All Questions
Tagged with measurement resistors
23
questions
0
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1
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48
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How would I be able to measure the current using this setup?
What ways can I measure the current as test points on a circuit?
Would I need to add a zero ohm resistor and solder the resistor for normal operation and desolder the resistor and then place my ...
- 45
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41
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Current Sensing IC (MAX9929F) Query
I am using a MAX9929F Current sensing IC and I have a question to someone to may have used it before, or may have some experience with these types of circuits.
The circuit I built around the IC is the ...
0
votes
1
answer
156
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Current decreasing while measuring the current through a constant current source resistor
My Circuit :
The above is my circuit.
The Forward drop of LEDs is typically 2.8V and a maximum of 3.15V.
I designed the current through the string to be around 21mA, so the emitter resistor is ...
user220456
1
vote
1
answer
6k
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How does temperature compensation work for strain gauge in wheatstone bridge
Wheatstone bridge is used for temperature compensation for strain gauges
If 2 strain gauges are connected like this figure. Due to temperature variation; the resistance Rg will change in the same way....
- 159
1
vote
1
answer
87
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Measuring resistance
I would like to measure the resistance of a resistor in the most basic way by running a current through it and measuring current and voltage. I understand that I have basically two options to place ...
- 115
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0
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112
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HF current measurement
I have an assignment, where i'm supposed to (sort of accurately) measure the current drawn by a SIM-card, in the different phases it can operate in. The current is by no means DC, as the SIM-card ...
3
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5
answers
9k
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Measuring the resistance of a real inductor?
Real inductors can be represented as perfect inductor plus a series resistance \$R_s\$.
The impedance of this component is \$Z_{L+R_s}=R_s+j \omega L\$ therefore $$\frac{1}{Z_{L+R_s}}=\frac{1}{R_p}-\...
- 299
3
votes
3
answers
2k
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Measuring the impedance of a speaker
I want to measure the impedance of a speaker (by different frequencies). The idea to test it was the following, I have the follow circuit:
Now, in order to find the impedance I measured the voltage ...
- 49
0
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2
answers
151
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Which Multimeter is correct?
I have two Multimeteres that I'm using to measure resistance of a 10 Ohm resistor. Now, when i measure with the first one it's showing 10.2 Ohms while the other is constantly changing values from 9.9 ...
0
votes
1
answer
208
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why have the same V before and after resistor?
I'm starting in electronics, and some measurements are surprising to me...
Why i have the same V before and after a resistor? I've taken two photos to illustrate it, any advice will be very ...
- 11
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1
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454
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Measure resistance value between all nodes in a 3x3 resistor grid
I have a Schematic like that:
(except the power supply is an Arduino Uno with a voltage divider to measure resistance between any pair of ABC and 123, except C3 of course)
How can I get the ...
- 125
4
votes
2
answers
5k
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Choosing a Shunt Resistor for Low Current Applications
Is it possible to use a shunt monitor to measure current for low values(10 mA-100mA) and if is it possible, should I use low resistive values like in most of the power circuit applications? I know ...
user86045
1
vote
1
answer
292
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High resolution resistor measurement technique
I'm working on high resolution resistor measurement system. I need to detect %1 and %5 tolerance difference. Now I set the system typologies like pic1 via analog multiplexers.(ADG708, ADG732)
R1 is ...
- 13
4
votes
1
answer
2k
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Resistor wattage measurement
I'm not an engineer professionally but I'm interested in. So my question is, how to recognise the wattage of a resister? And how to measure it using multimeter?
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2
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5
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1k
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Measuring a huge resistance on low voltage
I was thinking on this theoretical experiment for a while, but nothing useful came into my mind.
We have a "resistor" (rather a material like plastic) with a resistance expected to be very high, say ...
- 437