# Customizing Digital Thumbwheel Switches

Has anyone used a Thumbwheel Switch such as these: http://www.digikey.com/product-search/en?mpart=A7D-106-1&vendor=39

I am interested in changing the internal number strip. For examples I have only found Digit based switches from 0-9, I personally would like to put my own set. I asked Digikey + Mouser techs via Chat and they said I would need a custom order from manufacturer.

Does anyone know how these work? How hard is it to create my own? Yes, I know I can use an OLED screen with two buttons and an ATtiny85 to create my own digital pushwheel switch, however, I would like a thumbwheel where the values/digits/symbols can be printed/replaced.

• We used those (or something like it) ~20 years ago. Buy one and pull it apart... I think it's just a switch plate.. base 2. How about a nice optical encoder? – George Herold Feb 17 '15 at 21:13
• There are many other types of switches. Hex and Octal are reasonably common. Some with just a + and - are available and most professional ones can be locked to a restricted range of positions to avoid over range. Placing an adhesive strip around the dial would be the easiest, just select switches that you can open and close without having to permanently damage them. – KalleMP Apr 29 '17 at 16:15

A google image search for Thumbwheel switch shows a bunch...