Re: Home Grown ActionTec Development Daughterboard

Patrick,

> Here are the parts and prices for what I would use.
> 
> $1.67  Intersil ICL3221CA -- 3.3V RS232 level converter
> $3.12  TI TL16C550CIPT -- UART
> $0.093 Fairchild Semi 74VC04M -- Hex inverter
> $2.60  M-tron MHR13TAJ-1.8432 -- 1.8432Mhz crystal
> 
> $7.48 grand total

...plus $30 shipping and handling! :-)

Good find!  The Intersil ICL3232CB (@ $1.67 from Arrow) is a direct 
replacement for Digikey's $5.63 LTC1386CS, a $4 savings.  What's up with 
that!?

However, once you add in all the connectors, resistors, header pins, 
switches, etc., we're still closer to $18 in components...still not a bad 
deal.  In 100's, the price is likely to drop to under $15 per board 
including making the PCBs.

I'm guessing that PCB assembly NRE + per-board assembly costs will add 
another ~$10 per board, quantity 100.  Grand total, ~$25 per board 
assembled plus misc. connectors.  This ignores someone's labor costs for 
ordering parts and making up a "parts kit" for the assembly house.

Does anyone see any holes in my reasoning?  So who's ready to tkae this 
on! :-)  I'll buy some!

But we're getting ahead of ourselves, let's see how Patrick makes out this 
weekend.  Keep us posted...

(Patrick: Remember that you can "borrow" the crystal from your existing 
daughterboard!)

Best regards,

Bruce

-- 
  Bruce D. Lightner
  Lightner Engineering
  La Jolla, California
  Voice: +1-858-551-4011
  FAX: +1-858-551-0777
  Email: lightner-2huV/[email protected]
  URL: http://www.lightner.net/lightner/bruce/

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