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Vin on component shield direction


#1

I have the component shield on a FEZ domino. Is the Vin header used to get power FROM the 7-12V DC barrel jack connection, or can you use it instead of the barrel jack (power the FEZ with 7-12VDC from the Vin on the component shield). I don’t want to use the barrel jack because of space and have devices other than the FEZ getting powered from the same input source.


#2

You can use vin to get power or to supply power


#3

OK. Will the shield safely handle drawing ~1A at 7.5VDC at the Vin header with prime power coming from the DC barrel jack?


#4

It should be okay at 1A but if you are concerned about high current or the noise cause by motors if you are connecting any then it is a good practice to keep a separate power.


#5

Most motors indeed cause a lot of noise. You can either connect a hardware filter (if you have it embedded and just 1 power supply) or just use a 2nd power supply.

I always separate electronics and motors.


#6

I’m running a separate 5VDC power supply off of the 7.5V prime that shouldn’t draw more than 800mA. I just wanted to be able to have 1 input so everything would have a common return for noise rejection purposes and to make my life easier. Thanks for the replies.