We found this micro amplifier in a technical documentation from National Semiconductor. The circuit can be used on an experimental phone, being powered even by alternative power sources.
We found this circuit in the June 1988 Radio Electronics magazine. The power supply must be...
This circuit is based on the voltage reference that is uncommon today MC1403. Equivalents can be...
May 2016 - It can be obtained from Mouser Electronics new connectors Ultra-Fit ™ series from Nikex for...