Questions About Selecting a Shunt Resistor

Just about everything about everything else
Forum rules
Be nice to others.
Post Reply
Posts: 3
Joined: Mon Aug 22, 2016 3:42 am

Questions About Selecting a Shunt Resistor

Post by pololo » Thu Oct 07, 2021 8:11 am

I'm attempting to perform power analysis on my target, which operates at 3.3 volts. The average current while running is around 140mA without the resistor.

With a 5V power source, I utilized a 10Ohm resistor as a shunt resistor. The shunt resistor was connected between 5V and the target VCC pin, and the voltage difference between VCC PIN and GND was measured. (The decoupling caps have been taken out.) The oscilloscope, on the other hand, did not provide a suitable power consumption line.

Is something wrong with my setup? Is there any advice on selecting a shunt resistor?

I’ve read some articles like ... istor.html, but I still have no idea.

Thank you so much for your assistance!

User avatar
Site Admin
Posts: 667
Joined: Wed Mar 26, 2014 7:04 pm

Re: Questions About Selecting a Shunt Resistor

Post by redpitaya » Tue Feb 07, 2023 11:08 am

Try using a 50 Ohm shunt resistor. You might get better results because the output filter of the Red Pitaya is set for a 50-Ohm load. ... e-analyser

Post Reply
jadalnie klasyczne ekskluzywne meble wypoczynkowe do salonu ekskluzywne meble tapicerowane ekskluzywne meble do sypialni ekskluzywne meble włoskie

Who is online

Users browsing this forum: No registered users and 1 guest