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

[Donald Delmar Davis]

Not that this isnt facinating but ...

What's the status on the group order part of this thread?


On Jul 6, 2009, at 2:10 PM, Jesse Mejia wrote:

> Yeah - nice one! That was seriously an unusually hard piece of info  
> to track down!
>
> On Mon, 6 Jul 2009 13:54:59 -0700
> "Greg Grunest" <greg at grunest.com> wrote:
>> Where did you find that?  I looked on the web for another half hour  
>> figuring
>> it would be easy to find.  Oh well.  I bow down to your web searching
>> skills!  Maybe you can find my old college girlfriend and that guy  
>> who owes
>> me money. -----Original Message-----
>> From: dorkbotpdx-blabber-bounces at dorkbot.org
>> [mailto:dorkbotpdx-blabber-bounces at dorkbot.org] On Behalf Of Laen
>> Sent: Monday, July 06, 2009 1:50 PM
>> To: dorkbotpdx-blabber at dorkbot.org
>> Subject: [dorkbotpdx-blabber] Re: Synth chip (SN76477) Group Order
>> According to the data sheet, the pin spacing is .07" (versus the
>> normal .1" pin spacing), and the Wikipedia page says the chip came in
>> a .6" wide DIP or a .4" wide DIP.  It looks like we're getting the
>> second one, which would be a .4" DIP with .07" pin spacing.
>> Pretty weird!
>> -Laen
>> On Jul 6, 12:45 pm, Jesse Mejia <jme... at tffenterprises.com> wrote:
>>> .04" maybe? What's standard?
>>>
>>> On Sun, 5 Jul 2009 22:44:06 -0700
>>>   "Greg Grunest" <g... at grunest.com> wrote:
>>>
>>>
>>>
>>> > Thanks for the clarification.  In looking at the board for the SN
>>> >voice
>>> > project (in the link you provided), you can clearly see in the
>>> >picture the
>>> > odd spacing of the SN76477 chip compared to the other ICs  around
>>> >the 76477.
>>> > It even looks like a copy of the BG Micro breakout board.  It must
>>> >be some
>>> > sort of .07" or .05" spacing on the chip pins.
>>>
>>> >From: dorkbotpdx-blabber-boun... at dorkbot.org
>>> > [mailto:dorkbotpdx-blabber-boun... at dorkbot.org] On Behalf Of Jesse
>>> >Mejia
>>> > Sent: Saturday, July 04, 2009 8:46 AM
>>> > To: A discussion list for dorkbot-pdx (portland, or)
>>> > Subject: Re: [dorkbotpdx-blabber] Synth chip (SN76477) Group Order
>>>
>>> > 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
>>> >
>> <http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ED22 
>> ...
>>> >> &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.pdfshow 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-boun... at dorkbot.org
>>> > [mailto:dorkbotpdx-blabber-boun... 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
>>> ><dorkbot... 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
>>> > <http://www.bgmicro.com/index.asp? 
>>> PageAction=VIEWPROD&ProdID=12925>
>>> > &ProdID=12925
>>>
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