This adjustable frequency circuit was found in December 1986, Radio Electronics magazine. The base frequency is given by C1 and the power supply must be 5 V.
This power supply can supply voltages from 3 to 9 V and is very useful on the bench. The maximum...
This circuit sources a Constant current to a load. The current is determined by R2. In the...
This circuit can shift the phase of a signal from 0 to 360º. FETs admit equivalents and the...