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2 layers40 × 12.2 mmAttiny85 USB, the printed circuit board in 3D

My first ever PCB, which didn't go so well, but it taught me how to use KiCad and the main editors in the software. It is a PCB that has an LED!!!

Size
40 × 12.2 mm
Copper layers
2
Thickness
1.6 mm
Parts
12
Nets
23
Pads
53
Tracks, vias
2, 0
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
14 Jun 2026
Updated
14 Jun 2026

Overview

Attiny85 USB is an open-source printed circuit board by lillylike123, from the lillylike123/My-PCB repository on GitHub. It is a 2-layer board of 40 × 12.2 mm with 12 parts on 23 nets, routed with 2 tracks and 0 vias.

It is built around the ATTINY85-20MU. Its parts include 4 resistors, 3 diodes, 2 ICs, 2 connectors and 1 capacitor. It belongs with the AVR (ATmega, ATtiny) boards of this library.

Main components

1

README

README.md

My-PCB

My first ever PCB, which didn't go so well, but it taught me how to use KiCad and the main editors in the software. It is a PCB that has an LED!!!

I put the Gerber files for the Git repo. Next time, I'll look into the different parts and spend more time. For now, I am very proud of myself.

Parts

12
QtyValueFootprintReferences
23V6Diode_SMD:D_SOD-128D1, D2
268RResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR1, R2
1100nCapacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolderC1
11k5Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR4
1330RResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR3
1ATtiny85-20MPackage_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.6x2.6mmU1
1LEDLED_THT:LED_D3.0mmD3
1SO8-1-4Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_VerticalJ1
1SO8-5-8Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_VerticalJ2
1~1_My_custom_libary:PCB_USB_connectorU2

Questions

How big is the Attiny85 USB PCB?

It measures 40 × 12.2 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Attiny85 USB use?

12 parts, built around the ATTINY85-20MU. 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 Attiny85 USB KiCad files?

From the lillylike123/My-PCB repository on GitHub, at the commit this page was made from: the board is Attiny85_USB.kicad_pcb and its schematic Attiny85_USB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Attiny85 USB design in my own project?

Its repository states no licence, so its author keeps all rights: ask lillylike123 before reusing the design.

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