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Ok thank you. So enought a simply 220V - 5v Dc switching power converter and do i connect the "+" to the Vdd and the "-" to the Vss?
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Do I need two independent power supply for this schematic??? The Vdd comes from arduino and the other supply 5v to Vss???
This way does the only? smiley-confuse

The second supply is AC or DC?
Now the powered from an USB connector.
« Last Edit: April 20, 2012, 11:40:34 am by myDuino » Logged

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If you read the posts I told you how to connect the extra supply. The + to ground and the - to Vss.
It should be 5V DC.
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Sorry Mike but I don't realy understand. Can you complete my schematic with your suggestion?
I would be really helpful.
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Last chance to understand




* PowerSupply.jpg (102.35 KB, 856x417 - viewed 34 times.)
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Hello! I draw my second schematic, but now I can see you draw your own. Thank you.
I have only some question!
Do I need two independetn power supply or can I connect it to the supply what goes to the arduino?
Can't do any crashes on my arduino if I connect 5v to the ground?
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can I connect it to the supply what goes to the arduino
No think about it. If you do you willbe putting a short circuit on your supply. You need a seprate power supply, like I have been telling you all along.
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Last chance to understand




Now my circuit looks like you draw it. Are you sure I don't make any crash with my other part's to connect to arduino if I connect +5v to the arduino gnd pin???
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You obviously do not believe me so look at this link
http://www.kpsec.freeuk.com/powersup.htm
Under the Dual Supplies section.
It shows two supplies in this case 9V with the +ve of one connected to the -ve of the other. This point is zero volts and corresponds to your arduino's ground.
The free -ve output should be connected to the Vss pin, the free +ve end (if you have a 5v supply) should be connected to the 5V on your arduino.
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I did it exactly what you suggested. Now when I connect the arduino to my pc and pluged the second supply into the ac line:
The sound quality is so bad, always stay on same level, I can't switch on/off with 0 and 255 like before, and my IC is fire hot.

What happens???
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I don't think you connected the grounds, Dave.
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What happens?
What happens now?

You get hold of a copy of Horowitz and Hill, and you read it.
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What happens?
What happens now?

You get hold of a copy of Horowitz and Hill, and you read it.

Thank you for this fantastic suggestion! I have a great suggestion to you too...
« Last Edit: May 02, 2012, 07:29:15 am by myDuino » Logged

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Mike?
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Wire it up correctly. If it gets hot you have not.

Can you post a picture of your setup?
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Now I wired back to the prew state but at this time the IC is hot and doesnt work...  smiley-cry

CAn I make any harm in my arduino? How can i test it?

And I check again and again but my schematic looks like what you drew.
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