2 layers332.8 × 314.5 mm
PCB PCB Smile36ARMultiLayermcupads 2023-04-30
protieusz/Smile36-PCB-Version
Converted From Handwire To PCB Using EasyEDA & sponsored by PCBWay
86 parts22
2 layers30 × 30 mm
SoundMixer
LeKoYa/SoundMixer41A deej-powered Soundmixer for individual volume control with rotary encoders, leds, buttons and oled support
- Size
- 30 × 30 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 41
- Nets
- 36
- Pads
- 139
- Tracks, vias
- 233, 12
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 6 Jul 2025
- Updated
- 11 Jul 2025
Overview
SoundMixer is an open-source printed circuit board by LeKoYa, from the LeKoYa/SoundMixer repository on GitHub, published under the MIT licence. It is a 2-layer board of 30 × 30 mm with 41 parts on 36 nets, routed with 233 tracks and 12 vias.
It is built around the XL-1010RGBC-WS2812B-DZ and PEC11R-4015F-S0024. Its parts include 25 ICs, 6 resistors, 4 capacitors, 1 connector and 1 switch.
Main components
2README
README.mdSoundMixer
A deej-powered Soundmixer for individual volume control with rotary encoders, leds, buttons and oled support. I've also made an enclosure that is supposed to be mounted below a table.
This is still an early version and rebuilding your own might become very tricky. I am actively working on a second version that will be easier to build and assemble.
Hardware
The soundmixer uses the following things:
- Arduino nano
- 5x Custom PCBs with 25 ws2812 LEDs and rotary encoder
- 1x 1.3" i2c oled screen (ssd1306)
- 2x mx-switch
- 2x pull-up resistors
- A lot of cables
LED-PCB
For the LEDs i've designed a custom pcb with a size of 3x3cm. On the front side are 25 1010 ws2812 LEDs, neatly arranged around a rotary encoder (PEC11R-4015F-S0024). The backside features some capacitors and resistors used mainly for the encoder. It also features a small 7-pin molex picoblade connector due to the limited space.
The pcb was designed in kicad. I am still working on a version2 that features two pcbs stacked on top of each other, so the encoder does not stick out too far above the leds.
Enclosure
The entire enclosure is 3d-printed, mainly in PLA. The diffusers in front of the led rings are made out of translucent PETG. The parts are screwed together with some M2.5 screws.
Software
PC Side
On the pc side, it uses a fork of the original deej project found here.
Arduino Side
For the arduino i wrote my own firmware (see the software folder), with the help of platformio using some arduino libraries.
Parts
41| Qty | Value | Footprint | References |
|---|---|---|---|
| 25 | XL-1010RGBC-WS2812B | easyeda2kicad:LED-SMD_4P-L1.0-W1.0-TL_XL-1010RGBC-WS2812B | U1, U2, U10, U11, U12, U13, U14, U15, U16, U17, U18, U19, U20, U21, U22, U23 +9 |
| 5 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R5, R6 |
| 4 | MountingHole | MountingHole:MountingHole_2.7mm_M2.5 | H1, H2, H3, H4 |
| 3 | 0.01uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3 |
| 1 | 1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 4.7uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | Conn_01x07 | easyeda2kicad:Molex_PicoBlade_53047-0710_1x07_P1.25mm_Vertical | J1 |
| 1 | PEC11R-4015F-S0024 | easyeda2kicad:SW-TH_PEC11R-4XXXF-SXXXX | SW1 |
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Questions
How big is the SoundMixer PCB?
It measures 30 × 30 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SoundMixer use?
41 parts, built around the XL-1010RGBC-WS2812B-DZ and PEC11R-4015F-S0024. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the SoundMixer KiCad files?
From the LeKoYa/SoundMixer repository on GitHub, at the commit this page was made from: the board is Hardware/led-pcb/SoundMixer.kicad_pcb and its schematic Hardware/led-pcb/SoundMixer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SoundMixer design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).