While working in the live video industry I needed cheap Pan Tilt Zoom heads that were to be able to execute smooth movements.
We needed an acurate clock that's rack mounted, so I built one.
At my school we needed tally lights for our ATEM video switcher. Commercially available options where incredibly expensive, so I built my own.
I got bored... So I decided to learn about sorting algorithms!
At my school we needed surtitle displays for the upcoming production of Carmina Burana. This is how I built it.