[Tuomas Nylund] wanted a way to visualize the electromagnetic fields (EMF) around him. He figured the oscilloscope was the tool best suited for the task, but he needed a way to pick up the fields and feed them into one of the scope’s probes. He ended up building this EFM probe dongle to accomplish the task.
He admits that this isn’t much more than just an inductor connected to the probe and should not be used for serious measurements. But we think he’s selling himself short. It may not be what he considers precision, but the amplification circuit and filtering components he rolled into the device appear to provide very reliable input signals. We also appreciate the use of a BNC connector for easy interface. Check out the demo video after the break to see the EMF coming off of a soldering station controller, from a scanning LCD screen, and that of a switch-mode power supply.
“He figured the oscilloscope was the tool best suited for the task”
humm … spectrum analyzer and a piece of wire anyone ?
Spectrum analyzers are expensive. And besides, that wouldn’t be a hack…
Cute :P
I wonder when we will see ghost hunters use this to verify their paranormal activities…?
I always felt like someone was behind me when I turned on the LED switcher supply…
Wouldn’t that be tuned for a specific frequency or range?
E- and B- field probes are typically constructed out of specially-shorted loops of hardline coax. This is a combination E&B field probe, not just an E-field probe.
Reblogged this on txwikinger's blog.
Hello , I was giving a Tektronix oscilloscope , Would like to know if I can use this to detect paranormal activity.
Thanx for your time SLM.