[dorkbotpdx-blabber] Synth chip (SN76477) Group Order

[Jesse Mejia]

The SN76477 was produced in 2 form factors - standard dip, and a  
narrower version. (0.4" row sapcing I believe)

The BG micro lady told me the chips they have in stock are the  
narrower version - she didn't specify the exact spacing but after  
doing some internet hunting it looks like they will likely be 0.4".  
She recommended the breakout board to solve this.

FYI today I found this socket at digikey:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ED22284-ND

Which I believe will work. Maybe if enough ppl order them w/ the next  
normal dorkbot group order they'll be cheap!

I need to verify the pin spacing - so far all I know for sure is that  
the chips BG micro carries fit the little breakout board they also  
carry.

For what it's worth..  if anyone is interested in the SN voice  
project.. I *think* these pcbs are still available http://mypeoplepc.com/members/scottnoanh/smselectronicssnvoicepcboard/
These things accept both versions of the chip.


-Jesse

On Jul 3, 2009, at 3:31 PM, Greg Grunest wrote:

> I was wondering if someone could tell me what the breakout board was  
> for.  The chip specs posted on the BGmicro sitehttp://docs.bgmicro.com/pdf/ics76477.pdf 
>  show the IC as having standard 10th inch spacing (100mils x 600mils).
>
> Has someone seen the breakout board?  Is there something I’m  
> missing?  Do I really need it?
>
> Should I have attended Don’s class and then I could make whatever  
> boards I wanted and therefore control the universe? (insert maniacal  
> laughter here)
> Probably.
>
>
> From: dorkbotpdx-blabber-bounces at dorkbot.org [mailto:dorkbotpdx-blabber-bounces at dorkbot.org 
> ] On Behalf Of dan p
> Sent: Thursday, July 02, 2009 10:28 PM
> To: A discussion list for dorkbot-pdx (portland, or)
> Subject: Re: [dorkbotpdx-blabber] Synth chip (SN76477) Group Order
>
> ah, thanks. Now that I have my mad board etching skills (thanx Don)  
> I'll try to make my own...
> On Thu, Jul 2, 2009 at 7:41 PM, Thomas Lockney  
> <dorkbotpdx at dorkbot.org> wrote:
> dan p wrote:
> I think I missed the part about break out boards?
> >From Jesse's earlier email:
>
> Sweet! Yeah I'll go ahead and put together a group order for these  
> little guys. I just called and checked stock - they have "plenty".  
> Apparently the package is a little odd so there is also a $3  
> breakout board they offer for it. Let me know if you want it as well.
>
> http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=12925
>
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