All Questions
Tagged with measurement resistance
58
questions
1
vote
1
answer
96
views
Resistance measurement with DMMs
I had one doubt regarding resistance measurement from multimeters. I cannot show the schematic because it is confidential but I have added a circuit diagram. It refers to a gate driver circuit.
I am ...
- 275
0
votes
2
answers
153
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How can I find the diameter of a wire if I have the length and resistance? I cannot use measuring tool because wire is thinner than 0.1 mm
As the title suggests; I am trying to calculate the diameter of a wire given its length and resistance.
Specifications:
Length: 30.4 cm
Resistance: 17 Ω
- 117
0
votes
2
answers
62
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Can I measure pinholes in a dielectric layer using LCR meter?
I have a thin dielectric film (~1 um) and I want to measure the quality of the film in terms of not allowing leakage current through pinholes. Can I use an LCR meter for this purpose? If yes, how? If ...
7
votes
4
answers
5k
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Why does my multimeter measure different resistance values?
I am trying to find a fault on a multilayer board currently. I use mostly my multimeter in buzzer mode and came across such a situation.
When I measured a 1 kΩ resistor in buzzer mode it didn't beep ...
- 95
2
votes
6
answers
2k
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How to measure AC resistance of an inductor?
Say I found an toroid inductor lying around, what is the method of estimating its AC resistance? DC resistance is easy to know, so is its inductance. Is it essential that I have information about the ...
- 749
3
votes
2
answers
161
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Can I build a circuit to measure the resistance of common gemstones?
I would like to build a small, portable device that (as part of its operation) measures the resistance of common gemstones.
I don't care about accuracy - I don't want to try and identify what sort of ...
- 616
-1
votes
1
answer
93
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Multimeter resistance measurement
I was doing a short and resistance test in my circuit on testpoints. I was testing the output of a voltage regulator.
When I place the + probe on the power and - probe to ground the meter takes time ...
- 379
4
votes
3
answers
2k
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For measuring a resistance should you use a constant current source or a voltage source?
I need to design a PCB to measure a resistance of around 5 kΩ and a resistance of 0.2 Ω. I don't know what the best solution for measuring these resistances is; maybe a combination of both methods?
To ...
2
votes
2
answers
326
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4 wire resistance measurement
I need to check the resistance of a test point (TP) through a 4 wire system. I know and understand the theory behind it, but how do I put it into an Altium schematic? I have the voltage measurement ...
- 51
2
votes
3
answers
579
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Resistance bridge for low-resistance sensor
I have a fuel tank sensor that reports the remaining fuel with a resistance between 10 ohms (empty) and 180 ohms (full). I want to read this value using the Analog In of an Arduino (or ADS1115, not a ...
- 692
0
votes
1
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236
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Internal resistance measurement algorithm using DC method
I have a circuit that allows me to add a load to a battery and measure the voltage, current and temperature of the battery. I am trying to derive what is the best method for measuring the internal ...
- 1,679
0
votes
2
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532
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Measure Coil Resistance of a Large Transformer
I have a large transformer and I want to measure its coil resistance to find the primary and secondary. I set my multimeter in the 2000 ohm setting and measure. At first, it reads 500 something, and ...
1
vote
2
answers
263
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How do I accurately measure the B value of an NTC thermistor?
I'm trying to find a part number for an NTC thermistor being used to monitor the temperature of a rechargeable battery. The thermistor I have has no color markings or numbers to indicate any ...
- 13
0
votes
0
answers
40
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Measuring conductance of the material used in fabricating Antenna
I have a composite polymer material with injected conductive particles inside it, making it a not-so-perfect conductor. I have also fabricated a simple dipole antenna using the wires made of the ...
- 31
10
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3
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12k
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Understanding capacitance in oscilloscope probe tip
I am trying to understand the capacitance and resistance in oscilloscope probe tip.
In the above attached image, that 9Mohm resistance is used for that 1x and 10x setting that divides the input ...
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