Make sure that you use one that actually supports 4 wires/lanes. You should always disconnect the board from USB before unplugging and plugging in TRRS cables, or you can short the controller, or worse.Īnother option is to use phone cables (as in, old school RJ-11/RJ-14 cables). However, since one of the wires carries VCC, this means that the boards are not hot pluggable. These provide 4 wires, making them very useful for split keyboards, and are easy to find. The most commonly used connection is a TRRS cable and jacks. If you want to use I 2C to communicate between halves, you will need a cable with at least 4 wires and 2x 4.7kΩ pull-up resistors. Required HardwareĪpart from diodes and key switches for the keyboard matrix in each half, you will need 2x TRRS sockets and 1x TRRS cable.Īlternatively, you can use any sort of cable and socket that has at least 3 wires. This assumes that you're using two Pro Micro-compatible controllers, and are using TRRS jacks to connect to two halves.
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