8x8 LED Matrix hardware problems
I am taking an introductory robotics course, and for the next homework assignment I need to use an 8×8 LED matrix. My issue is that I followed the wiring diagram from the laboratory, but it doesn’t seem to work properly.
In the lab, we had to wire the matrix after identifying its polarity. The lateral marking (indicating whether it is BS or AS) was erased on mine, so I used a multimeter to test it, and it appeared to be a common-cathode matrix. I then followed the common-cathode wiring multiple times, but nothing worked—no LED would light up.
Out of desperation, I tried wiring it as a common-anode matrix instead, and this time all the LEDs turned on at once. The code still doesn’t do anything; the LEDs remain fully lit. At least I assume this means the matrix is actually common-anode, right?
I’ve also attached three pictures—the driver connections, the BS connections, and the AS connections (the one in the schema)—to give you an idea of what I’m working with.
I would be very grateful if someone could help me figure this out.
In the lab, we had to wire the matrix after identifying its polarity. The lateral marking (indicating whether it is BS or AS) was erased on mine, so I used a multimeter to test it, and it appeared to be a common-cathode matrix. I then followed the common-cathode wiring multiple times, but nothing worked—no LED would light up.
Out of desperation, I tried wiring it as a common-anode matrix instead, and this time all the LEDs turned on at once. The code still doesn’t do anything; the LEDs remain fully lit. At least I assume this means the matrix is actually common-anode, right?
I’ve also attached three pictures—the driver connections, the BS connections, and the AS connections (the one in the schema)—to give you an idea of what I’m working with.
I would be very grateful if someone could help me figure this out.
