demo of using a raspberry PI as a pemf frequency pattern controller
a sweep frequency from 10pps to 50pps to 10pps REPEAT is issued by a python program written by chatGPT. it uses 2 GPIO pins and 2 solid state relays(SSR) one SSR controls the triggering of the SCR gate that dumps the cap joules into the PEMF COIL, the other SSR turns on/off the power supply to the PEMF capacitive discharge circuit....the output waveform from the coil is the typical resonant damped sine wave with exponential decay due to resonance between the CAP and the inductance of the COIL

SSR RELAYs used in this setup:
1. here is the SSR that has a very fast turn on time for the SCR GATE triggering...
i used 50 μs pulse width per pulse, at GPIO PIN 18 output, to trigger SCR GATE ...
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2. here is the SSR that i used to turn ON the power supply of the CAP DISCHARGE CIRCUIT
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can handle up to 6 amps(from specs on mouser page)

here is a sky view of the whole hardware modular PEMF device TEST SETUP on a TABLE
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NOTE: both relays have an LED input that takes very little current to run, ie 10 milliamps is all that is needed to turn both SCR outputs ON fully with low resistance... there is plenty of power in the 3.3v GPIO pins to handle 10 mA
current draw

here is the python GPIO PEMF controller file if you would like to take a look:
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PYTHON TERMINAL COMMAND STRUCTURE
python3 xxxxxx.py (sweep_duration in seconds) (min_freq in hz) (max_freq in hz) (pulse_width in μs)
in this video demo python3 scrsweep3.py 10 10 50 50

for more examples of DiY PEMF SETUPs, see this playlist:
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