For Terrain Command II and III – all you need to make your own buttons or adapt other than Carpe Iter buttons. If you want to just adapt other mechanical pushbuttons you might already have, no need to buy the push-buttons from us – just get the Terrain Command III electronics and the cable(s). If you use other than our pushbuttons, you can use any kind of low voltage mechanical momentary pushbutton or toggle.

Pin-out and wiring plan in the gallery. It is the same pin-out we use to make the Carpe Iter original buttons. If something will not work with your DIY buttons, please do not ask for support – we have no way of knowing what you messed up (use multimeter beeper function to make sure that you are getting signals on correct pins).