Menu
▾
▴
Re: [Gumstix-users] does gpio's tolerate 5v?
|
From: Anders W. <di...@ds...> - 2007-05-29 05:16:05
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
Thanks Dave and Marc!<br>
<br>
<br>
<br>
Marc Nicholas wrote:
<blockquote
cite="mid...@ma..."
type="cite">Anders,<br>
<br>
The Sparkfun "shifters" that I directed you to will do that. They'll
actually do pretty much any voltage combo you like -- they're sourced
from each drive side with a clever transistor array setup.
<br>
<br>
So, you can do:<br>
<br>
- 12vdc serial to 5vdc<br>
- 5vdc to to 3.3vdc<br>
- 3.3vdc to 1.8vdc<br>
<br>
Pretty much any esoteric combination in between.<br>
<br>
If you know what you're doing, just the transistor array.
<br>
<br>
-marc<br>
<br>
<div><span class="gmail_quote">On 5/28/07, <b
class="gmail_sendername">Anders Wallsson</b> <<a
href="mailto:di...@ds...">di...@ds...</a>> wrote:</span>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000">Hi Dave<br>
<blockquote
cite="http://mid...@ma..."
type="cite"><span class="q">
<blockquote type="cite">
<pre>Can you recommend any voltage level converters?
</pre>
</blockquote>
<pre>It depends on what you're trying to do.
</pre>
</span></blockquote>
the gum needs to talk to another device that talks 0-5v TTL. <br>
<br>
Ive a couple of 3v TTL <-> RS232 and 5v TTL <-> RS232 chips
i can connect but that is gonna be a lot of components for little bang.
Seems this might be common enough problem that people have created a
dedicated chip for it.<br>
<br>
cheers<br>
Anders<br>
</div>
<br>
-------------------------------------------------------------------------<br>
This SF.net email is sponsored by DB2 Express<br>
Download DB2 Express C - the FREE version of DB2 express and take<br>
control of your XML. No limits. Just data. Click to get it now.
<br>
<a onclick="return top.js.OpenExtLink(window,event,this)"
href="http://sourceforge.net/powerbar/db2/" target="_blank">http://sourceforge.net/powerbar/db2/</a><br>
_______________________________________________<br>
gumstix-users mailing list
<br>
<a onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:gum...@li...">gum...@li...</a><br>
<a onclick="return top.js.OpenExtLink(window,event,this)"
href="https://lists.sourceforge.net/lists/listinfo/gumstix-users"
target="_blank">https://lists.sourceforge.net/lists/listinfo/gumstix-users</a><br>
<br>
</blockquote>
</div>
<br>
<pre wrap="">
<hr size="4" width="90%">
-------------------------------------------------------------------------
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
<a class="moz-txt-link-freetext" href="http://sourceforge.net/powerbar/db2/">http://sourceforge.net/powerbar/db2/</a></pre>
<pre wrap="">
<hr size="4" width="90%">
_______________________________________________
gumstix-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:gum...@li...">gum...@li...</a>
<a class="moz-txt-link-freetext" href="https://lists.sourceforge.net/lists/listinfo/gumstix-users">https://lists.sourceforge.net/lists/listinfo/gumstix-users</a>
</pre>
</blockquote>
</body>
</html>
|