Turn off IR sensor after probing



  • Hi,
    I would like to disable the sensor after probing, because it shines too much on a webcam.
    Can I connect IR sensor power to an output pin and control it with M42?


  • administrators

    Not directly, because the current draw of the sensor is around 10mA, which is too much for and output pins to drive directly. You would need to use a PNP transistor to switch the pin. Choose one that can take the current surge when you turn it on, e.g. BC327, and use a series resistor to the base of about 10K. Don't forget that when you turn it on, the sensor needs 5-6 seconds to initialise.

    Alternatively, can you shield the LED on the side where the webcam is?



  • Thanks David!
    Probe LEDs look away from the camera, but they still light up the part pretty much.
    I'll try your advice.


Locked
 

Looks like your connection to Duet3D was lost, please wait while we try to reconnect.