Comment on Disconnect wire to close a switch with a simple circuit
Romkslrqusz@lemmy.zip 10 hours agoWith how I’ve been going about this, technically, the load of U2 / Speaker Module would be on the Drain side of Q3 PMOS rather than the source side - and that’s the key difference between what I’m doing and the Piezo speaker tripwire circuits.
Could this be the reason I’m not seeing success?
jeinzi@discuss.tchncs.de 9 hours ago
With a PMOS device used for simple on/off switching, placing the load between drain and ground would be correct. With an NMOS FET, the load should be between drain and VCC.
In general: NMOS source to GND, PMOS source to VCC.