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Recap of the SAI circuit

 
Old 09-25-2011, 02:56 PM
  #106  
slapshot
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Wow! Thank you for proposing this Lewis. I would like to sign up for this too - with a '97, so we will see. No worries about guarantees, and be glad to remit any premium required for an assembled one. Two left hands in the electrical dept.

Last edited by slapshot; 09-25-2011 at 02:58 PM. Reason: Grammatically challenged too.
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Old 10-09-2011, 08:33 PM
  #107  
ltc
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Hello,
My apologies for not posting in this thread for a while; my septic system at home recently failed and I've been dealing with ...

In any event, today I completed the schematic capture and PCB layout.

Prior to ordering, I just wanted to update everyone on pricing vs quantity ordered.

For the bare PCB, no components (2 sided, 1.75" x 1.75"), the price per board is:

$28.26 each for qty 10
$11.94 each for qty 25
$6.50 each for qty 50
$3.78 each for qty 100

(this is typical for PCB fabrication. they run 1-2 panels at a fixed cost and you pay this price, no matter how many circuits you get on a panel.) The PCB is being fabricated by Advanced Circuits. I've used them many times in the past, they are a US on shore PCB fab house.

As far as enclosures, it is optional. I have designed the PCB outline to fix this inexpensive IP54 plastic housing (about $1.50 each):
http://www.mouser.com/ProductDetail/...mIxZS2NA%3d%3d
Again, it is up to you whether or not you want to use this small enclosure or not.

As far as terminations, the PCB will accept either soldered wires or it can built with wire to board terminals (simple screwdriver to connect/disconnect):http://search.digikey.com/us/en/prod...036-ND/1826899
(these are about $0.25 each and the design accomodates 5...one for 12V/GND and then one for each O2 sensor)....again, optional if you wish soldered wires.

As far as components, there are the 4 transistors, one diode, 2 caps and a single resistor array (makes it a bit easier to solder/assemble for those wishing a kit building experience).
I would estimate these components together to cost about $2.00 or so.

Again, the selling price will be EXACTLY the parts cost + shipping and handling (I think USPS Priority mail is about $5.95)

Please let me know how many people are still interested in these (assembled or kits) and if you prefer the terminal blocks or soldered wires and or an enclosure.

The PCB fabrication time is one week, plus shipping time, followed by assembly (I should be able to build a couple a night, even with my quickly diminishing eyesight!).

Each kit (or assembled board) will ship with a hardcopy of the schematic and the PCB layout to aid in assembly and integration.

Regards,
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Old 10-09-2011, 08:39 PM
  #108  
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Lewis,

I'm still in for 2 assembled boards complete in enclosures. Let me know when you are ready to accept payments.

Thanks again for doing this!
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Old 10-09-2011, 08:44 PM
  #109  
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Somewhere along the way in this thread I jumped in for one... I'm still in for one assembled, soldered unit. And please, you're doing all the work, add in some labor, and let us know the easiest payment method for you (assuming PayPal, but whatever works best).
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Old 10-09-2011, 08:54 PM
  #110  
Matt Lane
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Just a thought - that pricing curve on the PCB's is very steep (good).

The difference in total $ outlay for 10 boards or 100 boards is less than a hundred dollars. Might as well put in an order for Q100!

There are a lot of 993's here that are going to need this...

Best,

Matt
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Old 10-09-2011, 09:28 PM
  #111  
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Lewis,

I am in for 2 please. Great item to have in case I ever need one.
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Old 10-09-2011, 09:43 PM
  #112  
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I took the liberty of going through the thread and making a list. Looks like we're at 49 interested, with some folks wanting more than one.

Thanks for taking the time to do this Lewis.

vincer77
Rick Lee
Aircooled Dave
michaelh993
tonypai
fullbooker
NP993
flying low
ilko
600RR
Shahrams
bw993
tbil
Teddy2
Ash
993BillW
Jim W
Dan V
efong
AW21
NC TRACKRAT
cabrio993
Paul M
tropheus
C4SJOHN
MDamen
TheBen
JPS
air993
alpinadvl
rsa964
cdmdriver
Jeff96-993
Kaefer
SimonM_98
CarreraX
skypig
Don't lift
2ndof2
Richard W
Amfab
M Fig
e3photo
911Dave
kraftsman
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slapshot
bprasmsn.com
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Old 10-09-2011, 10:03 PM
  #113  
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Confirming my desire for one assembled with enclosure and terminal blocks please.Thanks!
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Old 10-09-2011, 10:44 PM
  #114  
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I'm still in. Prefer the assembled version as well. Thanks again Lewis!
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Old 10-09-2011, 10:57 PM
  #115  
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I am still in for two ( 2 ) assembled version of the units. If you want or need the payment and shipping information before starting the process please let me know. Lewis, Thanks again. John
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Old 10-09-2011, 11:13 PM
  #116  
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I'm in for 4 assembled units. If we need more to make a key number of unit, let me know as I can pitch in for more units.
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Old 10-09-2011, 11:57 PM
  #117  
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Lewis I insist on paying you for your R&D and labor. This is America.
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Old 10-10-2011, 12:01 AM
  #118  
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Please add me to the list for 2 assembled units w/ enclosures and term. blocks. Thank you!

This will be a great tool to have.

Last edited by Blue TTop; 10-10-2011 at 08:29 PM.
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Old 10-10-2011, 12:06 AM
  #119  
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Thanks Lewis...I'm new to the mix and would like one kit w/enclosure... looks like you have plenty of assemblies to do. I could probably do some after I hone my skills on my kit. I've PM'd you with my contact info.

-Bob
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Old 10-10-2011, 12:39 AM
  #120  
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Default Thanks Lewis

Please put my name on one fully assembled kit with the enclosure.
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