4 layers137 × 86 mm
2 layers92 × 54.5 mm
Mcu board
igagis/best84kbcustom 84 keys keyboard project
- Size
- 92 × 54.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 94
- Nets
- 55
- Pads
- 212
- Tracks, vias
- 884, 129
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 12 Jan 2020
- Updated
- 8 Sep 2024
Overview
Mcu board is an open-source printed circuit board by igagis, from the igagis/best84kb repository on GitHub, published under the MIT licence. It is a 2-layer board of 92 × 54.5 mm with 94 parts on 55 nets, routed with 884 tracks and 129 vias.
It is built around the ATMEGA32U4-AU, LL4148 and PRTR5V0U2X. Its parts include 52 connectors, 17 diodes, 8 switches, 7 resistors and 5 capacitors. It belongs with the microcontroller boards 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)
LL4148
LL-341 Independent 1V@10mA 200mA 4A 4ns 500mW 5uA@75V 75V LL-34 Switching Diodes ROHSMDDSwitching Diodes
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)
README
README.mdbest84kb
custom 84 keys keyboard project
Ubuntu
install gcc-avr, avr-libc, dfu-programmer, avrdude packages via apt
Parts
94| Qty | Value | Footprint | References |
|---|---|---|---|
| 51 | Conn_01x01_Female | Connector_Wire:SolderWirePad_1x01_Drill0.8mm | J1, J10, J11, J12, J13, J14, J15, J16, J17, J18, J19, J20, J21, J22, J23, J24 +35 |
| 8 | LED | LED_THT:LED_D3.0mm | D6, D7, D8, D9, D10, D13, D14, D16 |
| 8 | LL4148 | Diode_SMD:D_MiniMELF | D1, D2, D3, D4, D11, D12, D15, D17 |
| 6 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX1A_1.00u_Plate | SW1, SW4, SW5, SW6, SW7, SW8 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R6 |
| 2 | 22R | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 22pF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 10R | Resistor_SMD:R_1210_3225Metric | R7 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 22uF | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C5 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 8MHz | Crystal:Crystal_SMD_5032-4Pin_5.0x3.2mm | Y1 |
| 1 | ATmega32U4-AU | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | BC817, MMBTA42 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Conn_01x06_Female | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Vertical | J2 |
| 1 | HRO-TYPE-C-31-M-12 | usb_type_c:HRO-TYPE-C-31-M-12-HandSoldering | USB1 |
| 1 | PRTR5V0U2X | Package_TO_SOT_SMD:SOT-143 | D5 |
| 1 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX1A_2.25u_Plate | SW3 |
| 1 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX1A_1.75u_Plate | SW2 |
Questions
How big is the Mcu board PCB?
It measures 92 × 54.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mcu board use?
94 parts, built around the ATMEGA32U4-AU, LL4148 and PRTR5V0U2X. 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 Mcu board KiCad files?
From the igagis/best84kb repository on GitHub, at the commit this page was made from: the board is kicad/mcu_board/mcu_board.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mcu board design in my own project?
Its repository publishes it under the MIT 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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