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  • Salvaging Liquid Crystal Displays (LCDs)

    I got it to work finally, back light not yet and not sure why not working but the rest is.I managed to find the chip on it and looked it up, its same as the 16 pin that you showed but the 2 pins on the side are the 15 and 16. Any how thank you for the quick reply.

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  • Salvaging Liquid Crystal Displays (LCDs)

    Great post,I recently salvaged a keypad from an older alarm system. managed to figure out the keypad connections but the LCD eludes me. it has 14 pins( 2 rows of 7) and 2 more pins coming from side of the LCD. any idea on how to connect that one to Arduino?It would be nice to be able to use it as I was planning to build an access control system with that keypad.

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  • stanislavp4 commented on omersiar's instructable Arduino RC522 RFID Door Unlock10 months ago
    Arduino RC522 RFID Door Unlock

    Hi, first, a very good guide I must say.now I encountered a problem with the keypad I'm trying to use.I cannot figure out the matrix on it. it has 14 pins they go as followingto make 1 need pins 7 and 11 to make 2 need pins 7 and 9to make 3 need pins 7 and 5to make 4 need pins 7 and 8to make 5 need pins 3 and 11to make 6 need pins 3 and 9to make 7 need pins 3 and 5to make 8 need pins 3 and 8to make 9 need pins 1 and 11to make 0 need pins 1 and 9to make * need pins 1 and 5to make # need pins 1 and 8to make A need pins 6 and 8to make B need pins 6 and 5to make C need pins 6 and 11to make D need pins 6 and 9to make E need pins 10 and 5to make F need pins 10 and 9to make G need pins 10 and 11if you could help me with the code would be awesome

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