Heat Sensor Circuit And Working Operation

The light sensor circuit is an electronic circuit designed using light sensor ldr darlington pair relay diode and resistors which are connected as shown in the light sensor circuit diagram.

Heat sensor circuit and working operation.

The principle of operation of heat detector circuit. A 230v ac supply is provided to the load in this case the load is represented with a lamp. The main property of a heat sensor is to sense the heat which is present around the sensor. The usage of the heat sensor circuit is inside your pc or in your kitchen.

A simple heat detector circuit is shown in the figure that can be used as a heat sensor. You also note that before start testing the circuit first set the variable resistor. We can also use buzzer in place to led. In this heat detector circuit diagram a potential divider circuit is formed with a series connection of thermistor and 100 ohms resistance.

When the set value of the temperature is high then it is indicated with the help of a glowing led. The o 2 sensor s heater circuit is controlled in one of two ways. First is the positively controlled type of circuit. Light sensor circuit working operation.

Usually the heater circuit in this case is controlled by a relay. Working of the circuit is simple when there is heat or increase in temperature to the level where it crosses the threshold set by pot then the collector current increase and led starts illuminating slowly.