This project for the over-heat detector uses a 10k NTC thermistor. Circuit and working. The circuit diagram of the overheat detector is shown in Fig. 1. It is built around a negative temperature ...

Automatic Heat Detector Circuit. The second part of the circuit comprises popular IC UM3561 (a siren and machine-gun sound generator IC). It can produce the sound of a fire-brigade siren. Pin numbers ...

This infrared detector circuit uses a passive IR-detector component PID20. It converts heat radiation into electrical impulses. The output voltage of the PID20 increases when an object comes close to ...

The authors report on highly sensitive thermal infrared detectors, the result of combining the two technologies of superconducting low-T/sub c/ thin-film electronics and back-etched or 'micromachined' ...