And the rectifier means the limiter always has the right polarity applied to it? Smart 🤓

[@ingussilins6330]

Rectifier for transistor and all circuit like electronic reostat.
Transistor don't work in AC circuits.

[@user-oq1um2ct1l]

Для регулировки мощности паяльника подойдёт эта схема?

[@ingussilins6330]

Можно использовать для паяльника ( схема работает до 100Вт - только с радиатор 20см2 )