2 layers243.2 × 106 mm
2 layers119.1 × 113.5 mm
NumPad
JJKeyboards/NumPadCustom QMK NumPad
- Size
- 119.1 × 113.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 72
- Nets
- 74
- Pads
- 305
- Tracks, vias
- 423, 19
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 8 Oct 2020
- Updated
- 8 Oct 2020
Overview
NumPad is an open-source printed circuit board by JJKeyboards, from the JJKeyboards/NumPad repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 119.1 × 113.5 mm with 72 parts on 74 nets, routed with 423 tracks and 19 vias.
It is built around the ATMEGA32U4-AU. Its parts include 27 diodes, 7 capacitors, 6 resistors, 1 IC and 1 connector. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1Parts
72| Qty | Value | Footprint | References |
|---|---|---|---|
| 27 | SOD-123 | Diode_SMD:D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +11 |
| 24 | MX-NoLED | MX_Only:MXOnly-1U-NoLED | MX_1, MX_2, MX_10, MX_11, MX_13, MX_14, MX_15, MX_16, MX_17, MX_18, MX_19, MX_20, MX_21, MX_22, MX_24, MX_25 +8 |
| 3 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C3 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R2 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3, R4 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C5, C6 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R5, R6 |
| 2 | MX-NoLED | CustomFootprints:MXOnly-2U-NoLED-Vertical-StabSwap | MX_12, MX_23 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C4 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C7 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1 |
| 1 | ATmega32U4-AU | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | MX-NoLED | CustomFootprints:MXOnly-2U-NoLED-StabSwap | MX_26 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_TL3342 | SW_1 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_JAE_DX07S016JA1 | J1 |
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Questions
How big is the NumPad PCB?
It measures 119.1 × 113.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the NumPad use?
72 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 NumPad KiCad files?
From the JJKeyboards/NumPad repository on GitHub, at the commit this page was made from: the board is NumPad.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the NumPad design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).