EngineeringPortfolio

Engineering notebook / project archive

Johannes Prettenthaler

Highschool student and Innovator

I am a hardware enthusiast and aspiring engineer based in Graz, Austria. My passion lies at the intersection of electrical engineering, CAD, and practical problem-solving. I love bringing ideas into the physical world. Having already expanded my theoretical foundation through university-level physics coursework, I am currently building my skills as I prepare to pursue a degree in engineering. Welcome to my project documentation.

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Published records
3
Engineering areas
4
Latest entry
2026

Project register

Selected projects

  • Installed 3D-printed optical filament sensor assembly on an Ender 3 V2, with the filament spool and guide hardware visible.

    Project2026

    Optical Filament Sensor

    A custom, non-contact optical filament runout sensor for an Ender 3 V2 that pauses prints and sends Discord alerts.

    Mechanical Design · Electronics · Software

    • Honeywell HOA0865-L51
    • Klipper
    • Discord Webhook API
  • Angled 3D render of the audio HAT showing two 3.5 mm audio jacks, G6S-2 relay, PCM5102A circuitry, two buttons, and Raspberry Pi header.

    Deep Dive2025

    PCM5102A Raspberry Pi Audio HAT

    Custom Raspberry Pi audio board combining a PCM5102A I²S DAC with relay switching between DAC audio and an external stereo input.

    Electronics · Embedded Systems

    • Raspberry Pi Zero 2 W
    • PCM5102A
    • EasyEDA Pro
  • Picture of the Lamp attached to the boom arm

    Quick Build2026

    DIY Soldering Lamp

    A budget-friendly adjustable desk lamp built from a used Tonor microphone arm and an IKEA Mörker lamp using a custom Fusion 360 adapter.

    Mechanical Design

    • Autodesk Fusion 360
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Areas of work

Engineering areas

Browse the archive by the broad disciplines represented in published work.