This circuit was found in a 1964 Electronic Design. The transistors are of the time, but can be employed as modern equivalents. The system is for car with contact breaker.
This circuit is from a Popular Electronics from 1993. The magazine is no longer printed, but the...
August 2017 - The PIC32MM microcontrollers of the Microchip 32-Bit Family can be obtained from...
This circuit was found in documentation from the 90s. Its purpose is to dial a programmed number...