Quick Start Siren (CB25765E)

We found this circuit in the October 1994 Electronics Now magazine. The CMOS IC is uncommon these days and the output is low power.

| Clique na imagem para ampliar |

Capacimeter (CB18297E)
This capacitor for small capacitances is based on the tuning of a receiver circuit. The variable is...
Telephone Interception Detector (CB17045E)
This 1995 documentation circuit detects when an extension on a phone line is active. Adjustment of the...
Tachometer 555 (CB15026E)
This analog tachometer can be used in cars with platinum or in robotic and automation applications to...