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.
Short duration pulses can be obtained with the relaxation oscillator that uses common transistors and is...
This circuit is from a Radio Electronics from August 1992. The transistor used allows the control of...
This circuit was found in a publication by National Semiconductor. The problem for designers who...