NASA NTRS · 19870000512
Temperature-Controlling Circuit
Abstract
Simple circuit switches current to electrical heater on and off to maintain temperature of room at 25 plus or minus 0.5 degree C. Lightweight, compact, reliable, insensitive to electrical noise, and uses single 5-Vdc power supply. Handles ac loads of 10 A. Designed to operate outside temperature controlled environment over range of -55 to +85 degree C. Thermistor provides input signal for simple temperature controller. Output of controller applied to solid-state relay, which in turn switches current to resistance heater.
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Temple, Gerald. 1987-11-01. Temperature-Controlling Circuit. https://ntrs.nasa.gov/citations/19870000512
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