Hi guys, thank you for your answers...
Yes, maybe my english wasn't good to explain correctly (and sorry for that), but I mean the project of this board has intentionally 23 contacts, limiting its utilization.
Sure! I understand your point and the limitation of this old PCB. Don't get me wrong but my intention really is reuse this old board, it's fun to me. Could you give me more information about the necessary modifications?
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Thank you so much!