2 layers10.2 × 22.9 mm Unilevel, the printed circuit board in 3D

Unilevel

Breakout PCBs

Size: 10.2 × 22.9 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 4
Nets: 18
Pads: 43
Tracks, vias: 81, 4
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 25 Jun 2025
Updated: 29 Apr 2026

Overview

Unilevel is an open-source printed circuit board by brainsmoke, from the brainsmoke/breakouts repository on GitHub. It is a 2-layer board of 10.2 × 22.9 mm with 4 parts on 18 nets, routed with 81 tracks and 4 vias.

It is built around the 74HCT245. Its parts include 2 connectors, 1 capacitor and 1 IC.

Main components

74HCT245
DIP-20-40℃~+85℃ 28ns@4.5V 4.5V~5.5V 6mA 6mA 74HCT 8 8uA Bidirectional TTL-compatible CMOS Tri-State DIP-20 Buffers, Drivers, Receivers, Transceivers ROHSWuxi I-core Elec74 Series

README

README.md

Breakouts

Uni-directional level shifter to 5V (untested)

Picture of a small PCB, with holes for two rows of 9 pin 2.54mm headers: 8 inputs, 8 outputs, VCC and Ground

Parts

Qty	Value	Footprint	References
2	Conn_01x09_Pin	Connector_PinSocket_2.54mm:PinSocket_1x09_P2.54mm_Vertical	J1, J2
1	1uF	Capacitor_SMD:C_0402_1005Metric	C1
1	74HCT245	Package_DFN_QFN:DHVQFN-20-1EP_2.5x4.5mm_P0.5mm_EP1x3mm	U1

Questions

How big is the Unilevel PCB?

It measures 10.2 × 22.9 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Unilevel use?

4 parts, built around the 74HCT245. 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 Unilevel KiCad files?

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

Can I use the Unilevel design in my own project?

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

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/brainsmoke-breakouts" title="Unilevel in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/brainsmoke-breakouts.jpg" alt="Unilevel" width="1200" height="900">

A picture that opens the board, for a README

[![Unilevel](https://pcbkit.io/embed/boards/brainsmoke-breakouts.jpg?size=s)](https://pcbkit.io/boards/brainsmoke-breakouts)

Source

Repository: brainsmoke/breakouts
Board file: pcb/unilevel/project.kicad_pcb
Commit: 81f0710
Licence: Not stated

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