This mains-synchronized circuit produces a simple 1 pulse per second. The circuit is from a Radio Electronics magazine from May 1977.
This 80s signal follower makes use of an audio amplifier of the era. The circuit can be adapted to...
This circuit from Ferranti was released in 1969. It makes use of the company's transistors that admit...
This transmitter operates in the FM band emitting beeps that can be picked up on a common radio at...