We found this circuit in documentation from the 90s. Instead of a voltmeter, you can use the voltage scale of a multimeter. The circuit tests batteries under load.
This circuit was found in an old British publication from 1976. It must be powered with 5 V and...
This midrange filter for sound systems was found in the May 1988 issue of Radio Electronics...
January 2017 - Mouser Electronics already has in stock the Epson TCXO TG2016 crystal oscillators for use...