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Recap of the SAI circuit

 
Old 10-27-2011, 11:57 AM
  #226  
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Hi Tom...added.
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Old 10-27-2011, 06:55 PM
  #227  
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Update:
PCB's have been received from Advanced Circuits.
(unfortunately UPS delivered them to the wrong house, so it wasn't until my neighbor came over this morning did I finally have them).

Now that the list seems to be settling for plastic enclosures, I will add them up this weekend and place the order this weekend.

If it takes me 10-15 minutes to solder all the components onto one PCB, that's 4-5/hour, so about 20-25 hours of assembly for 100 units (hopefully I can do it a bit quicker)....that means if i can get a few hours each night, I should have them ready to go in about a week or so.

I will keep supplying updates as I go along.

As soon as they start rolling off the "assembly line", I will start asking for PMs with shipping addresses. Then my bride will take over the logistics department!
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Old 10-27-2011, 09:40 PM
  #228  
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Lewis-
Dumb question: Although it's probably a remote possibility, can you think of any way to do a simple QA test on the assembled board to ensure that there are no faulty components?
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Old 10-27-2011, 09:44 PM
  #229  
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As I mentioned earlier in this thread, I would simply apply 12v to the input (blue/grey) and verify each FET is conducting...use a DMM on Ohms or equivalent.

The circuit is fairly basic.
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Old 10-28-2011, 10:23 AM
  #230  
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As of this morning, I checked my spreadsheet against Ash's master list from post # 212.
We have 90 assembled units, 9 "Heathkits" (kind of nice surprise) and 63 enclosures.

I will probably assemble the first unit tonight and run some quick checks on the bench to verify it performs per the schematic
(this will be simply done by applying 12V, then measuring that the output FETs have turned "ON" .... then removing 12V and measuring that the output FETs are "OFF". This can be done with a 12V battery (actually you could use a 9V battery as well) and a hand held meter).

Once everything looks OK, then "mass production" will begin.

I am going to contact the local post office to ask them to order 100 of the USPS Priority Mail boxes. It seems like the quickest/easiest way to send the units out to everyone at a flat fixed rate.
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Old 10-28-2011, 11:54 AM
  #231  
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Originally Posted by DryFly View Post
Thanks again.

(edit: Thanks Bill)
No problem. I think I was at 4k posts before I figured that out so you're well ahead of me.
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Old 10-28-2011, 07:30 PM
  #232  
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Unit #1 has been assembled and electrically tested.

It's Alive !




Always concerned that something happens with library symbols, net list transfer, fab files, etc, but everything went perfectly.

So, 90 assembled units, 44 solder joints per unit ... Let the fun begin
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Old 10-28-2011, 07:41 PM
  #233  
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Originally Posted by ltc View Post
Unit #1 has been assembled and electrically tested.

Always concerned that something happens with library symbols, net list transfer, fab files, etc, but everything went perfectly.

So, 90 assembled units, 44 solder joints per unit ... Let the fun begin
Wow! Only 3,960 solder joints left.........
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Old 10-28-2011, 07:41 PM
  #234  
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for what it's worth, I'm trying an experiment with a 4 pole relay that I had lying around that has a 12V coil - it's not as light weight as solid state, but it's another approach to do the same thing. It will be interesting to see if this works for most people
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Old 10-29-2011, 09:48 PM
  #235  
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hi,
I'd like to be added to the waiting list for 1 assembled with enclosure.
thanks much!
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Old 10-30-2011, 01:46 AM
  #236  
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I'd like to hear others report that this method of shorting the O2 sensor outputs to a single ground work to clear the SAI fault - if it does, I wonder why the relay approach doesn't seem to work - the CEL is on still after 4 or 5 drive cycles.
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Old 10-30-2011, 03:17 AM
  #237  
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Ack! Just got back from a week of business travel without real internet connectivity and noticed that there's been discussion of enclosures.

If it's not too late to get my two with enclosures, I'd love to get them too. Sorry for being late to the party!
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Old 10-30-2011, 04:40 AM
  #238  
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Added TxnBluDvl's request for enclosures - not sure if Lewis has already ordered them prior to your request

Also added LizSter's request to be put on the 2nd round list.

See Post #212 for list updates.
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Old 10-31-2011, 12:30 AM
  #239  
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think i figured out why the relay wasn't doing the trick one contact pair must be not closing, I can see normal voltages on one O2 sensor - maybe that's next week's troubleshooting.
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Old 11-02-2011, 11:27 AM
  #240  
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Wow...this is more of what I get for having been deployed...is it too late?
Would love two assembled w/enclosures! Thanks.

~Dave
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