2 layers133.4 × 95.4 mm Medusa, the printed circuit board in 3D

Medusa

Ble 5x7 Ortholinear Keyboard

Size: 133.4 × 95.4 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 90
Nets: 72
Pads: 380
Tracks, vias: 520, 53
Pours: 3
Routed: Yes
KiCad: KiCad 5 (file 20171130)
Created: 1 Sep 2018
Updated: 22 Sep 2018

Overview

Medusa is an open-source printed circuit board by Gtrx0, from the Gtrx0/Medusa repository on GitHub. It is a 2-layer board of 133.4 × 95.4 mm with 90 parts on 72 nets, routed with 520 tracks and 53 vias.

It is built around the SI2302. Its parts include 35 diodes, 2 transistors, 1 IC, 1 connector and 1 switch. It belongs with the keyboards and input boards of this library.

Main components

SI2302
SOT-23-55℃~+150℃ 1 N-channel 120pF 1V 1W 20V 300pF 3A 4nC@4.5V 65mΩ@2.5V 80pF N-Channel SOT-23 MOSFETs ROHSYONGYUTAIMOSFETs

README

README.md

Medusa

Frontside Render Backside Render

Layout

Features

Compatible with Cherry MX and ALPS switches.
Wireless Bluetooth operation.
Bluetooth achieved by nrf51822 chip and receiver with an pro mico
2 CR2023 coin cell batteries for long battery life.
Estimated 10 month continuous battery life
Switch to turn off batteries when the keyboard is not in use.
5x7 ortholinear layout with 2 break-away columns and 1 break-away row.
SMD diodes for ease of assembly
Mosfet reverse current protection
Programming header on the side of the PCB.

Warning

KiCad 5 or above is needed to open this project. KiCad 4 or below won't work.

Category and platform

Keyboards and input

Topics

mechanical keyboard

Project files

Show this board on your page

https://pcbkit.io/boards/Gtrx0/Medusa

The board's own page, for a message or a post.

Source

Repository: Gtrx0/Medusa
Board file: PROJECT.kicad_pcb
Commit: 9578138
Licence: Not stated

Parts

Qty	Value	Footprint	References
35	D_ALT	Diodes_SMD:D_SOD-123	D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +19
35	MX-1U	MX_Alps_Hybrid:MX-1U-NoLED	MX1, MX2, MX10, MX11, MX12, MX13, MX14, MX15, MX16, MX17, MX18, MX19, MX20, MX21, MX22, MX23 +19
12	CONN_1	keyboard_parts:PIN_1	P?, P?, P?, P?, P?, P?, P?, P?, P?, P?, P?, P?
2	Battery_Cell	Battery_Holders:Keystone_1058_1x2032-CoinCell	BT1, BT2
2	SI2302	mitosis-parts:SI3202CDS	Q1, Q2
1	Conn_01x04	mitosis-parts:programming_port	J1
1	Core51822B	mitosis-parts:Core51822(B)	U1
1	KEYSW	Pin_Headers:Pin_Header_Straight_1x03_Pitch2.00mm	k1
1	LOGO	Mixed Lib:Medusa	G***

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Questions

How big is the Medusa PCB?

It measures 133.4 × 95.4 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Medusa use?

90 parts, built around the SI2302. 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 Medusa KiCad files?

From the Gtrx0/Medusa repository on GitHub, at the commit this page was made from: the board is PROJECT.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Medusa design in my own project?

Its repository states no licence, so its author keeps all rights: ask Gtrx0 before reusing the design.