This circuit is from a Radio Electronics magazine from May 1986. Observe the voltages applied to the capacitors, taking care that the capacitor under test can withstand them.
This circuit was found in the July 1990 Radio Electronics magazine. It is based on the 3-digit...
This circuit can be used on sound mixers to obtain effects. We found the circuit in a 1997...
This oscillator uses a ceramic resonator to determine the frequency. This kind of element is found...