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16  General Category / General Discussion / Re: Question about Arduino Serial Board from Mouser on: February 18, 2011, 11:40:55 pm
The whole list of parts doesn't cost that much from Mouser.  I was going to order some things anyway and there was this handy board that I could solder a chip and a few bits and bobs to.  I wanted a board that was suitable for an Atmel chip that required a separate ground plane for the ADC's VCC.  Moving up to an ATMega simplifies, at least as far as I can tell, wiring it up and programming my project.  Or not.  The chip costs about the same as the ATTiny26 and all the other parts are exactly the same. 

It requires the six pin programming cable and I'll be waiting for that to arrive from Sparkfun.

17  General Category / General Discussion / Re: Arduino for industrial automation on: February 16, 2011, 05:45:24 pm
I don't know all that much about industrial automatons but if a safety lockout is mediated by a processor it is wrong in the first place.  If there is not a standard that says so there should be.  I have spent a significant amount of time pulling parts out of a 300 ton press and even if it had skipped its timing, that electromechanical lockout on the door would have kept it from engaging.  You'd better believe that all of my eyes were on that ram.  Yes, I have the usual two eyes, but when you're watching something that close...

The big problem would be the potential for damaging machinery and ruining production runs.  Even then, as much as possible the machinery is built to make it difficult to damage that way.  Nothing that can cause severe problems in a plastic injection mold is totally under control of its CPU.  There will be a fusible link or a limit switch or something.  There should be no safety measure that can be overridden by software.  When any machine is taken down for repairs it is locked out so that it is physically impossible to start it without unlocking it.  This includes physically blocking an item like a shear so that it cannot move. 
18  General Category / General Discussion / Re: Question about Arduino Serial Board from Mouser on: February 15, 2011, 11:41:20 pm
Quote
Smart Projects in Italy.
This is the official Arduino Manufacturer, right?

It is.  I found it on the main site here.  That didn't occur to me until after I had already called Mouser and they didn't know.  They name Arduino as the supplier and Arduino names Smart Projects as their manufacturer.

http://arduino.cc/en/Main/Buy

19  General Category / General Discussion / Re: Question about Arduino Serial Board from Mouser on: February 15, 2011, 06:46:13 pm
I managed to trace the board to the manufacturer which is Smart Projects in Italy.  http://www.smartprj.com/catalog/index.php?main_page=product_info&cPath=1&products_id=6  As James said, it is just the board.  It also looks like it takes the power jack with the solder tails on it, the kind that go to wires.  The original in the parts list has small pins.  I'm going to try that one anyway.

Thank you, James.  I will order some boards and parts tonight.  It looks like a continually stocked item that is still in production. 
20  General Category / General Discussion / Re: Cal Poly Engineering Project Assistance Needed on: February 13, 2011, 09:53:05 pm
I would use a separate supply for the servos.  Make sure it has a good heatsink.  Running one amp through a 7805 chip without a heatsink will burn it up.  You also want at least that much isolation to keep current transients from interfering with the Arduino.  I would put a choke on both power supply lines.  Radio Shack has some small toroids in a bag for a decent price.  In general you want the power supply to your microcontroller board to be very, very clean.  The easiest way to do that is to use a separate regulator for trouble-making devices.

You should also put at least a thousand microfarads of capacitance before the regulator for the servos.  This will help a lot to quiet the 12 volt line.
21  General Category / General Discussion / Re: Question about Arduino Serial Board from Mouser on: February 13, 2011, 08:11:56 pm
If it already has the complete parts set I will use the kit as is.  Otherwise it will be the atmega48 for around $2.50.  Digikey sells the power jack for 88 cents each (Mouser doesn't seem to have one) and will mail it first class for $2.41.  I'm waiting for an email from customer service at Mouser and hopefully they will tell me on Monday if it's just the board.

Sparkfun has a really good price on a serial cable and the cable for the programmer, including a 6 pin plug. 

Whichever way it goes, it's a really good price for a board with just enough of what I need.  I don't even need the components for the serial interface.
22  General Category / General Discussion / Re: Question about Arduino Serial Board from Mouser on: February 12, 2011, 05:09:13 am
I compared pinouts myself and the only difference seems to be that the newer chips have more functions on top of the Atmega8 functions.  The trouble is that Mouser is out of Atmega8 chips and will be until July.  If I have to buy the parts separately I need an MCU.  If they come with I don't have to buy any MCUs.

The serial boards are great for my needs.  I really just need a circuit board already made up with the lines brought out like that.  It even has a ground plane for the analog lines.  I don't want to have to send another order and I don't want a lot of extra parts.

I built an ISP from the old Ponyprog schematics on Lancos.  It works.  I have an Attiny26 happily flashing LEDs now.  My application wants a couple of analog inputs and the Attiny gets crowded if I can't have the same port switching and watching three analog inputs.  I think it will also want that ground plane.
23  General Category / General Discussion / Question about Arduino Serial Board from Mouser on: February 12, 2011, 01:20:35 am
Does anyone know if the A000006 Arduino board from Mouser is just the board or does it include parts?

Also, can the Atmega88 be used on this board?  It looks like the pinout matches.
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