(Outdated) Create a long music reactive led strip - TobKra96/music_led_strip_control GitHub Wiki
Introduction
You want to create a long LED Strip for your room, or even outdoor? I'll show you how to do this and where the limits are.
Important: This tutorial is not up to date. There is a better way to do this with WS2815. The described wiring was used in this project: YouTube: Music LED Strip Control DIY (Raspberry Pi and WS2812B)
Key facts:
- 15 meters
- 900 LEDs
- outdoor compatible
- only one power source
Component List
- 3 x 5m WS2812b 60 LEDs/meter LED Strips Aliexpress BTF-Lighting
- 4 x DC DC Converer 24V to 5V (5V with at least 20A) Aliexpress s2wengao
- 24V (with at least 15A) Power Supply Aliexpress Vusum
- 1 x Raspberry Pi 3b+
- 1 x USB Sound Card Amazon Sabrent Sound Card
- 1 x Microphone Amazon Speedlink Clip On Microphone
- 220Ω Resistor
- Thick cabe (at least 4mm²) You can use speaker cables.
- 5 x Fuse Holder (with at least 20A) *optional Aliexpress fuse holder for the car
- 2 x 10A, 2 x 20A and 1 x 15A Car Fuses. *optional
Wiring diagram
Background Information
All the effort is due to the voltage drop across the LED strip. You have to feed a 5m LED strip on both sides. You would see the brightness dropping across the led strip. There are several options to do the feed of the LED strips. If you have power sockets at every end of each led strip, you can use 5V power supplies. If you want to have only one power supply, located at one spot, you have to decrease the current of the supply cord. Only with decreasing the current by using a higher voltage, the voltage drop of the cable (caused by the internal resistance of the cable) disapear.