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I have a bunch of encoders that I got off ebay for various projects. They all have a push button shaft and 5 pins. I can get the encoder portion to work using the L, R and C pins, but I cannot get the push button to work right. I tried to plug the remaining 2 pins into an open button pair on the header but that didn't seem to work either. So can both elements of these encoders work with the Brain Jr?