Questions tagged [measure]
The measure tag has no summary.
8 questions
1 vote
0 answers
49 views
How to Detect CT Disconnection in a Leakage Current Measurement Circuit?
I'm building a circuit to measure current. The main idea is to use a current transformer (CT) to step down the current and then measure it using three different op-amps with different gain levels, ...
- 21
2 votes
2 answers
141 views
Resistances measure different inside the circuit
I made this circuit on the breadboard at the lab and I connected it to a lab psu which is powered off. From my understanding the 100k resistor which has one terminal at the +5V and the other to the ...
4 votes
2 answers
7k views
Multimeter Negative Resistance
I have a Fluke 87V multimeter and sometimes when I measure some resistors (in power supply PCBs I saw it) it shows me negative value of resistance. Why this? It is some flaw of the multimeter or it ...
- 853
1 vote
2 answers
105 views
Issues with Designed Capacity Measurement Circuit
I made a circuit to determine the capacity of an unknown capacitor. To test if the circuit is working I wanted to test it with a known capacity first. The circuit and the derivation for the ...
- 113
0 votes
1 answer
78 views
How to setup or find an impedance across the capacitor
I have a 1.8V circuitry with two parallel capacitors and please let me know how can I setup or find out the impedance across the capacitor C420.
0 votes
4 answers
445 views
What is a volt?
How a volt is measured and defined in the simplest terms? What does it mean when you measure voltage using a voltmeter? In the past, we defined things by physical things. For example, the kilogram ...
- 3
0 votes
0 answers
48 views
Battery capacity evaluation
To measure NiMH battery capacity, everything I've read so far indicates that in order to get an accurate evaluation you have to measure the discharge parameters. I can understand that, however in my ...
15 votes
2 answers
2k views
Why does the capacitance value of an MLCC (capacitor) increase after heating?
I have a general purpose MLCC capacitor design kit, which consists of capacitors of different values. I took a 2.2 µF (X5R, 16 V, +/- 20 %, -> this one) capacitor out of it and measured its ...
