crwdns2935425:07crwdne2935425:0
crwdns2931653:07crwdne2931653:0
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Here are some pictures of the PCB. It has 3 IC chips with the main one reading CP6604BM, and the smallest one being from Texas Instruments.(The optical sensor is underneath a piece of plastic)
crwdns2944171:0crwdnd2944171:0crwdnd2944171:0crwdnd2944171:0crwdne2944171:0