This is a circuit suggested by Linear Technology in a 1980s documentation. The integrated circuit is from the era. Observe the input and output voltage.
This circuit converts signals from the longwave band of 350 kHz to 500 kHz to 4.35 to 5MHz. The...
This circuit allows you to read temperatures with a common digital voltmeter. We found it in the...
This simple circuit for an audio link uses a lamp, which has a very poor frequency response, but...