Timeline for Is my 8x8 led matrix module broken?
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 26, 2023 at 4:06 | history | bumped | Community Bot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Apr 18, 2023 at 3:57 | answer | added | user90007 | timeline score: 1 | |
| Jan 30, 2021 at 14:30 | comment | added | Gerben | In that case there is a problem with your matrix module. | |
| Jan 30, 2021 at 0:36 | comment | added | Gil | VCC, Ground, and Din are connected together per your frizzy drawing. This cannot be as the leds light. A schematic, of what you have, would be much easier to read and follow. The information all we can do is take a SWAG at it. FYI the Frizzy thing at circuit IO has the same problem. | |
| Jan 29, 2021 at 18:27 | comment | added | Dan Forever | @Gerben - Plugging in just VCC and GND still results in the same pattern | |
| Jan 29, 2021 at 18:26 | comment | added | Dan Forever | So I've tried wiring the MAX7219 chip up myself following this as a guide: wayoda.github.io/LedControl/pages/hardware I only wired up the first column because my breadboard is only so big (plus, I just need to see what's up) I seemed to have the exact same problem with the example code from circuito.io, but - when I loaded up the LCDemoMatrix example, which uses the wayoda.github.io/LedControl library instead, it works! I'm not sure what was wrong with the first demo I used, possibly the modification I used to just turn on a single led was wrong. | |
| Jan 29, 2021 at 14:13 | comment | added | Gerben | What happens if you only connect Vcc and GND to the module? Could you post a photo of the underside of the module? It might be a bad solder connection. Try wiggling all the connections to make sure they make proper contact. I've had breadboards that sometimes didn't make a proper connection with the wires that I inserted. | |
| Jan 29, 2021 at 14:04 | comment | added | Peter Paul Kiefer | Some guesses: The module is not correctly wired. Show a picture where I can see the connections, the arduino and the matrix completely then, I could check it for you. - A wire is broken. I think you have checked this already. -- The Module is broken. That's possible!. Have you a second one to try? The chip seems to be replacable. Have you another MAX7219 chip to replace it? -- You could have a typo in the code, by accident: add your code (ino-file; the one you use) to the question. I would check that for you. | |
| Jan 29, 2021 at 13:39 | comment | added | Dan Forever | @PeterPaulKiefer Yes I did, I also tried adding an option that would simply clear the screen (to no effect) | |
| Jan 29, 2021 at 12:32 | comment | added | Peter Paul Kiefer | Did you open a serial monitor and choose an option? The code waits for input over the serial connection. | |
| Jan 29, 2021 at 11:41 | review | First posts | |||
| Jan 29, 2021 at 11:45 | |||||
| Jan 29, 2021 at 11:33 | history | asked | Dan Forever | CC BY-SA 4.0 |