This circuit is from a 1980s Motorola documentation. The circuit can be set to fire from 60 to 120 V DC or from 42 to 84 V AC. The circuit has a forehead button that activates an indicator lamp.
This circuit is from the 1977 RCA Linear Integrated Circuits Manual. The circuit has a...
This circuit was found in a Popular Electronics from the 90's. The operating curve is given next...
This circuit produces a sound effect that can range from the sound of a bird to a siren. The...