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Need help to understand if I can share a power supply

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briank

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I have a small video camera to monitor the front of my house which I have connected together with a simple RF modulator kit inline from my tv aeiral so I can watch the camera from any tv in the house. Currently the camera and the modulator are both using their own 12V 1A power supply, but im pretty sure they only draw a couple 100ma each. I want to setup a second camera+modulator but I havent got any more power supplies so I was wondering if I could wire up a single power supply to feed both the camera and modulator... should the wireing simply to in serial? or should they be wired in parallel? (its been too long!) ... or is it a complete No No... :)

any info/pointers much appreciated...

Cheers!
 

Connect both circuits in parallel ..
If you can, try to add 0.5A fuse for each circuit ..
Regards,
IanP
 

Indeed, both circuits should be connected in parallel since both requires 12V supply.
 

You should be carefull about the total current required by the equipments, what do you mean by draw a couple 100ma each ? They draw less than 100 ma each? aproximatelly 100 ma each? or a couple 100 ma (200ma) each ? When you conect the RF modulator in the aerial you are not doing the right thing, indeed you should use a unidirectional splitter to join the signal coming from antena to those coming from RF modulator and then distribute to the house. If you connect the RF directly in the antena as it seems to be . As soon as you connect more modulator you will experience more standing waves ratio .
 

You can connect them in parallel without problem.

nguyennam
 

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