Led strip connection

Official Hardware UNO Family UNO R3
1

Hello, Is this connection correct?

led strip is 5v, and power suply 5v.

only need 7a, so the power suply is 10a.

I feed the arduino with the USB port
I feed the led strip with the power suply

Also, I know I have to put a capacitor and a resistor.

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2

@leiker you will need to connect the ground from the power supply to the ground on the Arduino and also I advise reading this Adafruit guide.

3

So I take out another GND cable? Otherwise everything is fine?

4

ground
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5

Yes the ground is essential

Read the link I posted it mentions a resistor and a capacitor in circuit.

I have used small pixel strings without the resistor or the capacitor and had no issues but obviously Adafruit advise those components for a reason.

6

ws2812_power_injection
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7

There will be voltage drop through the long-skinny traces in the LED strip so LEDs at the far-end may be dim or not work correctly.

Adafruit addresses this and recommends connecting power about every meter.

8

Thanks