• Test on PrefBoard

    Malhar Deshmukh • 04/25/2016 at 04:08 • 0 comments

    I built the circuit on a prefboard. Works nicely. Keys in bottom row don't work. All print 'D' when pressed. Need to see what's wrong.

    Still using old resistor values. Ill change resistors when order reaches me. Photos of build posted. Other side of board will be posted when it arrives on my OneDrive.

  • First test

    Malhar Deshmukh • 04/24/2016 at 16:37 • 0 comments

    Tested with 5.1K row resistor and 1K column resistor

    Result:

    keys 1 to 9 work. As we move to down right corner, the stability decreases. May need to tweak resistor values.