This circuit uses uncommon Texas Instruments components today. The circuit is from an American documentation. Transistors are commonly used PNP. The display is 7 segment multiplexed.
This is a project from a 1987 publication. The circuit tests transistors without removing them...
This MW radio circuit with varicap tuning was found in an English documentation from 1989. The...
This circuit uses an infrared remote-control sensor found on televisions. The circuit can control...