[TriEmbed] Frying Raspberries - TriEmbed Digest, Vol 22, Issue 25

Jon Wolfe jonjwolfe at anibit.com
Mon Mar 30 16:53:16 CDT 2015


One of the things I love about AVRs is that they are electronically much tougher than any ARM I've run across.  The only AVR I've ever fried was when I connected its power to wrong side of an lm317 and sent 9 volts into it. Even then, no magic smoke; the code on the chip still functioned, it just lost the ability to be flashed with new code.


I've never fried an ARM chip, but that's more dumb luck than anything else. It seems that whenever I mess up some wiring, it's a cheap logic or buffer chip that takes one for the team.

<div>-------- Original message --------</div><div>From: Terry King <terry at terryking.us> </div><div>Date:03/30/2015  3:42 PM  (GMT-05:00) </div><div>To: triembed at triembed.org </div><div>Cc: drbearee at gmail.com,maryalice at yourduino.com </div><div>Subject: Re: [TriEmbed] Frying Raspberries  - TriEmbed Digest, Vol 22,
 	Issue 25 </div><div>
</div>I think Arduinos are much more resistant to frying.  This may be because their older technology
has larger features and/or their I/O pins which Atmel assumed would be used for physical computing
(as compared to the Pi's processor-centric SOC) have bigger reverse diodes.

So why  not just use Arduino for the physical I/O and link it to a Pi for the Computer/ Operating
System / Network / Human Interface World part, and accept the fact that they are so different? And
there are so many good software library / device choices out there.

DISCLAIMER: About to mention stuff from my own shop...!! Watch out!

AT $15 for a nice Arduino Derivative that already has 20 I/O pins, 20 ground pins, and 20 Vcc
pins, plus nice 4-pin I2C and Serial connectors, and a 5V 2A switching supply built in, why not
solve a bunch of things that are far from the Linux world.  I have sold about 5000 of these 
(really just selling Atmel 328's and pins) and I think I've got 5 back that were fried "for
unknown reasons". I do know of several that were fried for Known, Oops type reasons. And I have
had a bad batch of the earlier versions that had fake USB chips that the manufacturer later
bricked with a drive update. My board manufacturer replaced them immediately. So we went to the
UNO type USB and that has been trouble-free.
See:http://arduino-info.wikispaces.com/YourDuino-RoboRED

I'm looking for a good small HDMI display that costs less than the Raspberry Pi to run it. Anyone
seen good possibilities?  A Pi with that,  a cheap Mouse and and Arduino I/O interface would make
many really nice intelligent, networked devices.

I've been smelling the solder flux smoke for 64 years now (starting with the 1-tube receiver for
my Radio Merit Badge) and it's the only kind I like.

Regards, Terry King
...In the Woods in Vermont USA
terry at terryking.us

-The One who Dies with the most Parts LOSES. What do you need??


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