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Author Topic: Arduino Pro Mini
GigiG
Newbie
Posts: 9
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Post Arduino Pro Mini
on: December 16, 2014, 18:51
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Hi all, I'm new here and I have only a simple question at the moment. Is it ok to use an Arduino Pro Mini instead of an Arduino Uno? I want to build a DIY Chronos system as small as possible so I was thinking about a Pro Mini togheter with a DRV8825 driver. Thanks in advance and many congratulations to Chris for these great project. Regards.
Gigi
PS: I'm not completely new to timelapse and dollies (see timelapse pages on my web site https://sites.google.com/site/gigimysite/home/motorized-dolly) because I already built one lead screw type based on miniEngine (v1) but It seems that Chronos system is even better regarding characteristics, options and development workflow ...

Chris@Chro-
nos
Administrator
Posts: 137
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Post Re: Arduino Pro Mini
on: December 16, 2014, 19:25
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Hi Gigi,

The Arduino Pro Mini only has 16 KB (of which 2 KB used by bootloader), and the Chronotimer code uses about 30k. (it is really packed in there)

another alternative would be this. http://www.adafruit.com/products/72
however, you have to program the chip on an arduino, or get an FTDI cable.
same with this http://moderndevice.com/product/rbbb-kit/

another alternative that MIGHT worked is this http://moderndevice.com/product/arduino-micro/

If you are feeling real ambitious you could always design your own circuit board with free software such as Designspark, which is what i use to design my own circuit boards. It is fairly easy to use, and you can get very inexpensive small production batches from DFROBOT.

As for the driver, your results may vary. I had tried these in the past without much luck, several of them popped when in use, and i dont think i could hit as high of motor speed with them. it was years ago that i tried though, you may have better luck than I did. I checked out your build, and i don't really see any real benefit for your application of using it over the a4988 driver chips :)

GigiG
Newbie
Posts: 9
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Post Re: Arduino Pro Mini
on: December 16, 2014, 22:26
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Hi Chris and thanks for your quick reply. I'll investigate for the alternatives you suggested but, as for the Arduino Pro Mini, I was referring to boards like this one:

http://www.ebay.com/itm/271636797698?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

that I bought recently and seems to work just fine. They are chinese Arduino clones based on ATmega328 chips like the original Arduino Uno so I suppose they have 30KB of memory. Do you think that they are ok? Anyway, I can try to upload your firmware and see what happen ...

dannyhu
Newbie
Posts: 1
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Post Re: Arduino Pro Mini
on: January 1, 2015, 03:21
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Hello Chris _ I had the very same question. is it possible to you the arduino pro mini from this ebay link? http://www.ebay.com/itm/271636797698?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

GigiG _ where you able to get this up and running?

GigiG
Newbie
Posts: 9
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Post Re: Arduino Pro Mini
on: January 1, 2015, 11:39
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Hi dannyhu, I only tried to upload the firmware to an Arduino Mini (ATmega328) clone and this operation was successful using the Arduino IDE. Currently I don't have a Chronos system ready to check the Mini. I'm waiting for the LED display from Sparkfun. As soon as the system is completed and tested I'll tell you. Ciao.

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