This circuit can be used to test crystals from 1 to 20 MHz and also has an output to measure their frequency. We found it in the November 1998 Electronics Now magazine.
This interesting sine wave oscillator circuit for the audio track uses an incandescent light bulb...
Found in Popular Electronics from the 1980s, this circuit is intended for switching filters with...
The shunt type regulators are connected in parallel with the load, deflecting the current to...