Circuit Project Electronic

This circuit, is basically a resistance � sensing window switch, except that the �resistor� takes the form of an NTC thermistor and the circuit thus responds to temperature. TH1 must have a resistance in the range 500ohm - 9Kohm. RV1 is used to set half � supply volts on the RV1 � TH1 junction at [...]

My Friend want circuit Temperature Monitor for control relay. I find on internet , See to This Web http://www.mitedu.freeserve.co.uk/Circuits good article circuit. The Temperature Monitor use IC LM741 or IC 301 for test Temperature control relay switch.
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Using a thermistor in the position shown makes a heat activated sensor. A change in temperature [...]

Here is Circuit power supply linear regulator. Volt output 2-30V and Current 5Amp. use IC LM317 for Circuit power supply Regulator and Transistor 2SA1186 for Boost up Current from IC LM317 (1.5A) to 5A output.
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