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.
The first circuit we present consists of a step-down DC / DC converter with input voltage from 2.5 to...
This source for 50 W amplifiers per channel was found in 1967 Delco documentation. Transistors are from...
This interesting circuit of an ancient American publication makes the pattern of an exclamation mark...