4 layers62.1 × 83.8 mm
Ss main board
loopj/short-stack
World's Smallest Nintendo Wii, using a trimmed motherboard and custom stacked PCBs
69 parts804
2 layers18 × 36 mm
Sandy
IHyperspaceI/SandyKeychain LED Matrix with ATTiny1616
- Size
- 18 × 36 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 78
- Nets
- 24
- Pads
- 196
- Tracks, vias
- 229, 91
- Pours
- 325
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 14 May 2026
- Updated
- 11 Oct 2026
Overview
Sandy is an open-source printed circuit board by IHyperspaceI, from the IHyperspaceI/Sandy repository on GitHub. It is a 2-layer board of 18 × 36 mm with 78 parts on 24 nets, routed with 229 tracks and 91 vias.
It is built around the ATTINY1616-MN, LSM6DSVE and XC6206P332MR-G. Its parts include 56 diodes, 11 resistors, 5 capacitors, 3 ICs and 1 connector. It belongs with the lEDs and displays boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATTINY1616-MN
QFN-20-EP(3x3)-40℃~+105℃ 1.8V~5.5V 10bit 16KB 18 20MHz 256Byte 2KB 8 Bit 8bit AVR Built-in FLASH QFN-20-EP(3x3) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
LSM6DSVE
LGA-14L(2.5x3)-40℃~+85℃ 1.71V~3.6V 2.6uA 4.5KB IMU SPI、I2C、I3C X,Y,Z X,Y,Z ±16g ±4000dps LGA-14L(2.5x3) Accelerometers ROHSSTMicroelectronicsAccelerometers
XC6206P332MR-G
UncategorisedUnknown maker
README
README.mdATTiny works but needs redesign as ground pours are not connected. Hence, the IMU does not get power. The focus on small packaging led to certain compromises in layout, ultimately bringing the project's downfall.
Unfortunately, KiCAD was not configured to highlight isolated GNDs, and this oversight led to the issues.
Top Layer:
Bottom Layer
Parts
78| Qty | Value | Footprint | References |
|---|---|---|---|
| 56 | Green | PCM_JLCPCB:D_0603 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +40 |
| 8 | 22Ω | PCM_JLCPCB:R_0603 | R3, R4, R5, R6, R7, R8, R9, R10 |
| 3 | 100nF | PCM_JLCPCB:C_0402 | C1, C3, C4 |
| 2 | 1uF | PCM_JLCPCB:C_0402 | C2, C5 |
| 2 | 4.7kΩ | PCM_JLCPCB:R_0402 | R1, R2 |
| 1 | 10kΩ | PCM_JLCPCB:R_0402 | R11 |
| 1 | ATtiny1616-M | Package_DFN_QFN:VQFN-20-1EP_3x3mm_P0.4mm_EP1.7x1.7mm | U1 |
| 1 | Battery_Cell | Battery:BatteryHolder_Keystone_3092_Fucked_1.6x16mm | BT1 |
| 1 | Conn_01x04_Socket | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | LSM6DSVE | Package_LGA:LGA-14_3x2.5mm_P0.5mm_LayoutBorder3x4y | U3 |
| 1 | SolderJumper_3_Open | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | XC6206P332MR-G | Package_TO_SOT_SMD:SOT-23-3 | U2 |
Questions
How big is the Sandy PCB?
It measures 18 × 36 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sandy use?
78 parts, built around the ATTINY1616-MN, LSM6DSVE and XC6206P332MR-G. 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 Sandy KiCad files?
From the IHyperspaceI/Sandy repository on GitHub, at the commit this page was made from: the board is Sandy.kicad_pcb and its schematic Sandy.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sandy design in my own project?
Its repository states no licence, so its author keeps all rights: ask IHyperspaceI before reusing the design.
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