Re: [AVR-Chat] UPDATE - AtTiny Communication Problem
2010-01-29 by Kenny M.
I think I might pickup some lighter wire too. Maybe some telephone wire I think it's 26 gauge solid usually.
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----- Original Message -----
From: "Ivan Vernot" <ivernot@optushome.com.au>
To: AVR-Chat@yahoogroups.com
Sent: Thursday, January 28, 2010 11:24:57 PM GMT -05:00 US/Canada Eastern
Subject: RE: [AVR-Chat] UPDATE - AtTiny Communication Problem
Hi Kenny,
I had a quick look at your setup and frankly you'd save yourself and us quite a bit of time if you made the whole setup a bit more 'solid'. As others have said flying wires everywhere - and no bypass caps - and uncertain continuity - and uncertain connections - are all too variable for anyone to be able to help (unless they are sitting next to you)
If I were you I would -
1. Make all lead lengths as short as possible
2. Check the continuity of each line (miso,miso,sck,reset, etc) between the AVR ISP and ACTUAL pin of the micro (the proto boards are notorious for intermittent connections).
3. Check you have a nice clean 5V PSU (a regulated lab power supply is a great investment)
4. make sure you add the 100nF bypass cap as close as possible to the micro PCB.
5. Double (triple) check you connections between the ISP and the micro (MISO and MISO are easily swapped)
6. Try to get a know working board (sparkfun has some pretty cheap prebuilt kits)
I'd have for you to be discouraged for this hobby just because of a bad start but you are really having a bad time at this. Unless you have plenty of spare time I's start with something 'known working' then get back to these 'bargain' ATTinys when you have more confidence in you setup and your abilities.
Good Luck
Ivan
> -----Original Message-----
> From: AVR-Chat@yahoogroups.com [mailto: AVR-Chat@yahoogroups.com ] On
> Behalf Of Kenny M.
> Sent: Friday, 29 January 2010 2:33 PM
> To: AVR-Chat@yahoogroups.com
> Subject: Re: [AVR-Chat] UPDATE - AtTiny Communication Problem
>
> Yes you're right, I had to reverse the connections when using the clip.
> I just didn't bother just for taking that pic.
>
> -Kenny
> ----- Original Message -----
> From: "erikc" < firewevr@airmail.net >
> To: AVR-Chat@yahoogroups.com
> Sent: Thursday, January 28, 2010 10:29:30 PM GMT -05:00 US/Canada
> Eastern
> Subject: Re: [AVR-Chat] UPDATE - AtTiny Communication Problem
>
>
>
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>
> 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:
> > 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
> >
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> Yahoo! Groups Links
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