Re: [uCsimm] Power supply for uCsimm

From: David Smead (smead@amplepower.com)
Date: Sun May 07 2000 - 15:45:32 EDT


Erik,

that will work. There is a linear regulator onboard that drops the input
voltage to 3.3V.

BTW, it would have been better to get a 5V supply to use for other logic
that you may want to add.

Sincerely,

David Smead
http://www.amplepower.com.
http://www.ampletech.com.

On 7 May 2000 erik@calderasystems.com wrote:

> Okay, I've looked as much as I can look through non-searchable mail list
> archives, I checked the documentation, I've searched the web, on and on. I'm
> having a bear of a time finding an answer to this (rather simple) question.
> You'll laugh when you read it...
>
> I have my uCsimm and uCgardener all set up and ready to plug in. I see in the
> manual that this puppy runs at 3.3v. The gardener board lists 4-6v (negative
> pin, I believe) near the socket for the power supply's plug. Thinking that 4-6v
> was a definitive range for power supplies, I purchased one that runs at 4.5v up
> to 700mA.
>
> Before I plug this thing in, I want to know beyond the shadow of a doubt that
> pumping 4.5v into this is okay. This may seem obvious to seasoned embedded
> hackers, but some of us are just now starting. When I see one set of docs say
> this runs at 3.3v and the board says 4-6v, and there is no further explanation
> offered in documentation, the main web site, FAQs, etc., I get worried (why
> isn't that clearly documented? I can't be the only person who's ever wondered
> about this).
>
> Please, if anyone can enlighten me on this, I'd appreciate it. I'm very
> comfortable with Linux (been using it for years), and software doesn't bug me,
> but I"m new to this miniature hardware stuff.
>
>
> E.
>
> This message resent by the ucsimm@uclinux.com list server http://www.uClinux.com/
>

This message resent by the ucsimm@uclinux.com list server http://www.uClinux.com/



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