[ML-General] PhreakNIC badge materials group buy!

[Brian Oborn]

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.

Here's a reference on the NEC IR protocol for an example protocol:
http://www.sbprojects.com/knowledge/ir/nec.php
And here's a link to the datasheet for the receiver preamp:
http://www.vishay.com/docs/82748/vsop383.pdf

Just throwing out the design constraints before people get too excited
about IR applications.

Bobby Tables

On Mon, Oct 2, 2017 at 11:12 AM, Hunter Fuller <hfuller at pixilic.com> wrote:

> Gang,
>
> 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.)
>
> If you want one, it's going to cost $30. The default package will be this
> one:
> https://www.adafruit.com/product/3517
>
> So, you'll get the board, battery box, batteries, and belt clip.
>
> 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 https://www.adafruit.com/product/1578 as it'll fit
> behind the board while you're wearing the badge).
>
> 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.
>
> Cheers!
>
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