PicoMite: driving a small speaker

Author	Message
Mixtel90 Guru Joined: 05/10/2019 Location: United Kingdom Posts: 6300	Posted: 01:45pm 25 Mar 2023       FYI, Tom, you can bias a CMOS inverter into linear mode using a resistor from output to input. In fact, you can even make a small amplifier capable of driving a tiny speaker or earpiece from one. However they don't have much output current availability so you usually have to parallel several up to get them to be useful. :)