SDR Console
I recently came across a nice SDR program called SDR Console (Windows only).
It also works with the cheap RTL-SDR USB dongles.
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Lol. I need all the light i can get sometimes.
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Hi All,
I have been attempting to measure current consumption of a node using a Brymen BM869s in series with a battery and it continuously causes the node to crash a random intervals. When I take multimeter out of the circuit the node runs fine.
Anyone have any tips ?
Thanks,
Serge
Multimeters are using a shunt resistor to measure current which causes a voltage drop, so your node does not get enough voltage for stable operation.
Avoid using your multimeter on “smaller” scales, as the shunt resistance is higher.
Use the multimeter on the highest current range 200mA or more.
If you still get problems then get a uCurrent;
Bummer, had I known that I would have spared some cash. And here I though I was going to be able to measure current in the Micro Amps now…
If you still get problems then get a uCurrent;
I would have a long time ago but they are not for sale anymore, at least I have not been able to find one. They are working on their own multimeter however its a Kickstarter and not generally available at the moment.
Thanks Guys
I Ordered 5 days ago but my order is still “On Hold” Do you have any experience with that seller?
*snip
Maybe not the same processor, yours is happier with a voltage drop 
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Mine didn’t arrive at all (ordered Apr 19th)…
The real problem is the shipping, the tracking is very cryptic and not updated frequently. Dropped a mail to Simon, waiting for an answer…
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hmmm… So what currents are you attempting to measure with this relative cheap tool ? in the nA range ?
I sometimes use the RECR mode high/low/avg
I got mine there.
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The issue is that I have a Bluethooth module on the PCB as well as the RN2483 so any of these could be low voltage sensitive and cause the app to “crash”. When I say crash it means that the application is not running as it should. The currents I am observing during the short time it works is 17mA in active state and 70-100uA in sleep mode.
I did some current measurements on RN2483 and can’t remember having the same issue (also a little capacitor did miracles) … could it be that the BT chip is sensitive for your hand+pen that is measuring
Well I was not even touching the probes or anything, they are “clipped” into the power circuit. I will certainly be performing more tests, also with chip and PCB models.
Great:
My µCurrent arrived last week, 11 days after ordering from the website.
So no complaints here…