<div dir="ltr">Note that I looked into the IR receiver chip on the Playground Circuit Express and it's designed for IR remote control protocols (like for your TV) and as such has a very low bitrate. Using established IR protocols it would be around 500bits/s and if you hacked up your own protocol you might be able to get to 1000bits/s. Unless you changed the hardware (hook the IR receiver directly to the ARM's ADC?) you're not going to get much better than that.<div><br></div><div>Here's a reference on the NEC IR protocol for an example protocol: <a href="http://www.sbprojects.com/knowledge/ir/nec.php">http://www.sbprojects.com/knowledge/ir/nec.php</a></div><div>And here's a link to the datasheet for the receiver preamp: <a href="http://www.vishay.com/docs/82748/vsop383.pdf">http://www.vishay.com/docs/82748/vsop383.pdf</a></div><div><br></div><div>Just throwing out the design constraints before people get too excited about IR applications.</div><div><br></div><div>Bobby Tables</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Oct 2, 2017 at 11:12 AM, Hunter Fuller <span dir="ltr"><<a href="mailto:hfuller@pixilic.com" target="_blank">hfuller@pixilic.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Gang,<br><br>shapr and I think it would be neat to make our own electronic badges for PhreakNIC this year. We've settled on a recently-released platform from Adafruit, the Circuit Playground Express. This platform has IR communication, so we'd like to focus on in-person interaction between badges. (His suggestion was to show matching interests based on LED color, but the possibilities are endless.)<br><br>If you want one, it's going to cost $30. The default package will be this one:<br><a href="https://www.adafruit.com/product/3517" target="_blank">https://www.adafruit.com/<wbr>product/3517</a> <br><br>So, you'll get the board, battery box, batteries, and belt clip.<br><br>If you prefer to use a Li-ion or Li-ion polymer battery, and you already know how to charge one of those, please email me separately. I can buy you the board for $25, and I'll also buy you a battery if you need one (I recommend this battery <a href="https://www.adafruit.com/product/1578" target="_blank">https://www.adafruit.com/<wbr>product/1578</a> as it'll fit behind the board while you're wearing the badge).<br><br>The order will be placed on Wednesday - that is TWO DAYS from now. PayPal or Square Cash me $30 at this email address and you'll get in on the fun! You don't have to hack the badge if you don't want to - you can always just let me or shapr download some fun code onto it for you. We promise there will be lots of blinking, and some optional beeping.<div><br></div><div>Cheers!</div></div>
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