This circuit is from a 70s Burr Brown documentation. The components are from the time and the waveforms given next to the diagram.
This device can be used as a proximity arm, touch sensor or electronic bell. When connected to a...
This circuit is from the component's own manual, but it applies to others in the same family. The...
This circuit was found in a 90s Popular Electronics. The circuit uses several relays in order to...