Remote Dialer (CB24765E)

This circuit was found in the October 1983 Radio Electronics issue. It is applicable to old analog telephones. The circuit uses common components.

| Clique na imagem para ampliar |

Dwell Meter (CB4961E)
This circuit is from the time when cars used contact breakers. This 80's version measures the dwell...
Tolerance Indicator For Capacitors (CB4650E)
The basic idea of this circuit is to indicate the tolerance of a capacitor by reference to a...
Multitester (CB3834E)
This simple multitester tests continuity, semiconductors, leaks, and other common component...