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Electronics => Electronics => Topic started by: TrickyNekro on January 07, 2008, 07:53:11 AM

Title: Can any one check a schematic for me???
Post by: TrickyNekro on January 07, 2008, 07:53:11 AM

As the tittle suggests...
I have a ATMEGA schematic... If anyone can check if it is correct for me I would be gratefull!!!

If there is any will I'll upload the pic!!!

Thanks in advance,
Lefteris, Greece!!!

Title: Re: Can any one check a schematic for me???
Post by: Crooksie on January 07, 2008, 01:42:41 PM

I will take a look if you like

Title: Re: Can any one check a schematic for me???
Post by: Kohanbash on January 07, 2008, 02:56:13 PM

Hi
Its probably a good idea to just upload it and let people look at, someone will usually respond.

Title: Re: Can any one check a schematic for me???
Post by: TrickyNekro on January 07, 2008, 03:54:55 PM

Here is the schematic... zipped...
It's a bmp sorry...

Thanks for the repplies,
Lefteris, Greece

Title: Re: Can any one check a schematic for me???
Post by: JonHylands on January 07, 2008, 04:03:35 PM

What are you planning on driving with the L298? You've got the inputs hooked to C2 - C5, which are not hardware PWM pins...

- Jon

Title: Re: Can any one check a schematic for me???
Post by: TrickyNekro on January 08, 2008, 07:46:37 AM

They are pins with no special use and I'm just planning to use then as I/O ports... but I can get PWM with every port I want (almost...)
with the compiller I use...
The L298 is just for simple motor drive... my problem is with the ISP... can I get power from ISP???
I'm using STK500 do I need configure anything when using the 10pin ISP...
That's my big problem... That's why I did post this here... It involves anything programming electronics settings... etc
Thanks for your repply anyway...
Top regards, Lefteris,
Greece


PS I'm using BASCOM to program the AVRs

Title: Re: Can any one check a schematic for me???
Post by: Crooksie on January 09, 2008, 11:23:45 AM

From a picture I have (I think its from a spark fun tutorial) I found a ISP header which is wired differently from the one you have, take a look at the attacked image.

You can't get power from ISP I don't think, the board needs its own power supply.

Title: Re: Can any one check a schematic for me???
Post by: Admin on January 13, 2008, 01:12:48 PM

The board will supply power to the ISP.

For the crystal capacitors, are you use 33pF is correct for your exact crystal? I usually see 22pF used . . .

For your AVR ISP connector, I don't think you need that 220 resistor and LED. The programmer I use changes the LED color whenever I program.

(I didn't look up the datasheets to verify anything)