This circuit was found in documentation from the 90s. The transistors can be general-purpose equivalents. The circuit has two versions, one that drives LEDs and another that drives a relay as a load.
This simple alarm using only transistors was found in a 1990 publication. It can be powered by D...
April 2017 - Microchip's new PIC18LF66 and PIC18LF66 microcontrollers with 83 instructions, 31...
Found in old documentation this circuit uses the NOR ports of 4001. The circuit has the frequency and...