We found this circuit in the September 1985 issue of Radio Electronics magazine. It uses CMOS integrated circuits and is part of a larger integrated circuit test project.
This high-gain circuit uses junction FETs (JFETs) and must be powered by somewhat high voltages. The...
This circuit counts 1 per second, displaying the value in binary. The circuit is TTL and must be...
Critical components of this project are the Geiger tube and the 300V battery. The battery can be...