Telephone Ringer Amplifier (CB25751E)

For analog lines, this circuit was found in the August 1994 issue of Electronics Now magazine. The transistors are common general-purpose types.

| Clique na imagem para ampliar |

Temperature transmitter (CB9392E)
This circuit is a wireless temperature transmitter for RF signals in the range of 0.2 to 2 MHz...
1 to 2 W Amplifier (CB4760E)
We found this circuit in an old Radio Electronics. Components can be replaced by modern...
Immobilizer (CB6039E)
This immobilizer circuit for vehicles was found in a 80’s Hands On Electronics. The circuit...