All Questions
Tagged with measurement power-supply
26
questions
0
votes
2
answers
85
views
Why might my circuit's measured voltage drop when I add more load to it?
I have one of these power supplies:
I also have an MCR-4V data logger:
If I connect wires directly from the power supply to the data logger (red to red, black to black), then the voltage output on ...
- 113
0
votes
0
answers
52
views
What could be the possible reason for waveform distortion while connecting differential probe GND with single ended probe GND?
I am measuring following waveforms using a DSO:
Case 1:
Waveform 1 wrt GND using differtial probe.
Waveform 2 wrt GND using single ended probe.
Result 1: Waveform 1 distorted.
Case 2:
Waveform 1 wrt ...
- 3,032
5
votes
1
answer
124
views
Can I use 12 V and -12 V together?
I am sorry if this question is pretty easy but I am a beginner.
I have a PC PSU that provides two lines:
12 V 11A
-12 V 1.5A
If I used them together will I get 24V, and how many amps can they provide?...
4
votes
3
answers
419
views
Frequency analyzer for loop gain measurement - Why should the injection point have low output impedance and high input impedance?
@5:08 The video mentions:
"The insertion point should have a low output impedance and high input impedance"
What is the background for this condition?
- 3,032
0
votes
3
answers
183
views
Supplying and measuring from current transformer
I need to provide supply voltage to take measurements and also get measured signal from same current transformer, which will be placed on AC line. Current transformer parameters, such as internal ...
0
votes
1
answer
80
views
Help needed in understanding the lab observation regarding a diode
I was trying to understand the connections in a power supply board.
It was found that anode of below diode is connected to GND and -ve terminal of bulk capacitor.
Cathode of diode is connected to +ve ...
- 3,032
0
votes
0
answers
51
views
"Wild" surge of solar panel current in the mppt-controller model
I ask the help of electrical engineers.
I am developing a model of an MPPT-controller, the model has not yet been completed (only DC-DC, the load and the panel itself are connected). I do it in ...
- 117
1
vote
1
answer
102
views
How to use a pressure sensor (transducer)? [closed]
I have this pair of pressure sensors that are addressable transducers. I want to use them for a project but I don´t really get how to get them to work. I´m used to the type of sensor that has 3 cables(...
0
votes
2
answers
406
views
What to look for in an isolation transformer?
What do you want from an (isolation) transformer besides it having the minimum voltage/current/power(/frequency?) specs that the to be isolated device needs? Does it matter whether the transformer is ...
- 509
0
votes
1
answer
5k
views
Converting negative DC voltage to positive equivalent
Requesting some input on this topic which has already been discussed (partially for my requirement) here:
Negative to Positive Voltage Converter
I also have a positive-only display and I need to ...
2
votes
1
answer
2k
views
Calculating AC Input Power
I'm making an AC to DC power supply that connects to mains. There's an AC to DC converter, buck converter and a smoothing LDO that outputs a DC controlled with pots.
I'm verifying the supply, and ...
- 288
1
vote
4
answers
10k
views
Precision Power Supply / Elektor, December, 1982
Since this PSU was published by Elektor I assume that some of you might heard or read about this project.
http://www.retro.co.za/zs1ke/projects/PrecisionPowerSupply/PrecisionPSU-Elektor-Dec-1982.pdf
...
- 2,432
1
vote
1
answer
1k
views
Measuring loop Gain and phase of of a flyback converter
I have a flyback converter based of the LT3798. The converter takes a rectified AC (120Vac,60Hz) and steps it down to 24Vdc. It uses a third winding on the transformer to power the IC and to generate ...
- 11
1
vote
2
answers
232
views
System Grounding and Mixed Supply Grounding
I'm attempting to prototype this curve tracer (http://www.vintage-radio.info/download.php?id=224) mainly following the original design, but altering it to suit my own requirements (serial connection ...
- 1,694
2
votes
2
answers
589
views
Measuring Power Consumption of a Mixed-Voltage Device
TL;DR
How can I measure the power consumption of a system that uses power supplies with multiple voltage outputs?
Background
I need to perform some power consumption tests on a desktop computer. I ...
- 840