temperature sensor relay switch circuit


Posted on Feb 7, 2014

on the desired temperature. The circuit can be used for many purposes for example switch on the fan on the desired temperature or activate emergency temperature alarm etc. The circuit can be powered by a 9 volt battery, adaptor or transformer. The two BC547B transistors are connected as a Darlington pair to increase the sensitivity or gain of the


temperature sensor relay switch circuit
Click here to download the full size of the above Circuit.

circuit. A 20K variable resistor is used to adjust the desired level of heat on which you want to activate the relay switch. Try to fit the thermistor a little bit away from the other components so it will not get their heat.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Simple strobe circuit
    Nanoampere sensing circuit
    Subwoofer Filter Circuit Using Op-Amp TL072
    long delay timer schematics
    Multimedia RIAA Preamplifier
    light gate with counter
    infrared receiver ir rx output waveform
    Frequency counter Input schematic



    Top