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2 layers38.1 × 52.2 mmLedusbc2key, the printed circuit board in 3D

Ledusbc2key

yerriad/pcb-design

personal pcb learning. if i have time, i'll add resources to help you

Full screenGitHub.kicad_pcb
Size
38.1 × 52.2 mm
Copper layers
2
Thickness
1.6 mm
Parts
24
Nets
38
Pads
118
Tracks, vias
157, 14
Pours
1
Routed
Yes
KiCad
KiCad 6 (file 20211014)
Created
6 Sep 2022
Updated
15 Oct 2022

Overview

Ledusbc2key is an open-source printed circuit board by yerriad, from the yerriad/pcb-design repository on GitHub. It is a 2-layer board of 38.1 × 52.2 mm with 24 parts on 38 nets, routed with 157 tracks and 14 vias.

It is built around the ATMEGA32U2-AU, PRTR5V0U2X and WS2812B. Its parts include 8 capacitors, 6 resistors, 3 switches, 2 ICs and 2 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.

Main components

3

README

README.md

pcb-design

personal pcb learning. if i have time, i'll add resources to help you

i am following ai03's guide to pcbs. i'll see how i'm do with that for the next while.

components required

all of these needs to be surface mount hand soldierable. i'll try to find them from the same company (mouser or jaycar) but amazon is pretty good. all of these don't include shipping.

Component NamePlace(s) to purchase fromPrice/part (lowest amount available)
ATMEGA32u2-ARmouser, theres some waitNZ$6.43 for one
Kailh Hotswap Socketsaliexpress and amazon can't ship to nz :(aliexpress: NZ$0.469 each for 30pcs, amazon: NZ$0.248 each for 50pcs
WS2812Bamazon$1.798 for 1m
TSX-3225mouserspecific part not found using footprint, but varies from NZ$0.709 - 1.400 each
Resistorsjaycar, metal film and carbon film are availableNZ$1 each for most, if not usually cheaper
1N4148W-TP (not needed for 2k or 3k)mouser, has not been checked yet, just has the same name as the footprint i usedNZ$0.321 for one
TL3342F160QGmouser same as aboveNZ$1.03 for one
Molex 216990-0003mouser same as aboveNZ$1.43 for one

Resistors and diodes used

ledusbc2key

numpad

PCB statistics report

Auto generated by KiCad

Board

  • Width: 43.8150 mm
  • Height: 54.2925 mm
  • Area: 2273.5889 sq. mm

Pads

  • Through hole: 4
  • SMD: 98
  • Connector: 0
  • NPTH: 16

Vias

  • Through vias: 17
  • Blind/buried: 0
  • Micro vias: 0

Components

Front SideBack SideTotal
THT:000
SMD:22224
Total:22224

Drill holes

CountShapeX SizeY SizePlatedVia/PadStart LayerStop Layer
17Round0.4000 mm0.4000 mmPTHViaF.CuB.Cu
4Round1.7500 mm1.7500 mmNPTHPadF.CuB.Cu
4Round3.0000 mm3.0000 mmNPTHPadF.CuB.Cu
4Round2.1000 mm2.1000 mmNPTHPadF.CuB.Cu
2Round3.9878 mm3.9878 mmNPTHPadF.CuB.Cu
2Round0.6500 mm0.6500 mmNPTHPadF.CuB.Cu
2Slot0.6000 mm1.2000 mmPTHPadF.CuB.Cu
2Slot0.6000 mm1.7000 mmPTHPadF.CuB.Cu

Parts

24
QtyValueFootprintReferences
40.1uFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC4, C5, C7, C8
210kResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR1, R6
214pFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC2, C3
222Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR2, R3
25.1kResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR4, R5
2MX_SW_HSmarbastlib-mx:SW_MX_HS_1uSW2, SW3
2WS2812BLED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mmD1, D2
110uFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC6
11uFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC1
1ATmega32U2-APackage_QFP:TQFP-32_7x7mm_P0.8mmU1
1Crystal_GND24_SmallCrystal:Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSolderingY1
1HRO-TYPE-C-31-M-12Type-C:HRO-TYPE-C-31-M-12-HandSolderingUSB1
1PRTR5V0U2Xrandom-keyboard-parts:SOT143BU2
1Polyfuse_SmallFuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolderF1
1SW_Pushrandom-keyboard-parts:SKQGADE010SW1

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Questions

How big is the Ledusbc2key PCB?

It measures 38.1 × 52.2 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Ledusbc2key use?

24 parts, built around the ATMEGA32U2-AU, PRTR5V0U2X and WS2812B. 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 Ledusbc2key KiCad files?

From the yerriad/pcb-design repository on GitHub, at the commit this page was made from: the board is ledusbc2key/ledusbc2key.kicad_pcb and its schematic ledusbc2key/ledusbc2key.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Ledusbc2key design in my own project?

Its repository states no licence, so its author keeps all rights: ask yerriad before reusing the design.