Arduino - Light Sensor Triggers Relay
We are going to learn how to:
- If the light sensor's analog value is lower than a threshold, turn relay on.
- If the light sensor's analog value is greater than a threshold, turn relay off.
By connecting relay to light bulb, led strip, motor or actuator... We can use the light sensor to control light bulb, led strip, motor or actuator...
Or you can buy the following sensor kit:
|DIYables Sensor Kit 30 types, 69 units
About Relay and Light Sensor
If you do not know about relay and light sensor (pinout, how it works, how to program ...), learn about them in the following tutorials:
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- Connect Arduino to PC via USB cable
- Open Arduino IDE, select the right board and port
- Copy the above code and open with Arduino IDE
- Click Upload button on Arduino IDE to upload code to Arduino
- Radiates light to sensor
- See the change of relay's state
Read the line-by-line explanation in comment lines of source code!
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