This circuit makes use of components from the time it was published. The TCA151 is not a common component today. The circuit generates 10 to 10 kHz signals.
This circuit was found in the November 1992 issue of Radio Electronics magazine. The circuit has...
In this circuit found in a 1991 publication we can use the 2N2646 unijunction transistor and the...
This power source was found in an old Argentine publication from 1973. The transistor could be the...