Hello, And my first question about current.

Thread Starter

Rbelec

Joined Sep 28, 2016
4
Hi Everyone, I'm a new student in electronics. I just purchased a power supply and I'm learning how to use it.

I found that when I adjust the current knob on the power supply, I get a 0 reading on the screen. When I connect a multimeter, I am able to get a current reading from 0-3 A, as it should be according to the spec on the power supply.. It seems to complete the circuit when I connect the meter. Then I created a simple circuit with 2 resistors and some wire. I found that as I connected the meter in various places, I would get a reading of .01A on the meter and a 0 with a blinking minus sign on the power supply, no matter what I did with the current knob.. What is happening here?
-Ryan
 

Thread Starter

Rbelec

Joined Sep 28, 2016
4
I think I figured it out. Not enough current is being supplied for the meter reading. Lets try upping the voltage..Yep, that was it!
 

twiese86

Joined Sep 29, 2016
3
Think of current like the flow of water through a pipe, except instead of water, you're flowing electrons. Voltage can be equated through pressure that the water exerts on the ID of the pipe(although this is a slight oversimplification). Without the meter connected, there is no pipe, therefore no current flow. Which is why your indicator is zero.
 
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