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February 10, 2013
about 3 years ago
Has anyone experience the same kind of trouble??
I am able to control every led except the 4 wired to LEDGnd4. So i presumed one of my solder or wiring was wrong but when i test:
all the LEDS (SINGLE COLOUR) anode are connected to each other, same for the cathode. One is wired to the ground correctly ( exact same configuration as for other LEDGndX ).
i’m sure my leds are connected properly and my testings are the same for every LedGnd.
Could it be a manufacturing problem inside the circuit??
I also have a few problem to figure out how to detect the button pressed. The only solution i came up with is:
putting all the “SWITCH” (rows) to +3,3 or 5v. And do some digital reading on the SWITCH GND. When a SWITCH GND is detected as HIGH, it means a certain column has been pressed. But unfortunately we miss the row information this way.
How are we suppose to handle the “switch” pins and the “switch gnd” at the same time?
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