A home-made low-cost intelligent counter

A versatile low-cost intelligent counter based on the Z80 CPU, 32K RAM, and 74HCT 590 counters has been constructed with five dependent counter channels and a count capacity of up to 65536 for nuclear radiation measurement. The counter can be operated either stand alone from a built-in keyboard for automatic recycling counting or on line with a computer for remote control. The intelligent counter was successfully used in building radon monitoring where the full scope of functions and the convenience of the intelligent counter have been adequately demonstrated.<
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