LM390 Intercom (CB25310E)

This two-channel wired intercom was found in the April 1990 issue of Radio Electronics magazine. Maximum cable distance depends on cable thickness.

| Clique na imagem para ampliar |

Flashing Alarm 555 (CB17256E)
This simple circuit, based on an astounding 555, was found in a 2001 documentation. The circuit...
Sine wave generator (CB25129E)
This circuit generates sinusoidal signals that depend on the input oscillator. The circuit is from...
Triac Dimmer (CB24124E)
This is one of many power control or dimmer configurations that we have found on this site and in...