Diode test (CB20735E)

This simple diode test appears at other points in this section. Or circuit can be adapted to use LEDs instead of ordinary lamps.

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Impedance Matcher (CB14462E)
This circuit matches a source of high or medium impedance audio signals with a low impedance...
Telephone extension alert (CB8627E)
Found in a 1993 Electronics Hobbyst Handbook, this circuit uses components that are still common...
555 Pulse Width Generator (CB25959E)
This pulse width-tuned circuit was found in the March 1996 issue of Electronics Now magazine. The...