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Have a question about Arduino? Ask me!

sciguy14 over 15 years ago

This thread has been closed to new questions.

However, we welcome you to Post Your Questionabout Arduino in the element14 Community Arduino group. You'll find many fellow members and experts who have just the answer you're looking to find!

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Jeremy Blum

Jeremy is an Electrical and Computer Engineering Student at Cornell University. He has been building microcontroller projects since high school, from a prototype prosthetic hand with a novel control scheme, to a nerf gun that fires at the intruders and uploads their picture to the web.

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tronixstuff over 15 years ago in reply to e14 Contributor

No offence, but how long is a piece of string?
Search for 'Arduino' in this site - http://letsmakerobots.com/ to get some ideas about what sort of things you want your robot to accomplish, etc.
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e14 Contributor over 15 years ago

congratulations for your work, I think I found the perfect place for my progect.
the two years started my progect ROV but with some change advice in my life, I had to stop. something in me made me believe I was able to finish, thanks to you I woke up and started again, I already have some of the material in my office and I'm buying a module for Arduino. I have some doubts whether this board allows a serial rs485 I would like to help if possible
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e14 Contributor over 15 years ago in reply to e14 Contributor

hi,
My atmega don't have a bootloader, how can I upload a program in my atmega 328p-pu?
thanks in advance
bye
Ugnius
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sciguy14 over 15 years ago in reply to bobcroft

Yes, but you'll need an ICSP programmer to load the program on and bypass the arduino bootloader.
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sciguy14 over 15 years ago in reply to e14 Contributor

You need to burn the arduino bootloader onto the atmega chip before you can program it with the arduino IDE.
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sciguy14 over 15 years ago in reply to e14 Contributor

I'm not certain. It could be a bug in the arduino IDE...
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sciguy14 over 15 years ago in reply to e14 Contributor

IF you have a new chip, you need a way to burn the bootloader onto it before you can program it with the arduino language. See here: http://www.arduino.cc/en/Main/Bootloader
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sciguy14 over 15 years ago in reply to e14 Contributor
You'll need to use inline assembly to make a dealy that short. With the CPU running at 16MHz, the shortest cycle you can make is 6.25ns. use the following code to do that.
__asm__("nop\n\t");
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sciguy14 over 15 years ago in reply to e14 Contributor

You'll need to at least solder a header connection into those holes, you can then use a connector if you want.
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sciguy14 over 15 years ago in reply to e14 Contributor

Yes, you can do RS4285 communication, but you'll need a transceiver chip like this these: http://www.newark.com/jsp/search/browse.jsp?N=200718+810017209&No=0&getResults=true&appliedparametrics=true&locale=en_US&divisionLocale=en_US&catalogId=&prevNValues=200718&filtersHidden=false&appliedHidden=false&originalQueryURL=%2Fjsp%2Fsearch%2Fbrowse.jsp%3FN%3D200718%26No%3D0%26getResults%3Dtrue%26appliedparametrics%3Dtrue%26locale%3Den_US%26divisionLocale%3Den_US%26catalogId%3D%26prevNValues%3D200718
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