2 layers191.8 × 121.3 mm
8-Bit CPU 32k
slu4coder/Minimal-UART-Computer-1-2
Legacy: Version 1 and 2 of my TTL-only CPU featuring UART I/O, an expansion port, 512KB SSD at up to 10MHz clock speed
109 parts184
2 layers215.9 × 20.3 mm
Keybed
friggeri/keyboard69- Size
- 215.9 × 20.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 56
- Pads
- 157
- Tracks, vias
- 299, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 2 Sep 2022
- Updated
- 17 Oct 2022
Overview
Keybed is an open-source printed circuit board by friggeri, from the friggeri/keyboard repository on GitHub. It is a 2-layer board of 215.9 × 20.3 mm with 28 parts on 56 nets, routed with 299 tracks and 0 vias.
It is built around the ATMEGA328-PU, 74HC165D and 74HC164. Its parts include 8 capacitors, 5 connectors, 4 ICs, 3 resistors and 1 inductor. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA328-PU
PDIP-28-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH PDIP-28 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
74HC165D
SO-16-40℃~+125℃ 1 28ns@6V,50pF 2V~6V 35MHz 500mW 74HC 8 Parallel or Serial to Serial SOIC-16 Shift Registers ROHSNexperiaShift Registers
74HC164
SOP-140℃~+70℃ 1 24ns@5V,16pF 2V~6V 74HC 8 Serial-to-Parallel SOP-14 Shift Registers ROHSGRShift Registers
README
README.mdParts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 0.1uf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C1, C2, C3, C6, C7, C8 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 2 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | 22pf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C4, C5 |
| 2 | 74HC165 | Package_DIP:DIP-16_W7.62mm_Socket | U3, U4 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 10k | Resistor_THT:R_Array_SIP11 | RN1 |
| 1 | 10uh | ul_22R103C:22R103C | L1 |
| 1 | 16MHz | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | 74HC164 | Package_DIP:DIP-14_W7.62mm_Socket | U2 |
| 1 | AT | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Horizontal | J3 |
| 1 | ATMega328p | Package_DIP:DIP-28_W7.62mm_Socket | U1 |
| 1 | I/0 | TerminalBlock_Altech:Altech_AK300_1x08_P5.00mm_45-Degree | J1 |
| 1 | Keyboard | 9-215079-0:TE_9-215079-0 | J5 |
| 1 | LOGO | mlon:mlon_logo | G*** |
| 1 | Midi | TerminalBlock_Altech:Altech_AK300_1x03_P5.00mm_45-Degree | J6 |
| 1 | Programmer | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J2 |
Questions
How big is the Keybed PCB?
It measures 215.9 × 20.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Keybed use?
28 parts, built around the ATMEGA328-PU, 74HC165D and 74HC164. 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 Keybed KiCad files?
From the friggeri/keyboard repository on GitHub, at the commit this page was made from: the board is pcb/keybed.kicad_pcb and its schematic pcb/keybed.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Keybed design in my own project?
Its repository states no licence, so its author keeps all rights: ask friggeri before reusing the design.
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