Based on the LF256 operational amplifier, this circuit was found in the September 1989 issue of Radio Electronics magazine. The indicator is analog, and the power supply must be symmetrical.
January 2017 - Mouser Electronics already has in stock the Epson TCXO TG2016 crystal oscillators for use...
This circuit turns on a lamp when the night comes and turn it off in the morning. The circuit...
This circuit is from a 1991 publication. The integrated circuit used is an integrated radio from...