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Current limiting value

StephenByrom

May 10, 2016
2
Joined
May 10, 2016
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2
Hi,
I am recently retired and want to take up basic hobby electronics, so I have bought a bench-top power supply unit for testing and prototyping. The supply unit I bought (http://www.maplin.ie/p/100w-slim-bench-power-supply-n93cx), is a budget one until I gain a lot more experience.
I presently have extremely limited experience but hey,... you're never too old to learn.
My question is this;
Most of my projects will be driven in the real world with a 12V power supply, so that setting is pretty simple, but what should I set the "Current Limiting Value" at?
I can appreciate that this probably depends on the project, but is there a "rule of thumb" formula that I could calculate myself? Or is it dependent on the LED's or other components used?
 

davenn

Moderator
Sep 5, 2009
14,040
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Sep 5, 2009
Messages
14,040
Hi Stephen
welcome to EP :)

I can appreciate that this probably depends on the project

yes, that is your answer
but remember a 200mA drawing project will still only draw 200mA regardless of if it is powered from a PSU capable of 200mA, 1A or 10A

since your PSU has got current limiting, just set it for a little higher than what the circuit requires to operate correctly

Dave
 

dorke

Jun 20, 2015
2,342
Joined
Jun 20, 2015
Messages
2,342
For the first time you connect a newly-build project .
I would set the current limit at zero,
then gradually make it higher till it gets a bit above what is required by the project (like Dave suggested).
It may save you smoke,fireworks and devices....;)
 
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