All Questions
Tagged with current-limiting power-supply
82
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What values of components to use in this 30V-2V, 3A(max) current limiting circuit?
I'm looking for a current limiting circuit for my lab bench PSU, and found this one.
What are the values for the components? Is R_sense the pot?
Thanks in advance!
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Adjustable L200 PSU Help
I want to build myself an adjustable bench power supply with adjustable current limiting, mainly for fun but also because I want something to help me with prototyping. I have previously built small ...
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3
answers
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Switching circuit for driving LED at different current values
simulate this circuit – Schematic created using CircuitLab
Above schematic is for limiting current to 4A when battery is connected to LEDs.
Datasheet of LED(BXRA-56C5300H 50W) are 23.5 Vf and 2....
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MOSFET Based Current Limiter
I know this question is not new, in fact I learned the basics of this circuit from sites including this one. However I am planning on making a PCB with it and do not have the luxury of multiple ...
user56054
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1
answer
65
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Stepping down voltage
I have a LiPo that is 1800mAh,25C,11.1V. it can supply a current of 1.8*25 = 45A. I need a current of 3.5A to drive a LOAD(a Nichrome wire of length 5-6cm) and 7.4V. How do i proceed with this ?
I ...
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1
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402
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Power supply voltage climbs after disconnection
I've got a motor controller for a Bldc and I'm in the process of tuning the controller with both PWM frequency, duty cycle and commutation frequency.
Anyway, this power supply is a 30v 10A supply and ...
- 485
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2
answers
2k
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How can I limit the current on this circuit?
I'm trying to overclock my PC and I'd like to limit the current without losing voltage (small drop ok). I have a 12V/.3A water pump and an old 12V/1A nokia phone charger.
Would something like this ...
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3
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How to limit current for voltage regulator/decrease power dissipation?
I need to power a 5V device that needs more or less 1.2A in order to work correctly. I'm using a 13.8V power source with two diodes in series (1N4007) to limit the voltage to roughly 12V. I tried ...
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2
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power limiting peltiers [closed]
I am trying to power a set of peltiers and am having some concerns, while I have a computer power supply I can dedicate to the product these are often high in the amps they can deliver, and the ...
1
vote
2
answers
2k
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Digital voltage/current controller for DIY bench power supply
I'm trying to design a portable rechargeable bench power supply. I have a 12V sealed lead-acid battery (WP7.2-12) which I can use as the main power source. These batteries are cheap and easy to ...
- 2,696
1
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1
answer
407
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Selecting correct current limiting device [closed]
Requirement: During an external test 20W of power will be drawn from my supply circuitry for 1 minute. My mission is to implement a solution that limits the power draw to a level below 20W in under ...
3
votes
3
answers
4k
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Precise Current Limiting for Variable 0–300VDC Supply
I wish to use this circuit
to achieve a variable 0–300V DC supply. However, I'm interested in keeping the current below 50 mA, with as little variance from that value as I can achieve without doing ...
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0
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505
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LTC3780 voltage/current limit indicator
I recently bought an LTC3780 circuit from China to build a variable power supply.
I would also like to have voltage/current limit LED indicator there but every tutorial I found on the internet ...
user137905
-3
votes
1
answer
102
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Can I power a device with a power supply that has a higher current rating? [duplicate]
I have a device with an input rating of 23 to 56V DC with a maximum current of 0.5 amperes. Is it possible to supply this device with a power supply with an output rating of 48V DC with 1.0 ampere?
1
vote
1
answer
140
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Alternative to opto-isolators on equally powered circuits
I'm a hobby electrical noob. I'm playing with my Arduino to trigger shutter on my DSLR. I have read many tutorials to do so. Many of them recommends using Opto-isolators to separate Arduino from DSLR ...
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