Electronics > Projects, Designs, and Technical Stuff
DIY DC Current Probe?
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capt bullshot:
AFAIK, sensitec senses the field gradient from the u-shaped conductor. So in theory, they are insensitive to more homogenous fields from distant conductors or e.g. earth magnetic field. What matters is the distance of the conductor, the more the better. Can easily be evaluated by placing a (AC) current conducting wire next to the sensor and moving this wire around while there is zero current in the sense conductor.
0xdeadbeef:
For the protocol: finally finished my first box...
Jeroen3:
It looks great  :-+. But does it work?

I'm still at renderings, I've been having way too much fun learning 3D cad.  :P
But the parts are ordered. It's roughly the same size, but a standard enclosure instead of 3D printed. Since I will have to make a few for at work if it proves a success.

0xdeadbeef:
The tests I did up to now were successful. Like I tested the SMD part without the sensor and now a quick DC current test with the sensor.
I.e. the first LED lights up somewhere slightly above 1A. If the current->voltage conversion fully works as expected with high bandwidth is something I can only test later this week at work.

About the case: yeah, I wasted hours and hours looking for a fitting off-the-shelf box. I finally gave up for the moment as the best one I found was much too large in X/Y dimension (note that my box needs to be pretty high - my printed one has an inner (!) height of 45mm).

BTW: what about some air vents?
Jeroen3:
I'll try without vents first. Since I noticed most of the heat came from poor contact in the test breadboard.
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