I bought a neopixel ws2812b led strip which worked perfect. It had 60 leds, which all worked great powering from an external power supply, as well as from my laptop battery for a short amount of time.
I cutted these after 10 leds between the soldering points (marked location), and they stopped working. Both the 10 leds and the 50 leds. I cutted the 50 leds to get only 1 led, 3 leds, 40 leds but these behaved similarly.
As can be seen in the images above, they only shine red light. So I thought the power was too low, so I blew up some. I think I also blew op 3 as can be seen in the last image, by putting the data line on the 5V power supply.
I checked the power, which was 5.04 V. I added a potentiometer between data of the arduino and data of the ledstrip, but without results when going from 0-5.5 Ohm.
I added in my script that only the first 3 should come on, but they don't react to it anymore. The datapin, arduino, power supply and led strips are all the same; the only difference is cutting these. Does someone have an idea what I could do more or know the reason why they don't work anymore?
Thanks in advance!!!