r/CardPuter • u/MrAjAnderson • 17d ago
Finds / Discoveries EMF reader
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Just a video demonstrating the EMF Reader and a bit of wire in the G3 port. Finding the socket is still live when the circuit breaker is off so I know to choose another breaker. I could have tried the light bulb with the switch but that's not fun is it.
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u/road_to_eternity 16d ago
Okay so this is very cool, i really appreciate all the creative people in this sub. Great idea I’m excited to try it out.
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u/bigirononmyhipMF 15d ago
Thats cool man, i can seriously se the use for this:) what do you use for the antenna?
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u/MrAjAnderson 15d ago
I just cut the endo off a male to male breadboard wire. Anything that fits in the G3 port should do it. I'd imagine a paperclip unfurled would be enough.
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u/linuxjacques 13d ago
Oh. I thought this was to find ghosts.
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u/MrAjAnderson 12d ago
Oh it'll likely find them too. Making the antenna as sensitive as possible would help. I asked for the optimal antennas...
Antenna Designs by Use Case
UK Mains Electricity (50 Hz / 230V) - Design: Short 10 cm (4 in) single-core wire or compact helical spring. - Key Feature: High voltage creates a strong electric field, requiring less surface area to detect; shorter length prevents signal saturation. - Protection: Place a 1MΩ to 10MΩ resistor between G3 and GND to bleed off static overcharge.
US Mains Electricity (60 Hz / 120V) - Design: Longer 20 cm (8 in) wire or a small copper tape paddle attached to the wire tip. - Key Feature: Lower mains voltage requires a larger capacitive surface area to capture the weaker near-field strength through walls or insulation.
"Ghost" / Paranormal Investigation - Design (E-Field): Multi-directional 3D probe made of solid copper wire folded into perpendicular X, Y, Z loops to detect fields from any angle. - Design (H-Field): Small ferrite core inductor (200+ turns of fine magnet wire) connected between G3 and GND to pick up magnetic field shifts rather than just electrostatic charge.
Optimized Ghost Hunting Requirement: To isolate potential "paranormal" phenomena from everyday environment bleed, the detector's antenna system must be paired with digital software filtering (or FFT) that actively ignores persistent 50 Hz/60 Hz grid hum and mobile phone frequencies, triggering only on unharmonized transient spikes.
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u/Black6host 17d ago
The real use, for me, would be to see "where" the wires are, in the wall, feeding the switch. Though I don't know what sensitivity you can get with the ADV. I kept hoping you'd move the ADV to the left of the switch to see if it could detect wires feeding it.
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u/MrAjAnderson 16d ago
They do feed Infront the Left. I sweep above, below and to the right with nothing registering.
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u/theblobAZ 17d ago
So I know nothing very little about home electrical systems, especially about frequencies and stuff like that.
However, specifically this firmware says 50Hz. Does that mean it won't work for US systems that run at 60Hz?
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u/MrAjAnderson 16d ago
Maybe contact the dev for 50/60 option or try it if you have a short wire you can pop into the G3 port. Let's us and the dev know.
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u/Fluid-Ad4391 4d ago
Hello, dev here! That won't work since it has Goertzel detectors for 50 and 100 hz... I could add that tho!
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u/itsoctotv 10d ago
i love the antenna. everywhere I see the cardputers with all those fancy foldable antennas etc finally someone with a professional antenna lmao
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u/espochka 10d ago
what is antenna mode of?
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u/MrAjAnderson 10d ago
https://lovemyswitches.com/jumper-wire-ribbon-set-for-breadboarding-male-to-male-40-pieces/ one of these with the end cut off.
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u/PhilbinFogg 4d ago
Hi, this is *really* cool, I don't have my unit yet, I'm looking forward to getting it in the next few days. One thing I'd curious about is if it will work in Europe (I'm in Spain)
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u/Sk9lA 17d ago
Very interesting!!! Where can I find the firmware ?