2 layers46 × 46 mm
Maiana Blue N2000 v8.2
Haimana/MAIANA_BLUE
Firmware and hardware materials for the MAIANA-class AIS transponder ecosystem. The design builds on the open MAIANA project (GPL v3, Peter Antypas).
54 parts3
2 layers323.9 × 128.6 mm
75-keyboard pcb
cheephy/75-keyboard-pcbA test project following master zen's "How to make a keyboard from scratch" to make a gmmk pro 75% layout style keybord using KiCad and FreeCad.
- Size
- 323.9 × 128.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 185
- Nets
- 124
- Pads
- 1,012
- Tracks, vias
- 390, 4
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 24 Jul 2024
- Updated
- 24 Jul 2024
Overview
75-keyboard pcb is an open-source printed circuit board by cheephy, from the cheephy/75-keyboard-pcb repository on GitHub. It is a 2-layer board of 323.9 × 128.6 mm with 185 parts on 124 nets, routed with 390 tracks and 4 vias.
It is built around the ATMEGA32U4-AU, PRTR5V0U2X and X322516MOB4SI. Its parts include 83 switches, 82 diodes, 8 capacitors, 6 resistors and 2 ICs. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA32U4-AU
QFP-44(10x10)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH QFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
X322516MOB4SI
SMD3225-4P-40℃~+85℃ 12pF 16MHz 50Ω Crystal Oscillator ±10ppm ±20ppm SMD3225-4P Crystals ROHSYXCCrystals
README
README.md75% keyboard
A test project following master zen's "How to make a keyboard from scratch" to make a gmmk pro 75% layout style keybord using KiCad and FreeCad.
Parts
185| Qty | Value | Footprint | References |
|---|---|---|---|
| 82 | D_Small | Diode_SMD:D_SOD-123 | D1, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24 +66 |
| 71 | SW_Push | PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_Plated_1.00u | SW1, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23, SW24 +55 |
| 4 | 0.1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9, C10, C11, C12 |
| 3 | SW_Push | PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_Plated_1.25u | SW74, SW75, SW76 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R7 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R9 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C14, C15 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10, R11 |
| 2 | SW_Push | PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_Plated_2.25u | SW59, SW61 |
| 2 | SW_Push | PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_Plated_1.75u | SW47, SW72 |
| 2 | SW_Push | PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_Plated_1.50u | SW32, SW45 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C13 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | 500m | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F2 |
| 1 | ATmega32U4-A | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | AVR-ISP-6 | random-keyboard-parts:Reset_Pretty-Mask | J2 |
| 1 | HRO-TYPE-C-31-M-12 | Type-C.pretty-master:HRO-TYPE-C-31-M-12-HandSoldering | USB2 |
| 1 | PRTR5V0U2X | random-keyboard-parts:SOT143B | U2 |
| 1 | SW_Push | PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_Plated_2.00u | SW30 |
| 1 | SW_Push | PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_Plated_6.25u | SW77 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_SKQG_WithStem | SW2 |
| 1 | X322516MOB4SI | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y2 |
Questions
How big is the 75-keyboard pcb PCB?
It measures 323.9 × 128.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 75-keyboard pcb use?
185 parts, built around the ATMEGA32U4-AU, PRTR5V0U2X and X322516MOB4SI. 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 75-keyboard pcb KiCad files?
From the cheephy/75-keyboard-pcb repository on GitHub, at the commit this page was made from: the board is 75% keyboard pcb.kicad_pcb and its schematic 75% keyboard pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 75-keyboard pcb design in my own project?
Its repository states no licence, so its author keeps all rights: ask cheephy before reusing the design.
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