> You can also slap a reed switch (e.g. a normal door open/close sensor) near your dumb doorbell's magnetic coils > The simpler reed switch method of detecting

> You can also slap a reed switch (e.g. a normal door open/close sensor) near your dumb doorbell's magnetic coils > The simpler reed switch method of detecting current is rock solid. That's really clever! I'm gonna try that. Thanks for sharing.