Panic button (CB7077E)

Found in a 1968 Motorola publication, this circuit generates a high-powered audio tone when triggered. Equivalent transistors can be used.

| Clique na imagem para ampliar |

Astable with Transistors (CB12633E)
This circuit generates a rectangular signal whose frequency depends on the electrolytic...
Timer Using Unijunction Transistor (CB933E)
This circuit was found in an old publicatio n from the year 1958. The circuit controls an external load by...
Picoampère converter (CB5108E)
This circuit that converts very low currents into voltage was obtained in the 80's used component...