All Questions
Tagged with current-limiting power-supply
82
questions
0
votes
2
answers
1k
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Meanwell RT125D supply behaviour
I am using a meanwell RT125D power supply which has
230 V AC input and 3 O/P i.e. 5V, 12V and 24V.
While I used the supply, without any load, the behaviour of ...
1
vote
0
answers
156
views
What's wrong with my SMPS circuit?
I've proto-typed a switch mode power supply with variable voltage and current control using a MAX1763 IC. I've powered it on and for the most part it works great, I can control the voltage using the ...
- 539
-1
votes
1
answer
224
views
Current and wattage overload
So, I have an extension cord reel with four outlets and current overload protection can handle a total of 2500W, 110V, 20A. Im confused about those specification because they do not add up but that's ...
- 15
0
votes
2
answers
2k
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Electrical power strips and current overloading
simulate this circuit – Schematic created using CircuitLab
Currently there is an extension cord that runs from the wall with 10kA. The current on the cord says 10 amps, 125 volts, and 1250 ...
- 15
0
votes
1
answer
666
views
Need some help about why this circuit (PSU) isn't working
Trying to make a current limiter for my LM317 power supply. This is the complete circuit:
I found the current limiting circuit on the web, I'am powering this circuit from a 12V 20A switching lab ...
- 483
1
vote
2
answers
227
views
Is there a theoretical limit to power supply transformation efficiency?
As I'm looking at some resistive-load applications I'm wondering whether there are any rules that put an upper-limit on supply-matching efficiency. Because if a load isn't matched to the power supply ...
- 2,432
-2
votes
1
answer
1k
views
Transistor - Control current flow
simulate this circuit – Schematic created using CircuitLab
I am having trouble finding how to limit the current flow from the collector to the emitter of a transistor. (Is it possible? I know ...
- 3
2
votes
2
answers
519
views
Where can I use my ammeter to measure the current set by the current limit potentiometer?
Here is the circuit in question:
(https://i.sstatic.net/qd0cD.png)
The circuit is an adjustable power supply that I have put together (can be bought here) and I am working on putting it all ...
- 39
0
votes
2
answers
821
views
How a sensor supply circuit should be? [closed]
i am looking for sensor supply circuit for a sensor. The sensor requires bipolar +-6V to -15V DC and 10 mA power consumption at 6V DC (6V*10mA=0.06mW). Also power supply of this sensor requires less ...
- 55
4
votes
2
answers
220
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Why sample current via lopsided resistive divider?
I'm studying the constant-current circuit of the Agilent E3610A 15V 30W DC Bench Power Supply. The entire schematic is at the end of the user manual, but I've redrawn the parts of interest here for ...
- 7,172
5
votes
1
answer
7k
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BJT Current limiter for linear power supply
I am trying to design a current limiter or my LM317 based power supply using this schema.
The power supply must be able to provide a maximum of 1.5A@30V.
I made some calculations and I would like to ...
- 561
7
votes
2
answers
6k
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How does this power supply circuit work?
This is the circuit of a power supply with adjustable output voltage and current, and I wish to understand how it works:
What I did understand:
R1 T1 VD5 - they form a voltage divider which provides ...
- 173
2
votes
1
answer
3k
views
USB cable current limit: wire or connector?
I am trying to power a device which requires 5V and 2A through a 5.5mm / 2.1 mm barrel jack connector. SInce I need the device to be portable I am using a battery bank like this: http://www.amazon.co....
- 21
1
vote
3
answers
364
views
User power supply current limit to avoid current limiting resistors for LED
everyone!
I would like to know if I can avoid to use current limiting resistors by pushing my power supply to its limits (it already sounds not like a good idea... btw...).
Say I have a 3.3V power ...
- 167
0
votes
2
answers
3k
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Limiting the current on a PC power supply
I want to use a PC power supply on three 12V stepper motors. The problem is that I want to limit the current of the 12V DC output to 3A maximum for each of the three motors. The power supply has 34A ...
- 1