Mechanical bistable (CB9228E)

Found in an Elektor from the 90s, this TTL circuit can be used as a shield without any bouncing problems. The circuit must be powered with 5 V.

| Clique na imagem para ampliar |

LED VU (CB22157E)
This circuit was found in a 1989 publication. The operational amplifier supports equivalents. The...
Humidity sensor (CB6953E)
This humidity sensor indicates the different levels of conduction of the sensors through an LED...
Light level control (CB20718E)
Found in documentation from the 70s, this circuit uses components from that time. Some of these...