On the 737-yoke there is a small “counter” with 3 digits where you can put in your flight number.

Buying one of those counters can get expensive. They can easily sell for $100-150. But then of course it is OEM from a real aircraft. Nothing beats the real deal. But on the other hand I could put $100 in to better use in the cockpit so I started looking for alternatives for my own yoke project.

I ended up on eBay where I found something with a similar function. On the real part you scroll up or down to change the numbers. On these fellars you push a + / – to change the value.

If you find these useful go to eBay or your favorite “Things from China”-store and search for “10pcs 22x8mm 0-9 Digits 8421BCD Code Pushwheel Thumbwheel Switches KM1” or part of that.

In order to mount it in my yoke I made a tube in Fusion360 that fitted the hold in my yoke when I removed the cover. At one end of the tube a squared hole made 3 of the digits fit.