Hi, complete Arduino newbie. I’m building an LED matrix which can connect by Bluetooth to phones, which allows people to play Tetris on the board.
My problem is, every 2-3 times I plug my matrix into a power supply, the wire connecting the board to V+ on the power supply sparks a little, then the first LED has to be replaced for some reason.
I’ve wired 200 leds (20x10) exactly like this video: Make your own 10x10 LED Matrix - YouTube (4:09 onwards), with four wires connecting the first LED to the power supply + the Arduino (one 5v and GND to the power supply, and Data In and GND to the Arduino, and the Data In is connected to a 220 Ohm resistor).
I’m using a 5v20A power supply, and these lights: Amazon.com
I’m very frustrated as I’ve had to fix this matrix about 5 times, and I don’t know what’s wrong. Thank you!