• completed 176 sensors on the open source hybrid piano

    Greg Zweigle • 06/01/2025 at 17:45 • 0 comments

    Now have 88 hammer sensors + 88 damper sensors.

    Also fixed bugs with integration of hammer and damper sensor data.

    Its a milestone and sets the piano up for the next stage of project.

  • Project History Log

    Greg Zweigle • 05/03/2025 at 11:29 • 0 comments

    May 2, 2025 - New Sensors

    Convert all piano hammer position sensors to the latest hardware design.

    November 29, 2024 - First Independent Build

    A second open-hybrid-piano, directly from GitHub artifacts. Independent validation I got everything pushed to GitHub correctly. 

    April 21, 2024 - Accuracy Improvement Improve note-to-note consistency.

    Eliminate trimming resistors (see above: continued to use many of old sensors until May 2, 2025).

    November 26, 2023 - Open Source Hybrid Piano, Digital Architecture

    Finished pushing all files to the repository.

    November 10, 2023 - Finish "Stem Piano G"

    First time a full 88 key piano with the simpler architecture is functional. This is the architecture on GitHub on Nov 26, 2023 and documented on GitHub.

    March 16, 2023 - First 88 Key Piano

    First time my full 88 key piano is functional, including pedals. Built from a mix of two architectures. Neither of these designs is presently in use. But they remain interesting for future development.

    March 7, 2023 - Single Board Architecture

    First piano subset for the single board architecture.

    January 15, 2023 - Pedals First working with three pedals.

    July 8, 2022 - High Performance Architecture

    First piano subset with the high performance architecture.  Expensive and complex.

    January 2, 2022 - Started Open Source

    Created repository.

    July 24, 2021 - Eight Piano Keys

    My first working piano with more than one note.

    June 11, 2021 - First Datapath

    Full data path is functional, one note.

    December 5, 2020 - Start Project