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2 layers40 × 13.2 mmUsb sample, the printed circuit board in 3D

sample pcb for DIY Digispark USB circuit

Size
40 × 13.2 mm
Copper layers
2
Thickness
1.6 mm
Parts
12
Nets
11
Pads
36
Tracks, vias
73, 3
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
25 May 2026
Updated
25 May 2026

Overview

Usb sample is an open-source printed circuit board by Seshak-code, from the Seshak-code/usb_sample repository on GitHub, published under the MIT licence. It is a 2-layer board of 40 × 13.2 mm with 12 parts on 11 nets, routed with 73 tracks and 3 vias.

It is built around the ATTINY45-20SU. 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

Parts

12
QtyValueFootprintReferences
23V6Diode_SMD:D_SOD-123D1, D2
268RResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR1, R2
2Conn_01x04Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_VerticalJ1, J2
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
1ATtiny45-20SPackage_SO:SOIC-8_5.3x5.3mm_P1.27mmU1
1LEDLED_THT:LED_D3.0mmD3
1~Sesha's_Custom_Library:PCB_USB_connectorU2

Questions

How big is the Usb sample PCB?

It measures 40 × 13.2 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Usb sample use?

12 parts, built around the ATTINY45-20SU. 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 Usb sample KiCad files?

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

Can I use the Usb sample 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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