This circuit for analog video signals was found in a 90s 303 Circuits. The used digital switch is a component still common today.
This circuit found in a 1974 English magazine was originally designed to automatically trigger a slide...
A staircase signal is produced by this circuit using a TTL IC and an operational amplifier. The...
This circuit is from an American publication from the 50's. The transistors are made of germanium and...