# Using PIR sensor to activate a video thats being played through projector **URL:** \ **Category:** General Guidance\ **Created:** [July 15, 2015, 12:19pm UTC](https://forum.arduino.cc/t/using-pir-sensor-to-activate-a-video-thats-being-played-through-projector/324042 "2015-07-15T12:19:37Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![jenky12](https://avatars.discourse-cdn.com/v4/letter/j/e95f7d/32.png) [@jenky12](https://forum.arduino.cc/u/jenky12)\ **Post date:** [July 15, 2015, 12:19pm UTC](https://forum.arduino.cc/t/using-pir-sensor-to-activate-a-video-thats-being-played-through-projector/324042/1 "2015-07-15T12:19:37Z")
I am currently undertaking a project of my own and I have very little to no experience with Arduino. What I want to do is to use a projector in the ceiling which will play a short video when activated, I want the trigger to be a PIR sensor so when someone walks past the video will start playing. I was wondering how I would go about doing this because I have no coding knowledge either? Being new to Arduino I don't really know what I'm doing to be honest Thanks ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [July 15, 2015, 12:22pm UTC](https://forum.arduino.cc/t/using-pir-sensor-to-activate-a-video-thats-being-played-through-projector/324042/2 "2015-07-15T12:22:08Z")
Does the device have to switch on both the projector and the video player? You could probably do this by emulating the IR signals for the devices in question. ---
**Author:** ![jenky12](https://avatars.discourse-cdn.com/v4/letter/j/e95f7d/32.png) [@jenky12](https://forum.arduino.cc/u/jenky12)\ **Post date:** [July 15, 2015, 12:34pm UTC](https://forum.arduino.cc/t/using-pir-sensor-to-activate-a-video-thats-being-played-through-projector/324042/3 "2015-07-15T12:34:13Z")
Yes I needs to switch the projector on and play the video, this might be a silly question but whats an IR signal, would you have come across any tutorials or anything like that concerning this sort of project? Thanks ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [July 15, 2015, 12:54pm UTC](https://forum.arduino.cc/t/using-pir-sensor-to-activate-a-video-thats-being-played-through-projector/324042/4 "2015-07-15T12:54:51Z")
IR is infra-red (a shorter wavelength than that detected by the PIR) used for common remote controls. "Ken Shirriff" "IR" and "Arduino" are useful google search terms. ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [May 5, 2021, 5:33pm UTC](https://forum.arduino.cc/t/using-pir-sensor-to-activate-a-video-thats-being-played-through-projector/324042/5 "2021-05-05T17:33:28Z")