2 layers243.2 × 106 mm
2 layers266.7 × 81 mm
Qt45
qtkb/qt45-pcb1A single-layout 45-key PCB with a compatible acrylic layered case.
- Size
- 266.7 × 81 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 106
- Nets
- 85
- Pads
- 404
- Tracks, vias
- 604, 79
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 28 Mar 2019
- Updated
- 28 Jul 2019
Overview
Qt45 is an open-source printed circuit board by qtkb, from the qtkb/qt45-pcb repository on GitHub, published under the MIT licence. It is a 2-layer board of 266.7 × 81 mm with 106 parts on 85 nets, routed with 604 tracks and 79 vias.
It is built around the ATMEGA32U4-AU. Its parts include 45 diodes, 7 capacitors, 4 resistors, 1 IC and 1 switch. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdqt45 keyboard PCB
A single-layout 45-key PCB with a compatible acrylic layered case.
BOM
| LCSC part # | Description | Package | Value | Reference | Amount |
|---|---|---|---|---|---|
| C296091 | Capacitor | 0805 | 22pF | C1, C2 | 2 |
| C128353 | Capacitor | 0805 | 0.1uF | C3-C5 | 3 |
| C89854 | Capacitor | 0805 | 10uF | C6 | 1 |
| C215803 | Capacitor | 0805 | 1uF | C7 | 1 |
| C2099 | Diode | SOD-123 | D1-D45 | 45 | |
| C163512 | Fuse | 1206 | F1 | 1 | |
| C325772 | Resistor | 0805 | 22 | R1, R2 | 2 |
| C103904 | Resistor | 0805 | 10K | R3, R4 | 2 |
| C92584 | Switch | SMD | 1 | ||
| C44854 | MCU | QFP-44 | 32U4 | 1 | |
| C145778 | Connector | SMD | 1 | ||
| C255909 | Crystal | TSX-3225 | 16MHz | Y1 | 1 |
Parts
106| Qty | Value | Footprint | References |
|---|---|---|---|
| 45 | SOD-123 | random-keyboard-parts:D_SOD-123-Pretty | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +29 |
| 38 | MX-1U | MX_Alps_Hybrid:MXOnly-1U-NoLED | MX1, MX10, MX11, MX12, MX14, MX15, MX16, MX17, MX18, MX19, MX20, MX21, MX22, MX24, MX25, MX26 +22 |
| 4 | MX-1.25U | MX_Alps_Hybrid:MXOnly-1.25U-NoLED | MX2, MX13, MX36, MX42 |
| 3 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C3, C4, C5 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R3, R4 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 2 | MX-1.75U | MX_Alps_Hybrid:MXOnly-1.75U-NoLED | MX3, MX44 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C6 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric | C7 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | ATmega32U4-AU | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | MX-6.25U | MX_Alps_Hybrid:MXOnly-6.25U-ReversedStabilizers-NoLED | MX23 |
| 1 | Molex-0548190589 | random-keyboard-parts:Molex-0548190589 | USB1 |
| 1 | SW_PUSH | random-keyboard-parts:SKQG-1155865 | SW1 |
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Questions
How big is the Qt45 PCB?
It measures 266.7 × 81 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Qt45 use?
106 parts, built around the ATMEGA32U4-AU. 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 Qt45 KiCad files?
From the qtkb/qt45-pcb repository on GitHub, at the commit this page was made from: the board is qt45.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Qt45 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).