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2 layers66 × 45.7 mmRotary compresion tool, the printed circuit board in 3D

Rotary compresion tool

FadyFaheem/REKT-Mini

Designed and implemented a custom rotary engine compression measurement tool with custom PCB and ATTiny85 firmware; validated compression across 4+ engines and reduced diagnostic cost from $200+ to <$30.

Size
66 × 45.7 mm
Copper layers
2
Thickness
1.6 mm
Parts
9
Nets
9
Pads
25
Tracks, vias
19, 0
Pours
1
Routed
Yes
KiCad
KiCad 6 (file 20211014)
Created
2 Nov 2022
Updated
3 Jan 2026

Overview

Rotary compresion tool is an open-source printed circuit board by FadyFaheem, from the FadyFaheem/REKT-Mini repository on GitHub, published under the MIT licence. It is a 2-layer board of 66 × 45.7 mm with 9 parts on 9 nets, routed with 19 tracks and 0 vias.

It is built around the ATTINY85V-10PU. Its parts include 3 connectors and 2 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.

Main components

1

README

README.md

REKT-Mini

Built an embedded sensor data acquisition system with custom firmware (ATTiny85) and Python data processing pipeline, implementing real-time sensor fusion and calibration algorithms that reduced measurement time by ~85% compared to manual methods across 4+ validation runs.

Parts

9
QtyValueFootprintReferences
1 TerminalBlock:TerminalBlock_bornier-2_P5.08mmJ1
1ATtiny85V-10PPackage_DIP:DIP-8_W7.62mmU2
1LM7805_TO220Package_TO_SOT_THT:TO-220-3_VerticalU1
1OLED DISPLAYConnector:FanPinHeader_1x04_P2.54mm_VerticalJ2
1SensorTerminalBlock:TerminalBlock_bornier-3_P5.08mmJ3

The 5 most common of 9 parts.

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Questions

How big is the Rotary compresion tool PCB?

It measures 66 × 45.7 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Rotary compresion tool use?

9 parts, built around the ATTINY85V-10PU. 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 Rotary compresion tool KiCad files?

From the FadyFaheem/REKT-Mini repository on GitHub, at the commit this page was made from: the board is rotary-compresion-tool/rotary-compresion-tool.kicad_pcb and its schematic rotary-compresion-tool/rotary-compresion-tool.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Rotary compresion tool 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).