

Solstice
40s mods drop-in pcb for equinox
- Size
- 250.6 × 89.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 118
- Nets
- 89
- Pads
- 495
- Tracks, vias
- 691, 46
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 8 Dec 2024
- Updated
- 8 Dec 2024
Overview
Solstice is an open-source printed circuit board by matthewdias, from the matthewdias/solstice repository on GitHub, published under the MIT licence. It is a 2-layer board of 250.6 × 89.2 mm with 118 parts on 89 nets, routed with 691 tracks and 46 vias.
It is built around the ATMEGA32U4-MU and PRTR5V0U2X. Its parts include 7 capacitors, 6 resistors, 2 ICs, 2 switches and 1 connector. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2ATMEGA32U4-MU
VQFN-44-EP(7x7)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH VQFN-44-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
README
README.mdsolstice
40s mods drop-in pcb for equinox

Parts
118| Qty | Value | Footprint | References |
|---|---|---|---|
| 46 | D | Diode_SMD:D_SOD-123 | D_1, D_2, D_10, D_11, D_12, D_13, D_14, D_15, D_16, D_17, D_18, D_19, D_20, D_21, D_22, D_23 +30 |
| 36 | KEYSW | MX_Only:MXOnly-1U-NoLED | K_1, K_2, K_10, K_11, K_12, K_14, K_16, K_17, K_18, K_19, K_20, K_21, K_22, K_23, K_24, K_25 +20 |
| 6 | KEYSW | MX_Only:MXOnly-1.25U-NoLED | K_15, K_38, K_39, K_41, K_48, K_50 |
| 5 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C4, C5, C6 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R6 |
| 2 | 22 | Resistor_SMD:R_0603_1608Metric | R2, R3 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 2 | KEYSW | MX_Only:MXOnly-1.75U-NoLED | K_26, K_27 |
| 2 | KEYSW | MX_Only:MXOnly-3U-ReversedStabilizers-NoLED | K_43, K_46 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 16MHz | Crystal:Resonator_SMD_muRata_CSTxExxV-3Pin_3.0x1.1mm | Y1 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | ATmega32U4-MU | Package_DFN_QFN:QFN-44-1EP_7x7mm_P0.5mm_EP5.2x5.2mm | U2 |
| 1 | AVR-ISP-6 | random-keyboard-parts:ISP-Staggered | J1 |
| 1 | HRO-TYPE-C-31-M-12 | Type-C:HRO-TYPE-C-31-M-12-Assembly | USB1 |
| 1 | KEYSW | MX_Only:MXOnly-2.75U-ReversedStabilizers-NoLED | K_42 |
| 1 | KEYSW | MX_Only:MXOnly-2U-NoLED | K_13 |
| 1 | KEYSW | MX_Only:MXOnly-2.25U-ReversedStabilizers-NoLED | K_45 |
| 1 | KEYSW | MX_Only:MXOnly-6U-Centered-ReversedStabilizers-NoLED | K_44 |
| 1 | LOGO | random-keyboard-parts:orbit | G*** |
| 1 | PRTR5V0U2X | random-keyboard-parts:SOT143B | U1 |
| 1 | Rotary_Encoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_adjusted | SW2 |
| 1 | SW_Push | random-keyboard-parts:SKQG-1155865 | SW1 |
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Questions
How big is the Solstice PCB?
It measures 250.6 × 89.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Solstice use?
118 parts, built around the ATMEGA32U4-MU and PRTR5V0U2X. 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 Solstice KiCad files?
From the matthewdias/solstice repository on GitHub, at the commit this page was made from: the board is solstice.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Solstice 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).