Circuit diagram of ir sensor. A flex sensor is a transducer which changes its resistance when its shape is changed. In this article we are going to interface the sensor in both modes. The light sensor circuit is a simple electrical circuit which can be used to control the switch on and off electrical load appliances like lights fans coolers air.
In this project the transmitter section includes an ir sensor which transmits continuous ir rays to be received by an ir receiver module. In our day to day life we got used to implement different different types of sensor circuits using various types of sensors such as ir sensors temperature sensor pressure sensor pir sensor and so onfrequently we observe pir sensor circuit based automatic door opening system ldr sensor circuit based automatic street light system piezoelectric sensor circuit based power generation. Motion detector circuit explanation.
What is a light sensor circuit. In this tutorial we are going to interface flex sensor with atmega8 microcontroller. Ic op amp lm358m as a voltage comparator lm358m is a general purpose dual operational amplifier op amp.
Knowing the working of an op amp here is really of no use to us as we are not using it as an amplifier as such so we will only be talking about how we use it here in the ir sensor circuit what it does but not much about how it does it. The figures below are showing two different light sensor circuits. Lm358 ic 2 ir transmitter and receiver pair.
A photo relay or light activated relay is a circuit which opens and closes the relay contacts according to the lighthere a photo diode is used to sense the lightthe photo diode offers a high resistance when there is no light falling on ithere the photo diode is connected in reverse biased conditionthe only current flowing through it will be due to the minority carrierswhen. Remote control light circuit diagram using 555 timer gallery of electronic circuits and projects providing lot of diy circuit diagrams robotics microcontroller projects electronic development tools. This sensor measures the volumetric content of water inside the soil and gives us the moisture level as output.
The circuit shown in figure 1 is a very simple light sensor circuit that will activate an led when the ldr in the circuit receives light. Led light emitting diode. There are different types of sensors such as light sensors temperature sensor humidity sensor pressure sensor fire sensor ultrasonic sensors ir sensor touch sensor and so on.
The sensor is equipped with both analog and digital output so it can be used in both analog and digital mode. In atmega8 we are going use 10bit adc analog to digital conversion feature to do this job.