This car battery monitor was featured in the January 1988 issue of Radio Electronics magazine. The circuit uses common transistors and has 3 levels of indication made with common LEDs.
This circuit was obtained from a 1966 General Electric documentation. It can serve as a basis for...
This circuit was found in Siliconix documentation from the 1980s. Equivalent operational...
Obtained from a 1980s Linear Technology documentation, this circuit has a hysteresis of less than...