For frantic hacking sessions where seconds count, this forearm mounted oscilloscope with fingertip probes built by [aniketdhole] might be just what you need. Well, maybe. It’s not immediately clear why you might want to wear an oscilloscope on your arm, and sticking your fingers inside of powered up electronic devices sounds specifically like something your mother probably told you not to do, but here it is anyway.
The scope consists of an nRF5340 evaluation board in a 3D printed mount, with an SPI-connected Adafruit 2.8″ TFT display on top. With a pair of wires run from the board’s ADC and ground pins, [aniketdhole] just needed a bit of code to glue it all together and show some basic signal visualizations on the display. It’s been tested against PWM signals generated by an Arduino and some potentiometer controlled voltages, but anything much wilder than that is probably a bit too much to ask for from this rig in its current configuration.
In the future, [aniketdhole] wants to add some step-down circuity so you can probe higher voltages than the nRF5340 can handle normally, as well as a shunt to allow current measurement. Once the hardware is in place, the next order of business will be an improved touch-capable user interface that lets the user adjust settings and switch between functions.
Even if you’re not sold on the idea of an arm-mounted oscilloscope, this is still an interesting platform for general wearable experimentation. Throw enough sensors into it, and we’re sure there’s more than a few hackers who wouldn’t mind strapping one of these on.
scary…
shocking….
“In the future, [aniketdhole] wants to add some step-down circuity so you can probe higher voltages…”
Very scary if he’s planning to probe mains voltages with bits of wire strapped to his fingers…
Yes , taking all safety precautions before. Thanks
Well to be fair “higher voltages” in this context means anything over 5VDC. If he could bump that to 12 or 24 volts, it would improve usability and still not pose any danger.
The burning smell tells you it’s live. (Even if your not.)
If you need to strap your scope to your arm, it might be time to de-clutter the work bench… :)
B^)
It must get kind of cramped up there behind your car dashboard if you bring your work bench with you.
i think all my scope tactics are in the exact opposite direction! sometimes it’s handy to hold the probe in my fingers but i’d absolutely rather use the little ic clip probes so i can play with the knobs on the scope without losing my place in the circuit
Nice form factor. I think a lead acid battery on the other arm would make this even more balanced.
Pppht. This is for wussies who need to go to the gym. Real geeks strap a tektronic bench scope to their arm.
More seriously…
I don’t particularly see the value of the wrist mount, but taping the probes to my fingers looks like a neat trick when you’re running out of hands to hold probes.
Nice! I can only think of two things that might make it better: Bluetooth probes mounted on a glove, and a voice interface so I can yell at the damn thing to grab a sample and change scale.
Resistance is futile. (Someone had to say it.)