Questions tagged [resistance-measurement]
The resistance-measurement tag has no summary.
15 questions
0
votes
3
answers
175
views
How can I get the equivalent resistance between any two terminals when there are more than two terminals in a circuit?
For these two circuits, in circuit 1, what are the equivalent resistances between the terminals a and b and between the terminals a and c?
For circuit 2, equivalent resistance between:
a and b
a and ...
0
votes
1
answer
103
views
Predicting resistance measurement error
I am dealing with a setup where resistance of a resistive DUT (Device Under Test) is measured by sourcing some current through the DUT from a current source and by measuring the voltage drop across ...
- 197
-1
votes
2
answers
67
views
Using effects that make a voltage plateau as a reference resistor
As part of an undergraduate class, I am tasked with creating a device that can be used to implement a resistivity standard and calibrate an ohmmeter or a resistance in the 1-100 k\$\Omega\$ range.
My ...
- 101
0
votes
4
answers
301
views
How to measure multiple resistances with Arduino Uno, without one measurement influencing the other?
I'm working on a project where I aim to measure resistances using an Arduino Uno. I started with two separate voltage dividers, each using a 1 MOhm reference resistor, connected to a common Arduino ...
- 43
7
votes
4
answers
938
views
Characteristic impedance of a BNC jack to jack adapter
I have this BNC jack to jack adapter. I want to measure its impedance but I am reading around 1mΩ. The datasheet says that it is a 50Ω adapter.
Why am I measuring such a low resistance?
- 324
2
votes
1
answer
192
views
Art of Electronics - Confused about Zener Diode voltage formula
Working through Art of Electronics and the section on Zener diodes confuses me. There's another question about this section on the site (Art of Electronics - Zener Diode Example), but I'm still ...
- 43
1
vote
2
answers
352
views
How can I describe the loading effect of an ohmmeter?
How can I describe the loading effect in an ohmmeter? I've been given an assignment with this question, and I tried to look it up on the internet but could find no other material apart from loading ...
2
votes
1
answer
307
views
Multimeter resistance measure repair
I have ancient multimeter, recently the resistance range shows very incorrect values (or nothing). I have schematics and started to analyze, but can not identify how the resistance measure works.
...
0
votes
0
answers
135
views
Higher Resistance Measurement on Wet Tongue than Dry Tongue?
I'm trying to start learning about electrical engineering as a hobby. I'm reading from a book right now, and it suggests using my multimeter to measure the resistance of my tongue while it's wet and ...
- 1
3
votes
3
answers
308
views
Measuring low resistance (0.1 Ω range)
The application is to light up numbers of LEDs depending on the measured resistance, eg. 1 LED for 0.1 Ω / 2 LEDs for 0.2 Ω.
I'm quite new to circuitry so I'm thinking of using four terminal sensing ...
user337808
1
vote
0
answers
2k
views
Solve the current theough 15Ω load resistance using Norton's theorem
Here, I am asked to find out the current through the 15 ohm load resistor (the resistor on the extreme right) using Norton's theorem. I have proceeded with the sum and found out the Norton's ...
- 11
3
votes
2
answers
838
views
How can I test a variable resistor, while it is still in the circuit board? [closed]
How can I test a variable resistor, in the circuit? It is a 6p1 102, The ohms I am getting are approximately 1700 ohms. Is this normal for still being on the PC board? Adjustment knob appears to be ...
- 51
-1
votes
1
answer
103
views
Measure resistance
What's the simplest way to measure the resistance between two inputs and turn on the appropriate LED:
0Ω
≤
R ≤
1kΩ
... output = RED
10kΩ
≤
R ≤
100kΩ
.... output = YELLOW
1MΩ
≤
R ≤
∞
... output = GREEN
...
- 225
0
votes
4
answers
582
views
Measuring outside of multimeter range
While preparing a measuring setup for a project, I've realized that the multimeter our lab can provide only supports resistance measurements up to 10^8 Ohm. Since the materials we want to measure go ...
- 3
3
votes
4
answers
3k
views
Resistor switching methods
I have an application where I need to measure the voltage drop over a resistor that varies between 10 ohm - 50 kohm. As I have this set up as a voltage divider, with the result being read by an AtoD, ...
- 12.4k