Digital Thermometer Circuit Using Ic 741. Diy digital thermometer circuit p. The thermistor th1 is an arm of bridget s changing values.
Operational amplifier ic 741 ic3 provides a constant flow of current through the base emitter junction of npn transistor bc108 t1. Circuit diagram of electric thermometer using op amp 741. You can use silicon diode instead of transistor.
Operational amplifier ic 741 ic3 provides a constant flow of current through the base emitter junction of npn transistor bc108 t1.
The 741 op amp ic is used as the difference amplifier. The thermistor th1 is an arm of bridget s changing values. How the digital thermometer works. The temperature is read on a 1v full scale deflection fsd moving coil voltmeter or digital voltmeter.
