Found in Motorola documentation from the 90s, this circuit makes use of a triac from that time. The circuit is for the 110 V mains but can be modified for other grid voltages.
This TTL circuit can be used as a shield. The frequency can be changed by changing the capacitors. ...
Found in Popular Electronics from the 90s, this generator uses integrated circuits from that time....
This circuit was obtained from a 1978 Practical Wireless. It causes an LED to flash at a frequency that...