Middle
About the Middle PCB
Middle is an open source PCB design by Ciaanh, published on GitHub. It is a 2-layer board measuring 467.5 × 140 mm, with 237 components from 18 distinct parts.
Other key parts include the Elite-C. By type, the board carries 78 resistors, 75 switches, 75 diodes, 2 connectors, 1 IC and 1 transistor.
It belongs with the keyboards and displays & leds designs in this gallery.
From the project
Pallas: one of the names of Athena, goddess of wisdom, war and craftsmanship.
Pallas: one of the names of Athena, goddess of wisdom, war and craftsmanship.
This keyboard was inspired by the famous Alice keyboard. The main issue I found with the layout of the Alice keyboard is that despite being "ergonomic" the two halves were too close for me. The result is the twelve keys pad at the center which filled the gap between the left and right part while providing function keys, num pad or macro keys.
Main components on the Middle
Middle bill of materials (BOM)
237 components, 18 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Elite-C | Elite-C-castellated-29pin-holes | U1 |
| 1 | IRLML6344TRPbF | SOT23-3_HSOL_Back | Q1 |
| 1 | OLED | OLED_128x64_I2C | J1 |
| 1 | RGB_LED | conn_3pins | J2 |
| 4 | WS2812B | WS2812B_Front | RGB1, RGB2, RGB3, RGB4 |
| 1 | SW_RST | SW_RST | RSW0 |
| 61 | SW_PUSH | SW_Cherry_MX_1.00u_PCB | SW00, SW01, SW02, SW03, SW04, SW05, SW06, SW07 +53 |
| 1 | SW_PUSH | SW_Cherry_MX_1.50u_PCB | SW10 |
| 2 | SW_PUSH | SW_Cherry_MX_1.75u_PCB | SW20, SW314 |
| 1 | SW_PUSH | SW_Cherry_MX_2.25u_PCB | SW30 |
| 7 | SW_PUSH | SW_Cherry_MX_1.25u_PCB | SW40, SW41, SW42, SW45, SW411, SW413, SW414 |
| 1 | SW_PUSH | SW_Cherry_MX_2.00u_PCB | SW44 |
| 1 | SW_PUSH | SW_Cherry_MX_2.25u_ISO_PCB | SW214 |
| 1 | SW_PUSH | SW_Cherry_MX_2.75u_PCB | SW412 |
| 75 | Diode | Diode_SMD_THT | D00, D01, D02, D03, D04, D05, D06, D07 +67 |
| 75 | 470 | Resistors_SMD_THT | R00, R01, R02, R03, R04, R05, R06, R07 +67 |
| 2 | 4.7k | Resistors_SMD_THT | R1, R2 |
| 1 | 1K | Resistors_SMD_THT | R3 |
Middle design files
The KiCad project lives in the Ciaanh/keyboards repository on GitHub; these links point at the commit this page was built from.
Middle: common questions
How big is the Middle PCB?
The Middle measures 467.5 × 140 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Middle?
237 components, from 18 distinct parts. The full bill of materials is listed on this page.
Where can I download the Middle design files?
From the Ciaanh/keyboards repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Middle design in my own project?
The repository has no license, so all rights stay with Ciaanh. Use it as a reference, and ask the author before reusing the design.
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