Sun-powered polyphonic harp :: Music instrument I ever built & coded in the context of January 2022 Synthux Academy Hackathon. Software synthesizer Daisy Seed combined with 12 x capacitive sensor connected through conductive fiber with neodymium magnets attached to an upcycled metalic kitchen tablet. Audio out connected to a transducer (shaker) which uses kitchen table as the resonator. No battery, powered directly from the solar panel.
Solar boombox:
Code at https://github.com/hromi/SeedInstruments
Personal Primer is an AI-supported “Bildungsinstrument” aiming to harness advantages and possibilities offered by digital technologies for the purpose of education of elementary school pupils, most notably the acquisition of basic literacy (i.e. reading, writing, arithmetic) and promotion of informatic thinking. Currently, we have four prototypes satisfying 11 out of the 23 roadmap properties: embooked, unique, adaptable, modular, circadian, habit-disrupting, multimodal, speech-based, narrative, online-offline and monotasking. A concept of "human-machine peer learning" (HMPL) where human learns something from the machine (e.g. reading, foreign language) in the same time as machine learns something from the human (e.g. speech recognition model adaptation) is deployed in do-it-Yourself, book-like artefact narrating not only fables of ancient India.
Videos:
https://stream.udk-berlin.de/w/gxoTarC9PK3wdumKJ8gDzx (Prix Ars Electronica 2024 submission)
https://kastalia.medienhaus.udk-berlin.de/community/data/13068.fibel_interspeech_subtitle.mp4 (accepted InterSpeech 2023 submission)
A bamboo stick washed ashore on Playa Cocalito / Nicoya Peninsula / Costarica has been cut in 3 modules, smuggled into Europe and endowed with strong neodymium magnets so that modules form a whole again.
The hollow space within the module 1 is used as a contained for the radiation-detecting Müller tube connected to a fully functioning Arduino-based Geiger counter. Hoping that I will never need to use it elsewhere than to measure the radioactivity of uranium-glazed tiles at U-Bahn station Rosenthaler Platz, it's still wiser to be safe than sorry ...
The hollow space within the module 2 contains an Arduino Nano Connect system endowed with a battery, I2C gyroscope, speaker and a microphone. Based on the position of the tube, the microcontroller either records or plays back the audio buffer. The intention behind such "sonic imitation" is to research and establish communication with birds in the most natural way.
Note: Reassembled magic Wand 1 is present on the right side of the previous photo
Magic Wand 0 (MW0) is the main teacher artefact issued from the teacher.solar project. In its essence, MW0 is a headless - e.g. no screen and no keyboard - RaspberryPi computer attached and a solar Powerbank which serves as a main server to which students connect during diverse outdoor education (OE) sessions.
RaspberryPi has additional components - notably the GSM module and 4-microphone circular LED Respeaker HAT - attached to it. Software-wise, it runs a Raspbian Linux with additional systemd services (teacher.js, matrix-synapse, Janus, Kastalia KMS, nginx, bluesalsa u.s.w.) in order to provide completely autark OE experience.
The whole system is attached to an awkward piece of wood of unknown origin making the whole setup both piece of art and teacher instrument in the same time. Additional Arduino microcontroller with 12 different sensor types is also attached to the Wand.
MW0 is more closely described in \cite{hromadathree}.