Found in a Popular Electronics from the 90s, this circuit is intended to measure the harmonic distortion of an audio signal. The circuit can be tuned between 970 and 1030 Hz.
This relay shield was found in the October 1993 Electronics Now magazine. The circuit is powered by...
In the figure we have the basic configuration of a regulator for 12 V x 1 A suggested by Motorola in...
This circuit can be used as part of a Vox project or as an input shield for a microcontroller that...