Problem reading signal from 12v through beam from arduino UNO

Other Hardware Sensors
1

I want to make an 12v linear actuator to move from relay by receiving signal from my 12v through beam. i have make the connection and insert my coding however it does not work. Really hope someone view this

troubleshoot_through_beam.ino (431 Bytes)

2

The if-statement requires two '=' to compare something.
The digitalRead() function returns HIGH or LOW.

I know something like your sketch is done in this example : https://www.arduino.cc/en/Reference/DigitalRead
But that example is confusing.
This example is better : https://www.arduino.cc/en/Tutorial/Pushbutton

I suggest not to use 'val', and compare it with HIGH or LOW.

  if (digitalRead(buttonpin) == HIGH)

Please use your brackets and indents and spaces always in the same way. If you start doing that now, you will have many advantages from it.

3

oh tq sir. the sensor looking in good condition but the arduino like received nothing to charge my relay for my actuator. the sensor sense when it is block and if its not.

4

should i use arduino voltage divider considering maybe the output from through beam is the same amount of the 12v sensor i use ? its for decreasing the voltage to around 5v same to arduino ?

5

I don't know what sensor that is, but if it has a 12V output, then you have to use two resistors to lower the voltage.
https://learn.sparkfun.com/tutorials/voltage-dividers
Choose 15k for R1 and 10k for R2.
When the input is 12V the output will be 4.8V.

6

okayy tq very much sir . I will try your solution :wink: