<br><br><div class="gmail_quote">On Mon, Nov 26, 2012 at 1:44 AM, Henrik Nordström <span dir="ltr"><<a href="mailto:henrik@henriknordstrom.net" target="_blank">henrik@henriknordstrom.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
sön 2012-11-25 klockan 20:42 +0000 skrev luke.leighton:<br>
<div class="im">> we have a bit of a conundrum over component pricing. $7 or<br>
> thereabouts is due to the use of EOMA-68 (casework etc). but even<br>
> subtracting $7 from $113 we're still a whopping $26 (23%) off of<br>
> equivalent devices with the same functionality.<br>
<br>
</div>Any component brakdown outlining differences?<br>
<div class="im"><br>
> the target's $80. can anyone help source parts on this list that will<br>
> help us to reach the target?<br>
<br>
</div>$26+$7 is quite a bit to scrape off.<br>
<div class="im"><br>
> Capactitive 5T $11.00 NJY 10000 CTM with NO CONTROLLER<br>
<br>
</div>Hmm.. what is used as controller?<br>
<br></blockquote><div><br>a 100-pin STM32F. 15 scan lines where you do PWM, this charges the capacitors; 9 "sense" lines, connected to ADCs, read them in, shove the output over to the main processor, let it work out the answers.<br>
<br>as this would be raw data being received and decoded on a 1ghz+ processor, theoretically it would be possible to do... i dunno.... 50-point multi-touch or something ridiculous.<br><br>l.<br><br></div></div>