Originally created to power an 80's RTTY printer, this circuit can be used in other applications. The circuit is from an Amateur radio of the time.
This very high input impedance circuit is suggested by Texas Instruments. The circuit can be...
We found this circuit in the August 1994 issue of Electronics Now magazine. The circuit is based on...
This bargraph circuit using LM3914 was found in the October 1980 Radio Electronics magazine. Note...