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.
Found in a Popular Electronics from the 90s, this circuit reaches 100 kHz and battery power is...
This high current regulator with low voltage drop was found in the datasheet of the used...
This circuit has a gain of 34 dB and a good power to be used as an audio booster in cars. The...