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Connecting keypad to explorer16 demo board.

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Encon

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explorer16 keypad

Can i solder this keypad to explorer 16 DB. ?

I am asking this because, i need to make code lock and this is the keypad schematics that i have to use. I can not change hardware settings.

I made one test program and its not working but if i use the same program on switch/button based on explorer16 demo board, then all of them are working fine.
SW4,5,6.

Then, the problem must be in the soldering.
The chip is PIC24FJXXX.

Please share some advice!
 

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