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Topic: arduino + sensor shield + servo + atx power supply (Read 1 time) previous topic - next topic

antoine_b

hi arduino community,

I need advices about my wiring.
I have a duemilanove + sensor shield v4 + 4 digitals servos.

I'm wandering what i need for my power supply, because the internal amperage will not be sufficient.

I have an old atx power supply, that i can convert...

And I need informations about my general wiring (setup) for this kind of configuration.

Thank you very much for helping a new arduino afficionado.

merci,

Antoine


PaulS

#1
Oct 22, 2010, 02:26 am Last Edit: Oct 22, 2010, 02:27 am by PaulS Reason: 1
Some links to the hardware that you have would be a good idea.

Quote
And I need informations about my general wiring (setup) for this kind of configuration.

Don't use the same color wire for everything.

If you have some specific questions, the answers might (OK, probably will  ;)) be better.

James C4S

Quote
I have an old atx power supply, that i can convert...


Most ATX power supplies have minimum load specifications in order to have stable voltages.  The supply I have sitting next to me needs .5a @ 3.3v, .3A @ 5v, and 2A @ 12V.  That's about 20W just to provide stable power.
Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com

cybertim

I managed to do this recently with 12 servo's

http://www.youtube.com/watch?v=HnyU_iUFqC8

But i would strongly suggest not to use the sensor shield, the 5v paths on the board are way to thin for the ampere's your going to surge.

I made a shield myself with only the GRND connected to the arduino and thick threads to some female connectors that lead to the atx power supply.
For my first test i did use a sensor shield, and it smoked/burned the little paths on the board..

For the ATX supply i would suggest following this guide:
http://www.wikihow.com/Convert-a-Computer-ATX-Power-Supply-to-a-Lab-Power-Supply


antoine_b

thank you cybertim,

I will follow your advices.
What do you think about the pololu micro servo controller :

http://www.pololu.com/catalog/product/207

is this will be a better solution ? and why?

thank you again,

antoine

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