Speaker protection (CB8193E)

Found in a 90s Silicon Chip documentation this circuit is intended to protect a speaker system in case of amplifier failures.

| Clique na imagem para ampliar |

Ladder Generator (CB12028E)
This circuit came out in an English magazine from 1978. The circuit generates a ladder of 128...
Remote Phone Ring (CB1349E )
This circuit, obtained in an old publication, causes a second telephone bell to be played in a...
Traffic Light TTL (CB5003E)
This TTL traffic light circuit was found in an English magazine from 1977. The magazine no longer...