Thank you all. I'm completely aware of the fact that I'm bypassing the converter by putting it on the left side of the breadboard. The main question remains: How is it possible that, when I remove the converter, so the pins/wires are all exactly at the same location as in the pictures, but then with...

There's a chance I'm missing something. Some cites from the datasheet: Interface Voltage Level : VDD*0.8-VDD+0.5V, standard CMOS level. Power Supply : DC4V-5.5V 0.2A/pcs (Maximum), for each additional panel, add another 0.2A, if voltage is less than 4V, the brightness would not be enough. If over 4 ...

Thanks for a quick reply. Ok, then I'll stop using it that way. Maybe the RPi is already damaged, and is that the reason it doesn't work anymore like this: https://dlnmh9ip6v2uc.cloudfront.net//images/products/8/7/4/5/LevelConverter-L.jpg (5V to HV and 3.3V to LV) 3 RPi pins to 3 TXI-pins on the con...

I'm trying to replace my Arduino by a Raspberry, so I can drive a 7-segment LED driver a little easier. When I connect the RPi pins directly to the CLK,DAT,DIM pins, it's not working. It's showing "random" ouput. I read that it needs 5V, so I'm now using a logic level converter. When I wire it the w...