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grnsky

Re: Power supply, positive or negative connection

3 posts in this topic

How is it that anything within the range of 7-10V is okay? What are the considerations for going higher or lower within that range? If you go to far with current, like say 1.5A, would that be bad in combination with 10v or 7v? If that's a dumb question, don't worry; I know an electrician I can ask, I just thought you might now about it in this context. Thanks**

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well the range is ok because the 7805 is a 5v regulator.

if you're going > 1A, you'll want to use the 2A version of the 7805 (forget the part #).

i'm not sure if a higher input voltage will give you more current.  in a circuit that doesn't have a regulator, of course higher voltage = higher current.  but i think that because of the regulator, current draw will be based on 5v (maybe someone else can confirm if i'm correct?) because it's all post-regulator.

i can say for sure though that you should check your overall current draw once the midibox is completed and make sure your dc adapter's rating is higher.  in previous incarnations of my seq, i had > 1A draw and had to switch to a 2A regulator and a dc adapter that allows for 1.5A.

ultra

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The behaviour of voltage regulators has been discussed at length before, have a search....

Edit: a quote from the chat, just so you know:

<stryd_one> i'm all for helping dudes who have had a solid search and obviously he is looking around because he's resurrecting 4 year old threads

<stryd_one> he's just giving up too soon...

Keep going, the answers are there :)

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