<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><br><br>It's also connected to the ground pad under the chip. Nice, huh?</div><div><br>On Sep 14, 2016, at 17:08, Kevin Williams <<a href="mailto:kevinkkdi@gmail.com">kevinkkdi@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Would it be possible to drill out the via between the board layers and then add a dab of solder back afterwards?<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Sep 14, 2016 at 1:38 PM, Alex Davis via TriEmbed <span dir="ltr"><<a href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Anyone done anything with their prime-day Dash buttons? I found this<br>
interesting page:<br>
<a href="http://key-basher.blogspot.com/2016/09/amazon-dash-button-version-2.html" rel="noreferrer" target="_blank">http://key-basher.blogspot.<wbr>com/2016/09/amazon-dash-<wbr>button-version-2.html</a><br>
<br>
On V2, ERASE is tied low to a via in front of the pin AND to the ground<br>
plane underneath the chip! That means you can't easily erase it. I<br>
haven't done a teardown on mine, but does anyone know if the Atmel MCU<br>
is QFP or QFN? If it's QFP, ERASE pin could be lifted. Otherwise, you<br>
have to unsolder the chip, rework the board, then solder it back on.<br>
Ugh. I'd rather not waste time on such a cheap item.<br>
<span class="HOEnZb"><font color="#888888"><br>
Alex<br>
--<br>
"The theater of noise is proof of our potential."<br>
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