2 layers28 × 41 mm
GRRNble
takjn/GRRNble
DIY Smartwatch using Renesas RL78/G13 MCU and RN4020 ble module with Android companion app.
59 parts2
2 layers28 × 36 mm
GRWatch
takjn/GRWatchTiny watch based on RL78/G13
- Size
- 28 × 36 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 29
- Nets
- 72
- Pads
- 165
- Tracks, vias
- 349, 21
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 1 May 2018
- Updated
- 19 Jun 2018
Overview
GRWatch is an open-source printed circuit board by takjn, from the takjn/GRWatch repository on GitHub. It is a 2-layer board of 28 × 36 mm with 29 parts on 72 nets, routed with 349 tracks and 21 vias.
It is built around the R5F100LJAFB#10. Its parts include 11 capacitors, 7 resistors, 3 ICs, 3 switches and 2 connectors.
Main components
1README
README.mdGR-Watch
KurumiWatchを動かすための専用基板です。
Parts
29| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 1.0uF | Capacitors_SMD:C_0805_HandSoldering | C5, C6, C9, C10 |
| 3 | 10k | Resistors_SMD:R_0805_HandSoldering | R5, R6, R7 |
| 3 | SW_Push | misc:SKSC | SW1, SW2, SW3 |
| 2 | 0.1uF | Capacitors_SMD:C_0805_HandSoldering | C2, C11 |
| 2 | 15pF | Capacitors_SMD:C_0805_HandSoldering | C3, C4 |
| 1 | 0.47uF | Capacitors_SMD:C_0805_HandSoldering | C1 |
| 1 | 12k | Resistors_SMD:R_0805_HandSoldering | R2 |
| 1 | 1k | Resistors_SMD:R_0805_HandSoldering | R1 |
| 1 | 2.2uF | Capacitors_SMD:C_0805_HandSoldering | C8 |
| 1 | 2k | Resistors_SMD:R_0805_HandSoldering | R3 |
| 1 | 32.768k | Crystals:Crystal_SMD_G8-2pin_3.2x1.5mm_HandSoldering | Y1 |
| 1 | 390k | Resistors_SMD:R_0805_HandSoldering | R4 |
| 1 | 4.7uF | Capacitors_SMD:C_0805_HandSoldering | C7 |
| 1 | BUZZER | misc:BZ7025_3pin | U2 |
| 1 | Battery_Cell | Battery_Holders:Keystone_3034_1x20mm-CoinCell | BT1 |
| 1 | JST_SH_04 | JST-SH:JST-SM-04B-SRSS-TB | J2 |
| 1 | JST_SH_06 | JST-SH:JST-SM-06B-SRSS-TB | J1 |
| 1 | LOGO | misc:logo | G*** |
| 1 | R5F100LJAFB | Housings_QFP:LQFP-64_10x10mm_Pitch0.5mm | U1 |
| 1 | SSD1306 | SSD1306:SSD1306 | U3 |
Questions
How big is the GRWatch PCB?
It measures 28 × 36 mm and has 2 copper layers, 1.6 mm thick.
What parts does the GRWatch use?
29 parts, built around the R5F100LJAFB#10. 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 GRWatch KiCad files?
From the takjn/GRWatch repository on GitHub, at the commit this page was made from: the board is GRWatch.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the GRWatch design in my own project?
Its repository states no licence, so its author keeps all rights: ask takjn before reusing the design.
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