TTL Siren (CB9080E)

This simple TTL siren was found in a 1980s Electronics Today International. The power supply is 5 V and the integrated circuit can be the 7400.

| Clique na imagem para ampliar |

Buzzer circuit (CB25102E)
Indicated for activation by microcontrollers, this circuit was found in the Radio Electronics...
Operational Overcurrent Switch (CB12313E)
We found this circuit in an English publication in 1991. The circuit can be assembled with...
JFET AM Tuner (CB22037E)
This tuner circuit was found in an old English documentation. The JFET can be any general purpose...