<div dir="ltr">Yeah, but I am so trying to get something rolling before working on the next upgrade! I too often start my next 2 projects before I finish the 1st, so I have to be extra careful of that... jajaja. Of course you guys are right. As soon as I got the UNO I started studying the family (backwards of course!) drooling over, not just for the horsepower or the memory -- I can juggle that, but the ATmega2560's 54 digital I/O pins, 14 for PWM, plus 16 analog input pins. Of course the ATmega328 can expand I/O with shift registers, using I2C, etc. but why bother when far easier and better can be had for the same cost or less than what I paid for a genuine Arduino UNO.<div><br></div><div>I don't think I can buy from Microcenter and have it easily shipped to Costa Rica -- I've tried before, but they wouldn't ship to my freight forwarder address, only to the billing address of whatever credit card I used for a purchase. When I travel to the US I fill a suitcase with stuff from Microcenter -- I love their prices. So, an online one-stop-shop like RobotShop.com usually works better for me. The SunFounder Mega 2560 Control Board for $17.99 looks like my ticket at RobotShop.com -- although I've been so tempted by prices I see at Banggood.com that I might try an order with them. Anyone here like shopping with them?<div><br></div><div>First thoughts above aside, I do need to get started on Rayo 8.0 and the ATmega2560 plus bigger/better motors for that ASAP! ;-) Soon I'm gonna need some way for our real-world data collection to get stored (uploaded to another server, at least stored on a microSD card for later collection) so all of Rayo Robotkind can benefit from the sensory input of the whole. I'll be able to play around with our allothetic perceptions of the world and we'll be able to think about all sorts of lofty things! ;-)</div><div><br></div><div>--</div><div>Eric</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Aug 4, 2018 at 8:12 AM, Rud Merriam via DPRGlist <span dir="ltr"><<a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p>Was about to suggest the same. Just did a project that started on
a Uno but switchbacked to Due boards for the additional memory.
Not sure if RAM or ROM ran out but both were at the limits for a
UNO. <br>
</p>
<div class="m_7504402165112386758moz-signature">---
<br>
Rud Merriam K5RUD <br>
<a href="http://mysticlakesoftware.com" target="_blank">Mystic Lake Software</a> <br>
<br>
</div>
<div class="m_7504402165112386758moz-cite-prefix">On 08/04/2018 09:03 AM, Doug Paradis
via DPRGlist wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:12pt;line-height:inherit;font-family:Calibri,Helvetica,sans-serif;vertical-align:baseline;color:rgb(0,0,0);text-decoration-style:initial;text-decoration-color:initial">Eric,</div>
<div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:12pt;line-height:inherit;font-family:Calibri,Helvetica,sans-serif;vertical-align:baseline;color:rgb(0,0,0);text-decoration-style:initial;text-decoration-color:initial">
I suggest that you consider having a Arduino Mega sent your
way. It takes<span> </span>more physical<span> </span>space,
but has many more GIO pins. Also, it has 6 external interrupt
pins and I believe 3 PinChange interrupt ports, as well as,
pretty much more of everything else. I was wondering about
your pin assignments for your encoders. It looks like you plan
to use a tachometer type encoder and not<span> </span>quadrature
encoders. The Mega would allow you to use quadrature encoders.
Everything that you have done on the Uno can be transported to
the Mega (you might need to change a pin assignment or two).
It would allow you more freedom to expand. Here is a link to a
reasonably priced Mega, <a href="http://www.microcenter.com/product/486545/arduino-mega-2560" target="_blank">http://www.microcenter.c<wbr>om/product/486545/arduino-mega<wbr>-2560</a>. </div>
<div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:12pt;line-height:inherit;font-family:Calibri,Helvetica,sans-serif;vertical-align:baseline;color:rgb(0,0,0);text-decoration-style:initial;text-decoration-color:initial"><br>
</div>
<div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:12pt;line-height:inherit;font-family:Calibri,Helvetica,sans-serif;vertical-align:baseline;color:rgb(0,0,0);text-decoration-style:initial;text-decoration-color:initial">Regards,</div>
<div style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:12pt;line-height:inherit;font-family:Calibri,Helvetica,sans-serif;vertical-align:baseline;color:rgb(0,0,0);text-decoration-style:initial;text-decoration-color:initial">Doug
P.</div>
<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, Aug 4, 2018 at 8:23 AM, Eric
Yundt via DPRGlist <span dir="ltr"><<a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</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">I stunned and amazed at how easy working with the
Arduino UNO is. [ ... ] Of course, now I still
need more pins </div></blockquote></div></div></blockquote></div></blockquote></div></div></div>