2 layers41.4 × 41.9 mm
Earring
sequoia-hope/ultraroute
PCB autorouting experiments around copperroute: route jobs, leaderboards, board morphing
105 parts1MIT
2 layers136.7 × 136.7 mm
Helixloop
starduststorm/helixloop2PCB designs and code for a wreathed-spirals LED design with a self-contained controller
- Size
- 136.7 × 136.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 449
- Nets
- 795
- Pads
- 2,462
- Tracks, vias
- 2,646, 568
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 8 Sep 2022
- Updated
- 25 Sep 2026
Overview
Helixloop is an open-source printed circuit board by starduststorm, from the starduststorm/helixloop repository on GitHub. It is a 2-layer board of 136.7 × 136.7 mm with 449 parts on 795 nets, routed with 2,646 tracks and 568 vias.
It is built around the RP2040, USBLC6-2P6 and SK9822-EC20. Its parts include 369 diodes, 49 capacitors, 8 resistors, 4 ICs and 3 connectors. It belongs with the RP2040 boards of this library.
Main components
3
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
USBLC6-2P6
SOT-666-6-40℃~+125℃ 150nA 17V 2 3.5pF 5.25V 5A@8/20us 6V ESD IEC 61000-4-2 Unidirectional SOT-666-6 ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)SK9822-EC20
SMD,2x2mm-40℃~+80℃ 0.65mm 100mcd~300mcd 1mA 200V 2mm 2mm 300mcd~500mcd 4.5V~5.5V 400mcd~700mcd 460nm~470nm 4kHz 520nm~530nm 620nm~625nm Top-mount SMD,2x2mm RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
Parts
449| Qty | Value | Footprint | References |
|---|---|---|---|
| 369 | SK9822-EC20 | helixloop:LED-SK9822-EC20 | D1, D10, D11, D100, D101, D102, D103, D104, D105, D106, D107, D108, D109, D110, D111, D112 +353 |
| 30 | 10uF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C10, C11, C12, C13, C14, C15, C29, C36, C37, C38, C39, C40 +14 |
| 13 | 100nF | Capacitor_SMD:C_0402_1005Metric | C16, C17, C18, C19, C20, C21, C22, C23, C24, C25, C26, C32, C35 |
| 7 | MountingHole | MountingHole:MountingHole_2.5mm | H1, H2, H3, H3, H4, H5, H6 |
| 4 | 1uF | Capacitor_SMD:C_0402_1005Metric | C27, C28, C33, C34 |
| 3 | TouchPoint | helixloop:TouchPoint | TP1, TP2, TP3 |
| 2 | 12pF | Capacitor_SMD:C_0402_1005Metric | C30, C31 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R10, R15 |
| 2 | 27 | Resistor_SMD:R_0402_1005Metric | R8, R9 |
| 2 | 5.11K | Resistor_SMD:R_0402_1005Metric | R6, R7 |
| 1 | 10k DNF | Resistor_SMD:R_0402_1005Metric | R20 |
| 1 | 12MHz | Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm | Y6 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric | R13 |
| 1 | Conn_01x03_Socket | helixloop:MinimalPinSocket_1x03_P1.27mm_Vertical | J7 |
| 1 | Conn_01x04_Socket | helixloop:MinimalPinSocket_1x04_P1.27mm_Vertical | J9 |
| 1 | G*** | helixloop:spiraldrawing | svg2mod |
| 1 | LOGO | helixloop:sds200200 | G*** |
| 1 | QSPI Flash | helixloop:USON_3X2_WIN | U10 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U7 |
| 1 | RT9078 | Package_DFN_QFN:OnSemi_XDFN4-1EP_1.0x1.0mm_EP0.52x0.52mm | U9 |
| 1 | SW_Push | helixloop:KEY-SMD_L3.0-W2.5-LS4.0 | SW6 |
| 1 | T3902 | helixloop:MIC_T3902 | MIC6 |
| 1 | USBLC6-2P6 | Package_TO_SOT_SMD:SOT-666 | U6 |
| 1 | USB_C_Receptacle | helixloop:USB-SMD_USB-TYPE-C-020 | J6 |
The 448 most common of 449 parts.
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Questions
How big is the Helixloop PCB?
It measures 136.7 × 136.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Helixloop use?
449 parts, built around the RP2040, USBLC6-2P6 and SK9822-EC20. 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 Helixloop KiCad files?
From the starduststorm/helixloop repository on GitHub, at the commit this page was made from: the board is board/helixloop.kicad_pcb and its schematic board/helixloop.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Helixloop design in my own project?
Its repository states no licence, so its author keeps all rights: ask starduststorm before reusing the design.