diodes look ok to me... they just have them in the columns instead of the rows, and that can be switched in firmware.I'm stupid at the moment so took a second look before deleting my wrong advice above but no, they are definitely wrong. Row or column is indeed irrelevant but you can't go from one end of one diode into the other of all that come before it, all the same ends need to be connected together.
If the diodes in the first pic are being used in a switch matrix they are not connected as they should be - they are in series not parallel. See this pic by fknraiden:I just felt very stupid hahaha. I just improvised the wiring and I had the impression that I was missing something.Show Image(https://i.imgur.com/Lbw8LiH.jpg)
When connected properly the signal never goes through 2 diodes so it probably doesn't matter that they have high resistance.
Most diodes are going to be made in China (like most everything!) so that's certainly not the problem, though of course can be faulty examples of everything so you could have bad ones.
Hey, I'm on mobile so didn't check any linked resources, but it sounds like you are trying to put the LEDs in series. The typical voltage drop on a LED is between 1.7 and 3.3 V depending on the colour, so it's normal that you cannot put more than a few LEDs in series on 5 V.Thank you!! Leds are working fine!! I'm using addressable 5050 leds attached to a mini pcb from aliexpress too. Nice components for hadwiring.
The LEDs need to be wired in parallel, each with its resistor. They need to be switched on/of using a MOSFET as they will consume a few hundred mA depending on the desired brightness.
RGB diodes are essentially 3 diodes in one package - red, green and blue. You would need to control the brightness of each colour independently to get the desired colour.
If I were you I would use RGB modules with a built-in driver, like WS2812B. They only need one data pin that allows sending serial data to each module and set its colour/brightness independently.
Hope that helps at least a bit :)
The LEDs look like they could be WS2812B already, and connected right. ;) It's the diodes in the switch matrix that are connected wrong.Yes. That's true!! Rookie mistake even when I'm not that rookie. Thank you for your help!!
The rows and columns in the matrix should be uninterrupted, with a <switch and a diode> in each junction.
The switch and diode should be in series only in-between its row and column. The order of the switch and diode in series do not matter however, just as long as the diode points in the right direction.
Crud. You're right. I missed that at first.Thank you for your help anyway!!!