2 layers77.3 × 89 mm
Panelized
avycado13/cheapoboard
See firmware/README.md for the PA0 blink example, build instructions, and SWD flashing guide.
120 parts
2 layers119 × 27 mm
Puya spinner
ArcaneNibble/puya-spinner4Puya PY32 deliberately-overengineered fidget spinner
- Size
- 119 × 27 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 52
- Nets
- 31
- Pads
- 141
- Tracks, vias
- 288, 45
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 3 Sep 2024
- Updated
- 3 Sep 2024
Overview
Puya spinner is an open-source printed circuit board by ArcaneNibble, from the ArcaneNibble/puya-spinner repository on GitHub, published under the 0BSD licence. It is a 2-layer board of 119 × 27 mm with 52 parts on 31 nets, routed with 288 tracks and 45 vias.
It is built around the PY32F002AF15P6-E, SC7A20 and AO3401A, with the CR2032 among its other parts. Its parts include 30 diodes, 8 resistors, 4 capacitors, 2 ICs and 1 transistor.
Main components
4
PY32F002AF15P6-E
TSSOP20UncategorisedPUYA
SC7A20
LGA-12_2.0x2.0x0.5P-1LGA-12(2x2x0.5) New Arrivals ROHSHangzhou Silan MicroelectronicsUncategorised
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
CR2032
-- Unclassified goods ROHSMaxellUncategorised
README
README.mdPY32 fidget spinner demo
This is a quick-and-dirty demo of just how cheap embedded compute can get nowadays — approximately USD$6 for an assembled board with a 32-bit Cortex-M0.
In order to actually make good use of this available compute, the idea was to build a modern (i.e. state-space) control theory estimator to determine the orientation of the fidget spinner from accelerometer data, rather than more traditional approaches involving hall effect sensors.
Status
Revision A was ordered from JLCPCB, and all of the essential components work.
The state estimator has yet to be written, as the author is aphantasic and not much of a shape rotator (and thus struggling with writing out the necessary "physical world" equations).
Main components
- PY32F002AL15 (MCU)
- SC7A20 (accelerometer)
- CR2032 battery
- 30 charlieplexed LEDs
Parts
52| Qty | Value | Footprint | References |
|---|---|---|---|
| 30 | RED | LED_SMD:LED_0603_1608Metric | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +14 |
| 6 | 100 | Resistor_SMD:R_0402_1005Metric | R3, R4, R5, R6, R7, R8 |
| 3 | 0.1 uF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3 |
| 2 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP1, JP2 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_2.0x2.0mm | TP1, TP2 |
| 1 | 10 uF | Capacitor_SMD:C_1206_3216Metric | C4 |
| 1 | 608 bearing | parts:fixme_608_bearing | H1 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | CR2032 | parts:Battery_MYOUNG_BS-07-A1BJ001_CR2032 | BT1 |
| 1 | Conn_ARM_SWD_TagConnect_TC2030 | Connector:Tag-Connect_TC2030-IDC-FP_2x03_P1.27mm_Vertical | J1 |
| 1 | PY32F002AF15P6 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | SC7A20 | Package_LGA:LGA-12_2x2mm_P0.5mm | U2 |
Questions
How big is the Puya spinner PCB?
It measures 119 × 27 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Puya spinner use?
52 parts, built around the PY32F002AF15P6-E, SC7A20, AO3401A and CR2032. 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 Puya spinner KiCad files?
From the ArcaneNibble/puya-spinner repository on GitHub, at the commit this page was made from: the board is puya-spinner.kicad_pcb and its schematic puya-spinner.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Puya spinner design in my own project?
Its repository publishes it under the 0BSD licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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