SnowBackpack
About the SnowBackpack PCB
SnowBackpack is an open source PCB design by wandering-nora, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 39.6 × 18 mm, with 62 components from 35 distinct parts.
Other key parts include the ESP8685H4, USBLC6-2P6, TPS61299DRLR, ME6211C33M5 and TP4054_C668215. By type, the board carries 20 capacitors, 19 resistors, 8 ICs, 5 inductors, 3 diodes and 2 transistors.
It belongs with the displays & leds, power & battery and iot & wireless designs in this gallery.
From the project
A little driver for SnowPixel displays
This board can power a grid of 2+ SnowPixel displays without any wiring in a thin package.
The main features are: - ESP8685H4 RISC-V mcu with 4MB of flash, Wifi and BLE @160MHz - Battery charging for protected 1s lipo cells - ST LSM6DSO 6-axis low power accelerometer - Efficient 5V boost converter with 500mA max current for the SnowPixel modules - Onboard ceramic antenna
Main components on the SnowBackpack
SnowBackpack bill of materials (BOM)
62 components, 35 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP8685H4 | QFN-28_L4.0-W4.0-P0.40-TL-EP2.7 | U1 |
| 1 | USBLC6-2P6 | SOT-666 | U2 |
| 1 | TPS61299DRLR | SOT-563-6_L1.6-W1.2-P0.50-LS1.6-BL | U3 |
| 1 | ME6211C33M5 | SOT-23-5 | U4 |
| 1 | TP4054_C668215 | TSOT-23-5_L2.9-W1.6-P0.95-LS2.8-BR | U5 |
| 1 | AFC08-S02QCA-00 | CONN-SMD_2P-P0.80_JUSHUO_AFC08-S02QCA-00 | U7 |
| 1 | LSM6DSOWTR | LGA-14L_L3.0-W2.5-P0.50-TL | U8 |
| 1 | TYPEC-304A-ACP16L | USB-C-SMD_XUNPU_TYPEC-304A-ACP16L | U11 |
| 1 | BSS138 | SOT-23 | Q1 |
| 1 | IRLML6401 | SOT-23 | Q2 |
| 1 | HD 7E040000M01 | CRYSTAL-SMD_4P-L1.6-W1.2-BL | Y1 |
| 1 | Ceramic | CW324S | AE1 |
| 1 | 1A | Fuse_0402_1005Metric | F1 |
| 1 | 2A | Fuse_0402_1005Metric | F2 |
| 1 | SW_Push | KEY-SMD_B3U-1000PM | SW1 |
| 1 | LED | LED_0603_1608Metric | D1 |
| 1 | KLXES15AAA1 | D_0402_1005Metric | D2 |
| 1 | RB161QS-40T18R | D_0402_1005Metric | D4 |
| 1 | 24n | L_0402_1005Metric | L1 |
| 1 | 2n | L_0402_1005Metric | L2 |
Show 15 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 2.7n | L_0402_1005Metric | L3 |
| 1 | 1u | IND-SMD_L2.5-W2.0 | L4 |
| 1 | 8.2n | L_0402_1005Metric | L5 |
| 2 | 22p | C_0402_1005Metric | C1, C20 |
| 5 | 1u | C_0402_1005Metric | C2, C4, C9, C18, C19 |
| 1 | 10n | C_0402_1005Metric | C3 |
| 5 | 100n | C_0402_1005Metric | C5, C6, C7, C8, C10 |
| 4 | 10u | C_0402_1005Metric | C11, C14, C15, C16 |
| 2 | 1.8p | C_0402_1005Metric | C12, C13 |
| 1 | 220n | C_0402_1005Metric | C17 |
| 1 | 330 | R_0402_1005Metric | R1 |
| 13 | 10k | R_0402_1005Metric | R2, R3, R5, R6, R7, R12, R13, R14 +5 |
| 1 | 5k | R_0402_1005Metric | R4 |
| 2 | 0 | R_0402_1005Metric | R8, R9 |
| 2 | 5.1k | R_0402_1005Metric | R10, R11 |
SnowBackpack design files
The KiCad project lives in the wandering-nora/SnowBackpack repository on GitHub; these links point at the commit this page was built from.
- Layoutsnowbackpack.kicad_pcb
- Schematicsnowbackpack.kicad_sch
SnowBackpack: common questions
How big is the SnowBackpack PCB?
The SnowBackpack measures 39.6 × 18 mm, has 2 copper layers and is 1 mm thick.
How many components are on the SnowBackpack?
62 components, from 35 distinct parts. The full bill of materials is listed on this page.
Where can I download the SnowBackpack design files?
From the wandering-nora/SnowBackpack repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the SnowBackpack design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which wandering-nora chose for the repository.
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