# First Arduino electronic project **URL:** \ **Category:** General Guidance\ **Created:** [June 5, 2026, 12:27pm UTC](https://forum.arduino.cc/t/first-arduino-electronic-project/1447279 "2026-06-05T12:27:52Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![axela06](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/axela06/32/1273873_2.png) [@axela06](https://forum.arduino.cc/u/axela06)\ **Post date:** [June 5, 2026, 12:27pm UTC](https://forum.arduino.cc/t/first-arduino-electronic-project/1447279/1 "2026-06-05T12:27:52Z")
Hello! I'm doing my first Arduino/electronic project and I'm having some troubles understanding how to do wiring and how to handle power supply First of all I have an Arduino UNO R4 Minima, and my goal is to do a simple mini game with a led strip and arcade button Here is what I bought for the project - Power supply: [5V 10A with 5.5 x 2.5mm DC Output](https://www.amazon.fr/dp/B0DM97JMVS?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1&language=en_GB¤cy=EUR) - LED strip: [WS2813 60 leds/m 2 meters](https://fr.aliexpress.com/item/1005006766819624.html?spm=a2g0o.order_list.order_list_main.72.1ad21802ApZD6m&gatewayAdapt=glo2fra) - [60mm arcade button with integrated LED](https://fr.aliexpress.com/item/1005007287738698.html?spm=a2g0o.order_list.order_list_main.34.1ad21802ApZD6m&gatewayAdapt=glo2fra) \* 3 - [Screw Shield for Arduino](https://fr.aliexpress.com/item/1005009048768625.html?spm=a2g0o.order_list.order_list_main.4.1ad21802ApZD6m&gatewayAdapt=glo2fra) - 0.75mm² wire and stripping pliers I thought I was gonna **power the LED strip** with the power supply using the **GND and 5V** cables, that would go through **2 WAGO** to also **power the Arduino** with the same power supply. The issue is that I do not understand how the cables from my LED strip are working I have 2 loose cable (GND/5V) and a 4 pins female adapter that do GND BO DO 5V: ![35696269-3620-4a46-bd8a-1280ca9c811c](https://europe1.discourse-cdn.com/arduino/original/4X/2/c/7/2c7debd62762bc91c6632b87c15653513a45ea30.jpeg) Do I need to buy an adapter for this? Since my goal is to control the LEDS using the Arduino Thanks for your help! ---
**Author:** ![kmin](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/kmin/32/1147370_2.png) [@kmin](https://forum.arduino.cc/u/kmin)\ **Post date:** [June 5, 2026, 12:55pm UTC](https://forum.arduino.cc/t/first-arduino-electronic-project/1447279/2 "2026-06-05T12:55:33Z")
> [@axela06](#): > > 4 pins female adapter that do GND BO DO 5V: They are actually BI and DI but labels are covered by heatshrink. You can use the "loose" cables and wagos to connect PSU 5V/GND to both strip and arduino. Then use jumper wire to connect DI to your arduino digital pin. ---
**Author:** ![axela06](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/axela06/32/1273873_2.png) [@axela06](https://forum.arduino.cc/u/axela06)\ **Post date:** [June 5, 2026, 1:16pm UTC](https://forum.arduino.cc/t/first-arduino-electronic-project/1447279/3 "2026-06-05T13:16:31Z")
Thanks for your answer! Just to be sure I understood 5V GND (white/red "loose" cables) connected to power supply Then out of the 4 pins adapter -\> green cable (DI) with a dupont to the Arduino (no need for resistance?) Btw thanks for the explanation I didnt understand why it was DO/BO first and not DI/BI! ---
**Author:** ![xfpd](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/xfpd/32/1120236_2.png) [@xfpd](https://forum.arduino.cc/u/xfpd)\ **Post date:** [June 5, 2026, 1:56pm UTC](https://forum.arduino.cc/t/first-arduino-electronic-project/1447279/4 "2026-06-05T13:56:59Z")
> [@axela06](#): > > need for resistance? Yes. On the "DI" (data) line. > [@axela06](#): > > 5V GND (white/red "loose" cables) connected to power supply Yes. Add an electrolytic capacitor to help with power fluctuations during "bright" colors. The values I have seen for the capacitor range from 100uF to 1000uF. I have used both and never saw a difference. Here is a generic drawing for powering a WS2812. ![image](https://europe1.discourse-cdn.com/arduino/original/4X/9/4/5/945941d008ebe299cf1fbbe3ea79a15d1da104d6.jpeg) ---
**Author:** ![Deva\_Rishi](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/deva_rishi/32/227254_2.png) [@Deva\_Rishi](https://forum.arduino.cc/u/Deva_Rishi)\ **Post date:** [June 5, 2026, 2:05pm UTC](https://forum.arduino.cc/t/first-arduino-electronic-project/1447279/5 "2026-06-05T14:05:35Z")
> [@kmin](#): > > They are actually BI and DI but labels are covered by heatshrink. Just to clarify, the B stands for Backup and the D stands for Data, I stands for Input, O stands for Output. If there is no meaningful signal on the DI, the WS2813 will choose BI as it's input signal. DO is the main output, basically the output of the current pixel, BO is the backup output and is a direct forward of the DI. If the pixel somehow breaks there will still be the incoming circuit being forwarded. These strips are great for situations where there is no easy access to the strip once mounted. ---
**Author:** ![kmin](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/kmin/32/1147370_2.png) [@kmin](https://forum.arduino.cc/u/kmin)\ **Post date:** [June 5, 2026, 6:08pm UTC](https://forum.arduino.cc/t/first-arduino-electronic-project/1447279/6 "2026-06-05T18:08:04Z")
> [@axela06](#): > > Just to be sure I understood > 5V GND (white/red "loose" cables) connected to power supply > Then out of the 4 pins adapter -\> green cable (DI) with a dupont to the Arduino (no need for resistance?) Correct. Since you use same power supply for both, you only need to wire DI from the 4-pin connector. Resistor is not strictly needed, but it can improve signal in certain situations and gives extra protection.