Detect person in front of screen

[nakita_dog]

I'm creating a wall based calendar kiosk type system and I would like to turn on the screen when someone is in front of the display or in visual range of it.

When no one is around and after a few minutes of inactivity, the screen should power down or go into screensaver mode. Maybe the default screensaver would be enough for this.

Any suggestions on how to accomplish this with minimal effort.

Also, any tutorials on how to do it would be great.

[pcmanbob]

You could certainly do the detection bit using a HC-SR04 ultrasonic range sensor.

example
https://www.modmypi.com/blog/hc-sr04-ul ... spberry-pi

there are plenty more examples on the web.

[OutoftheBOTS]

PIR sensor would also be a good way of detecting a warm body in front

[nakita_dog]

Thank you for the suggestions.