Eink mahjong compass
About the Eink mahjong compass PCB
Eink mahjong compass is an open source PCB design by ikuto0815, published on GitHub under the AGPL-3.0 license. It is a 2-layer board measuring 123.4 × 123.4 mm, with 43 components from 27 distinct parts.
Other key parts include the C16581, C85364, MAX17048 and C235316. By type, the board carries 13 capacitors, 11 resistors, 4 ICs, 4 switches, 4 LEDs and 1 transistor.
It belongs with the displays & leds and power & battery designs in this gallery.
From the project
This repo contains all the files neccesary to build a bluetooth controlled digital mahjong compass.
This repo contains all the files neccesary to build a bluetooth controlled digital mahjong compass.
The project is divided into the following main parts:
3d: the freecad project and stl-files to 3D print the case androidapp: the android app used to control the device firmware: firmware for the ESP32 microcontroller inside pcb**: design files for the custom PCB
Main components on the Eink mahjong compass
Eink mahjong compass bill of materials (BOM)
43 components, 27 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C16581 TOPPOWER(南京拓微) | ESOP-8_L4.9-W3.9-P1.27-LS6.0-BL-EP | U1 |
| 1 | C85364 R+O(宏嘉诚) | SOT-23-6_L2.9-W1.6-P0.95-LS2.9-BL | U2 |
| 1 | MAX17048 | DFN-8 | U4 |
| 1 | C235316 MICRONE(南京微盟) | SOT-353_L2.1-W1.3-P0.65-LS2.3-BL | U8 |
| 1 | C10487 VISHAY(威世) | SOT-23-3_L3.0-W1.7-P0.95-LS2.9-BR | Q1 |
| 1 | C32346 EPSON(爱普生) | FC-135R_L3.2-W1.5 | X1 |
| 1 | PH-2AWT | CONN-SMD_PH-2AWT | J1 |
| 1 | C318884 XKB Connection(中国星坤) | SW-SMD_4P-L5.1-W5.1-P3.70-LS6.5-TL_H1.5 | BOOT1 |
| 1 | C318884 XKB Connection(中国星坤) | SW-SMD_4P-L5.1-W5.1-P3.70-LS6.5-TL_H1.5 | Reset1 |
| 4 | C318884 XKB Connection(中国星坤) | SW-SMD_4P-L5.1-W5.1-P3.70-LS6.5-TL_H1.5 | SW3, SW4, SW5, SW6 |
| 1 | C2927038 DEALON(德艺隆) | USB-C_SMD-TYPE-C-31-M-12 | USB2 |
| 4 | C2297 KENTO | LED0805-R-RD | LED1, LED2, LED3, LED4 |
| 1 | C8678 MDD(辰达半导体) | SMA_L4.3-W2.6-LS5.2-RD | D2 |
| 1 | 22UF 22uF | C_0603_1608Metric | C1 |
| 2 | 0.1UF 0.1uF | C_0402_1005Metric | C2, C5 |
| 2 | 1UF 1uF | C_0402_1005Metric | C3, C14 |
| 2 | 15PF 15pF FH(风华) | C0402 | C4, C8 |
| 2 | 1.0UF 1.0uF | C_0402_1005Metric | C6, C15 |
| 2 | 4.7UF 4.7uF | C_0402_1005Metric | C7, C9 |
| 2 | 10UF 10uF | C_0402_1005Metric | C13, C16 |
Show 7 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1M | R_0603_1608Metric | R1 |
| 1 | 330K 330k | R_0603_1608Metric | R2 |
| 1 | 2.0K 2.0k | R_0402_1005Metric | R4 |
| 4 | 49.9 | R_0402_1005Metric | R5, R7, R9, R12 |
| 1 | 100K 100k | R_0402_1005Metric | R6 |
| 1 | 10K 10k | R_0402_1005Metric | R8 |
| 2 | 5.1K 5.1k | R_0402_1005Metric | R10, R11 |
Eink mahjong compass design files
The KiCad project lives in the ikuto0815/eink_mahjong_compass repository on GitHub; these links point at the commit this page was built from.
Eink mahjong compass: common questions
How big is the Eink mahjong compass PCB?
The Eink mahjong compass measures 123.4 × 123.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Eink mahjong compass?
43 components, from 27 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Eink mahjong compass design files?
From the ikuto0815/eink_mahjong_compass repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Eink mahjong compass design in my own project?
Yes, under the terms of its AGPL-3.0 license, which ikuto0815 chose for the repository.
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