Ok, well, back to basics then. Clearly something is missing.
Incidentally, those consoles seem to be selling for a lot on eBay. You could sell what you have and build your own custom keypad from scratch. You could use the same technique that we have been looking at, or use a matrix.
Anyway, I'm happy to persevere if you are.
I wonder if you could take a clear photo square-on of the front and back of the board? I could try tracing the tracks and cross-referencing it with what we have so far. You'd have to post it to Imgur or Google drive or something because you can't post large files here. You might also try looking lighting it from the side or at an angle to highlight the traces, otherwise they are hard to see due to the black solder mask.
I'm still convinced it's just a shift register, but I don't know what the hex inverter is for. I'm also suspicious of the shift register not working at 3.3V. maybe we should get something to drop the output voltage and run the whole board at 5V.
Do you have any components, such as resistors, transistors, etc. to hand? Do you have an Arduino to hand?
Incidentally, those consoles seem to be selling for a lot on eBay. You could sell what you have and build your own custom keypad from scratch. You could use the same technique that we have been looking at, or use a matrix.
Anyway, I'm happy to persevere if you are.
I wonder if you could take a clear photo square-on of the front and back of the board? I could try tracing the tracks and cross-referencing it with what we have so far. You'd have to post it to Imgur or Google drive or something because you can't post large files here. You might also try looking lighting it from the side or at an angle to highlight the traces, otherwise they are hard to see due to the black solder mask.
I'm still convinced it's just a shift register, but I don't know what the hex inverter is for. I'm also suspicious of the shift register not working at 3.3V. maybe we should get something to drop the output voltage and run the whole board at 5V.
Do you have any components, such as resistors, transistors, etc. to hand? Do you have an Arduino to hand?
Statistics: Posted by ame — Sun May 19, 2024 9:15 pm