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.
This electronic variac has the traditional configuration with triac already explored on the site,...
With this oscillator we can obtain a signal of 10 W of power at the frequency of 100kHz. The...
This circuit is based on an LM3900 transconductance operational amplifier, found in 1992...