I found a tally light project online here:

https://github.com/mrkeathley/obs-pi-tally

I designed my own circuits and 3D housing in Fusion 360.

The tally lights are built for OBS (Open Broadcast Software). They light up one of three LEDs. If the camera is “live” they are green, if they are “cued” they are blue and if they are “off” they are red. It’s really handy when you have many cameras all hooked up and automated views and such.

obs tally lights 1

obs tally lights 1

finished tally light circuit and 3D printed housing assembly

obs tally lights 2

obs tally lights 2

bread board testing the tally light circuit

obs tally lights 3

obs tally lights 3

circuit closeup

obs tally lights 4

obs tally lights 4

building the tally lights

obs tally lights 5

obs tally lights 5

tally light fusion 360 design of the back

obs tally lights 6

obs tally lights 6

tally light fusion 360 design of the front

obs tally lights 7

obs tally lights 7

testing the leds with the raspberry pi