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.
Obtained from the 1976 Siemens integrated circuits manual, this audio amplifier has thermal...
This Texas Instruments integrated circuit, available from Mouser Electronics, has a 91 dB common...
This filter was found in a 1975 American technical publication. The filter can be of any type and...