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Re: [AVR-Chat] UPDATE - AtTiny Communication Problem

2010-01-28 by Kenny M.

Here are some pics, hopefully you can make sense of them ... lol 

http://img163.imageshack.us/slideshow/webplayer.php?id=dsc00362oy.jpg

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----- Original Message ----- 
From: "John Samperi" <samperi@ampertronics.com.au> 
To: AVR-Chat@yahoogroups.com 
Sent: Thursday, January 28, 2010 4:06:34 PM GMT -05:00 US/Canada Eastern 
Subject: RE: [AVR-Chat] UPDATE - AtTiny Communication Problem 






At 08:05 PM 28/01/2010, you wrote: 
>Well it's got to be your board then. 
>Either some pins wired up incorrectly between the programming header & 
>processor, or solder bridges between the programming lines. 

...and we still don't know if he has ANY bypass caps on the power supply pins. 

Regards 

John Samperi 

******************************************************** 
Ampertronics Pty. Ltd. 
11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA 
Tel. (02) 9674-6495 Fax (02) 9674-8745 
Website http://www.ampertronics.com.au 
*Electronic Design * Custom Products * Contract Assembly 
******************************************************** 





      

[Non-text portions of this message have been removed]

Re: [AVR-Chat] UPDATE - AtTiny Communication Problem

2010-01-28 by John Samperi

At 10:08 AM 29/01/2010, you wrote:
>Here are some pics, hopefully you can make sense of them ... lol

It seems to be wired up correctly (image 4) however:

Have you physically measured the wires all the way back to the chip?

Have you measured the supply voltage when all is connected?

With such long wires you need to put a 100nF ceramic cap across
the supply pins on the chip itself (pins 4 and 8) or the whole thing
is likely to oscillate crazily.

Regards

John Samperi

********************************************************
Ampertronics Pty. Ltd.
11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA
Tel. (02) 9674-6495       Fax (02) 9674-8745
Website  http://www.ampertronics.com.au
*Electronic Design * Custom Products * Contract Assembly
********************************************************

Re: [AVR-Chat] UPDATE - AtTiny Communication Problem

2010-01-29 by erikc

In one of those pictures you have a part in an inverted "dip-clip".
Is that part the AVR?  If so, check all the connections.

erikc

Kenny M. wrote:

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> Here are some pics, hopefully you can make sense of them ... lol 
> 
> http://img163.imageshack.us/slideshow/webplayer.php?id=dsc00362oy.jpg 
> 
> 
> ----- Original Message ----- 
> From: "John Samperi" <samperi@ampertronics.com.au> 
> To: AVR-Chat@yahoogroups.com 
> Sent: Thursday, January 28, 2010 4:06:34 PM GMT -05:00 US/Canada Eastern 
> Subject: RE: [AVR-Chat] UPDATE - AtTiny Communication Problem 
> 
> 
> 
> 
> 
> 
> At 08:05 PM 28/01/2010, you wrote: 
>> Well it's got to be your board then. 
>> Either some pins wired up incorrectly between the programming header & 
>> processor, or solder bridges between the programming lines. 
> 
> ...and we still don't know if he has ANY bypass caps on the power supply pins. 
> 
> Regards 
> 
> John Samperi 
>