This circuit was obtained from an old Signalite documentation. Neon lamps are special types of the time. The operation occurs at low frequencies.
This circuit can be found elsewhere on this site as part of alarms or sirens. The circuit given is...
This 3-digit code switch was obtained from an old American documentation. The capacitor is 470 uF...
Found in a 1967 Electronic Design, this circuit changes the phase of a signal in 8 different ways, given...