EMF Probe

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06/18/2025 - Recently updated with better explanation.Here is a stripboard layout that I did for cassette player speed mods....

POTAR June 19, 2025

I created a backup site of the excellent Microphonium Schematic Archive. The sdiy.com domain that it resides at is up...

POTAR June 8, 2025

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POTAR April 9, 2025

Sound Urchin Composer series instruments are always a little differentThey all feature resonant bowls, tiered threaded rods, and the...

POTAR March 19, 2025

NEW from POTAR Design!The latest in Sound Urchin technology, the COLONY. Three urchins perched at different heights, affecting both pitch...

POTAR March 17, 2025

I have been wanting to experiment with ambisonic recording for some time now. The barrier to entry has always been...

POTAR February 18, 2025

Electromagnetic Frequency Probe (EMF pickup)