/diy/ - Do It Yourself

>>1545102
At maximum waste heat (a half maximum voltage square wave), each transistor would average ~3W or so, which is quite possible with TO-220 packages on a heat-sink. Something like this image, with a volume potentiometer instead of the 160kΩ resistor, would work just fine. FET names are just for testing. BJTs might work without an issue since you're only pulling 600mA maximum, but you'd have to either go for darlingtons or deliberately go for op-amps that can supply a moderate current (possibly up to 100mA).