2 layers90 × 40 mm
GEMS Emerald
GemsErasmusPlus/GEMS_Electronics
electronics design for the GEMS educational hardware
69 parts3CC-BY-SA-4.0
2 layers90 × 40 mm
GEMS Ruby
GemsErasmusPlus/GEMS_Electronics3electronics design for the GEMS educational hardware
- Size
- 90 × 40 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 70
- Nets
- 51
- Pads
- 232
- Tracks, vias
- 564, 115
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 17 Feb 2025
- Updated
- 3 Mar 2025
Overview
GEMS Ruby is an open-source printed circuit board by GemsErasmusPlus, from the GemsErasmusPlus/GEMS_Electronics repository on GitHub, published under the CC-BY-SA-4.0 licence. It is a 2-layer board of 90 × 40 mm with 70 parts on 51 nets, routed with 564 tracks and 115 vias.
It is built around the ESP32-C3, MAX4468EKA and USBLC6-2SC6, with the CMA-4544PF-W and DMG2305UX-13 among its other parts. Its parts include 26 resistors, 20 capacitors, 8 diodes, 7 ICs and 2 switches. It belongs with the ESP32 and RISC-V boards of this library.
Main components
5
ESP32-C3
QFN-32-EP(5x5)12bit 160MHz 22 3V~3.6V Others QFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHSEspressif SystemsMicrocontrollers (MCU/MPU/SOC)
MAX4468EKA
SOT-23-8Enable/shutdown function SOT-23-8 Audio Amplifiers ROHSMaxim Integrated (Analog Devices)Audio Amplifiers
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
CMA-4544PF-W
--44dB@±2dB 2.2kΩ 3V~10V 4.65mm 500uA 60dB 9.7mm Omnidirectional 插件,D=9.7mm Microphones ROHSCUIBuzzers
DMG2305UX-13
SOT-23-55℃~+150℃ 1 P-Channel 1.4W 10.2nC@4.5V 20V 40mΩ@4.5V、52mΩ@2.5V 5A 77pF 808pF 85pF 900mV P-Channel SOT-23 MOSFETs ROHSDiodes IncorporatedMOSFETs
README
README.mdGEMS_Electronics
GEMS_Electronics repository contains selected results of Erasmus+ project GEMS that are directly related to the electronics design for the GEMS educational hardware.
Project GEMS - Graceful Equalising of Mechatronics Students aims to develop affordable educational hardware for mechatronics students, along with supporting online courses and tutorials. This will allow all students to have equal learning opportunities, regardless of their background or learning needs.
Disclaimer
Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or CMEPIUS. Neither the European Union nor the granting authority can be held responsible for them.
Parts
70| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 0.1uF | GEMS_Library:C_1206_(3216) | C2, C5, C6, C7, C8, C9, C14, C18, C20 |
| 7 | 100k | GEMS_Library:R_1206_(3216) | R1, R2, R3, R4, R6, R19, R24 |
| 7 | 10uF | GEMS_Library:C_1206_(3216) | C1, C3, C4, C13, C15, C17, C19 |
| 6 | Yellow | GEMS_Library:LED_D3.0mm | D3, D4, D5, D6, D7, D8 |
| 3 | 1M | GEMS_Library:R_1206_(3216) | R9, R13, R16 |
| 3 | 47 | GEMS_Library:R_1206_(3216) | R14, R20, R25 |
| 2 | 0.01uF | GEMS_Library:C_1206_(3216) | C10, C11 |
| 2 | 100pF | GEMS_Library:C_1206_(3216) | C12, C16 |
| 2 | 1k | GEMS_Library:R_1206_(3216) | R21, R26 |
| 2 | 22k | GEMS_Library:R_1206_(3216) | R18, R23 |
| 2 | 2K | GEMS_Library:R_1206_(3216) | R12, R15 |
| 2 | 2k | GEMS_Library:R_1206_(3216) | R10, R11 |
| 2 | 5.1k | GEMS_Library:R_1206_(3216) | R7, R8 |
| 2 | 570k | GEMS_Library:R_1206_(3216) | R17, R22 |
| 2 | CAN_connector | GEMS_Library:IDC8_Micro-MaTch | CAN1, CAN2 |
| 2 | CMA-4544PF-W | GEMS_Library:CMA-4544PF-W | MIC1, MIC2 |
| 2 | MAX4468 | GEMS_Library:SOT-23-8 | U4, U5 |
| 1 | 240 | GEMS_Library:R_1206_(3216) | R5 |
| 1 | BTN | GEMS_Library:SW_PUSH_6mm_SMD | SW1 |
| 1 | DMG2305UX-13 | GEMS_Library:SOT-23 | Q1 |
| 1 | ESP32-C3 | GEMS_Library:ESP32-C3-WROOM-02 | U2 |
| 1 | Green | GEMS_Library:LED_D3.0mm | D2 |
| 1 | R1170H331B | GEMS_Library:SOT-89-5 | U1 |
| 1 | RCWL-1601 | GEMS_Library:RCWL-1601 | U6 |
| 1 | RST | GEMS_Library:SW_PUSH_6mm_SMD | SW2 |
| 1 | TCAN332DR | GEMS_Library:SOIC-8 | U7 |
| 1 | USBLC6-2SC6 | GEMS_Library:SOT-23-6 | U3 |
| 1 | USB_C_USB2.0 | GEMS_Library:USB-C_MOLEX-216990-0001 | J1 |
| 1 | XBS306 | GEMS_Library:DO-214_(SMA) | D1 |
The 69 most common of 70 parts.
Questions
How big is the GEMS Ruby PCB?
It measures 90 × 40 mm and has 2 copper layers, 1.6 mm thick.
What parts does the GEMS Ruby use?
70 parts, built around the ESP32-C3, MAX4468EKA, USBLC6-2SC6 and CMA-4544PF-W. 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 GEMS Ruby KiCad files?
From the GemsErasmusPlus/GEMS_Electronics repository on GitHub, at the commit this page was made from: the board is GEMS_Ruby/GEMS_Ruby.kicad_pcb and its schematic GEMS_Amethyst/GEMS_Amethyst.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the GEMS Ruby design in my own project?
Its repository publishes it under the CC-BY-SA-4.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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