Zach McGinty has open-sourced a functional transcranial magnetic stimulation device on GitHub under the name OpenTMS. TMS is FDA-approved for treating drug-resistant depression, and it works by firing intense magnetic pulses through coils placed against the skull to modulate neural activity. McGinty built the real thing, not a toy replica.
The hardware is serious. The coils are wound from hollow copper pipe and liquid-cooled, matching clinical design practice. The power supply uses two microwave oven transformers switched through IGBTs in a flyback configuration, producing kiloamp-range pulses. Gate control is isolated via fiber optics. McGinty is explicit: this is not a medical device, not FDA-cleared, and you build from his schematics entirely at your own risk.
Read the full GitHub repository, not just the summary. The engineering rationale behind the IGBT switching topology, the coil geometry choices, and the thermal management decisions are where the real information lives. This sits alongside other open-source medical hardware like ESP32 EEG builds and open sip-and-puff interfaces, but the energy levels here are categorically higher. Proceed with that fact clearly in mind.
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