Motion activated midi

d_moss · 2023-11-27T21:01:50.669Z

Greetings

I’m curious if anyone has any experience with motion activated midi signals? I’ve seen individuals use video to midi, but I have something a bit simpler in mind.

I have a concept for an installation in a pedestrian tunnel that has natural reverb. I want to install some triggers that would be activated by someone walking in front of it - and then for that to trigger a midi note.

Would anyone be able to pour me in the right direction for sensors?

Thank you

graymazes · 2023-11-27T21:08:36.637Z

i’d probably try an IR break-beam sensor, extremely cheap and simple

adafruit.com

IR Break Beam Sensors with Premium Wire Header Ends - 3mm LEDs

Infrared (IR) break-beam sensors are a simple way to detect motion. They work by having an emitter side that sends out a beam of human-invisible IR light, then a receiver across the way ...

Price: $2.95 USD

… mm, actually looks like these tiny ones won’t cut it at the range you need, but that’s just a question of cost and power really.

… here’s a project where someone assembles a longer-range system from separate IR receiver and emitter (+reflector), with an arduino controlling beam modulation and hysteresis:

Hackster.io

Long Range Beam Break Sensor with Reflector Panel

A cheap beam break sensor utilising a reflector panel instead of a transmitter / receiver setup. Capable of handling long distances. By mova.

d_moss · 2023-11-27T21:36:55.989Z

The tunnel width is under 6 feet - so probably the ones with the 150cm range would work.

Thanks for the help!

monopole · 2023-11-29T12:21:07.416Z

This would give you 10m and uses 5V. It’s very directional so It’s trickier to align but should have less false positives
https://aliexpress.com/item/4000630258473.html