<div dir="ltr">I haven't used it yet, but I purchased one of these for that exact purpose: <br><br><a href="https://www.adafruit.com/product/1875">https://www.adafruit.com/product/1875</a><br><br>It's a bi-directional shifter, which you've already thought of, so may or may not help :) <br><div><br></div><div>73</div><div>Stephen</div><div>K1LNX</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Sep 21, 2017 at 3:20 PM, Bryan Fields <span dir="ltr"><<a href="mailto:Bryan@bryanfields.net" target="_blank">Bryan@bryanfields.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Is there a best practices for interfacing 5v TTL logic with the 3.3v logic on<br>
the GPIO pins?  I was thinking a bi-directional shifter would be good, but<br>
there are so many different ways to do this.<br>
<br>
Is there a best current practice for this?<br>
<span class="HOEnZb"><font color="#888888">--<br>
Bryan Fields<br>
<br>
<a href="tel:727-409-1194" value="+17274091194">727-409-1194</a> - Voice<br>
<a href="http://bryanfields.net" rel="noreferrer" target="_blank">http://bryanfields.net</a><br>
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