Found in a 90s documentation, this circuit makes use of D1, a switching diode that is uncommon today. D3 is an LED. The circuit monitors 12 V batteries.
Mouser Electronics is announcing the availability of the new voltage regulators with low dropout...
This circuit is from a 1982 publication but can be assembled with BF245 for Q1 and BC548 for Q2....
This circuit was found in documentation from the 1970s. It eliminates contact bouncing, providing...