arduino + sensor shield + servo + atx power supply

Forum 2005-2010 (read only) Hardware Interfacing
1

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

2

Some links to the hardware that you have would be a good idea.

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.

3

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.

4

I managed to do this recently with 12 servo's

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:

5

thank you cybertim,

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

is this will be a better solution ? and why?

thank you again,

antoine