This is the first time I've built something like this, so bear with me. I've soldered on all the resistors, which was easy thanks to all the work put into the parts kit. I moved on to the caps and have had to learn how to read them. I'm still confused though. First, is the 22uf 25v cap in the parts kit for reference C5 (25uf 25v)? Next, ref C2 and C8 call for .1uf 25v, but I only have 1 tantulim(sp) disc type cap with that rating. C9, C13, and C14 call for .1uf 12v, but I have four little caps marked 104 C5K. Is the parts kit a little off or am I supposed to substitute something? Are there any good pictures of a completed board out there? Thanks.

 

I didnt build mine from the Kit So I cant help you out much. Look Under the www.Diy-efi.org for a picture of the complete board. Hope Yours turns Out OK for you. I Have built 2 so far and neither worked. I put the voltage regulator in backwards and I think it ruined somthing on the board. The first Board went up in smoke. The second board shows a constant voltage output of 2.5 volts. Good Luck

 

This may help, or may just confuse you more. This one is not built from the kit either, and uses some extra parts (caps & diodes) and jumpers that aren't on the schematic. However the main parts were ordered from DigiKey to the original BOM, so they should be similar.

Also, I use top and bottom of the board to spread out the parts some, so you have to look around to find everything.

Good luck

drj

http://temp.corvetteforum.net/c4/doc...ngtopsmall.jpg

http://temp.corvetteforum.net/c4/doc...g_botsmall.jpg

 

First the 22 uF 25V will swap with a 25 uF 25V, mind that is has a polarity (electrolytic) and reversing one is rather interesting, it will "POP" like a party favor and smell like burnt sugar.. Now on to your other questions. C2 is a disk style and C8,C9 and C13,C14, are a radial style A 104 I believe is equal to a .1 uF(caps always give me fits). Unfortunitly I havent built the 2 boards I have yet, hell I have all the parts at work even..lol.

Heres my copy of the DigiKey parts list...
Wide Band O2 Sensor Controller Parts List
Rev 1 8/19/01


Quantity Reference Description Digikey P/N Each Total

1 C12 3.3uf,50v,elec,radial P5176-ND 0.21 0.21
3 C1,C6,C16 10uf,25v,elec,radial P5148-ND 0.21 0.63
1 C5 22uf,25v,elec,radial P5149-ND 0.21 0.21
1 C11 47uf,16v,elec,radial P5137-ND 0.21 0.21
2 C3,C4 10uf,25v,tantalum,radial P2049-MD 1.61 3.22
1 C7 0.1uf,10%,100v,poly,radial EF1104-ND 0.42 0.42
1 C10 1uf,10%,100v,poly,radial EF1105-ND 0.99 0.99
1 C2 0.1uf,25v,cer disc,radial P4201-ND 0.22 0.22
4 C8,C9,C13,C14 0.1uf,50v,mono cer,radial P4924-ND 0.43 1.72
1 R4 1 ohm,5%,5w,axial 1.0W-5-ND 0.41 0.41
1 R19 10 ohm,5%,0.5w,axial 10H-ND 0.06 0.06
1 R37 10 ohm,5%,0.25w,axial 10QBK-ND 0.06 0.06
4 R5,R7,R15,R25 1K ohm,5%,0.25w,axial 1.0KQBK-ND 0.06 0.24
1 R3 2.2K ohm,5%,0.25w,axial 2.2KQBK-ND 0.06 0.06
1 R33 3.3K ohm,5%,0.25w,axial 3.3KQBK-ND 0.06 0.06
1 R23 4.7K ohm,5%,0.25w,axial 4.7KQBK-ND 0.06 0.06
1 R14 10K ohm,5%,0.25w,axial 10KQBK-ND 0.06 0.06
2 R17,R40 22K ohm,5%,0.25w,axial 22KQBK-ND 0.06 0.12
2 R26,R27 27K ohm,5%,0.25w,axial 27KQBK-ND 0.06 0.12
1 R34 30K ohm,5%,0.25w,axial 30KQBK-ND 0.06 0.06
3 R2,R8,R24 47K ohm,5%,0.25w,axial 47KQBK-ND 0.06 0.18
1 R18 56K ohm,5%,0.25w,axial 56KQBK-ND 0.06 0.06
1 R39 68K ohm,5%,0.25w,axial 68KQBK-ND 0.06 0.06
3 R1,R16,R38 100K ohm,5%,0.25w,axial 100KQBK-ND 0.06 0.18
1 R28 100 ohm,1%,0.25w,axial 100XBK-ND 0.11 0.11
1 R21 1.37K ohm,1%,0.25w,axial 1.37KXBK-ND 0.11 0.11
1 R9 1.58K ohm,1%,0.25w,axial 1.58KXBK-ND 0.11 0.11
1 R22 2.21K ohm,1%,0.25w,axial 2.21KXBK-ND 0.11 0.11
1 R6 4.99K ohm,1%,0.25w,axial 4.99KXBK-ND 0.11 0.11
5 R11,R12,R13,R31,R35 10K ohm,1%,0.25w,axial 10.0KXBK-ND 0.11 0.55
1 R36 17.4K ohm,1%,0.25w,axial 17.4KXBK-ND 0.11 0.11
2 R29,R30 33.2K ohm,1%,0.25w,axial 33.2KXBK-ND 0.11 0.22
3 R10,R20,R32 100K ohm,1%,0.25w,axial 100KXBK-ND 0.11 0.33
1 D2 Red LED,T1-3/4 160-1124-ND 0.23 0.23
4 D1,D6,D7,D10 1N4148,switch,DO-35 1N4148MSCT-ND 0.05 0.2
1 D3 1.5KE-33A, trans supress,DO-xx 1.5KE33ADICT-ND 0.69 0.69
2 D4,D9 1N4746A,18v,1w,zener,DO-41 1N4746AMSCT-ND 0.25 0.5
1 D8 LM385Z-1.2,1.2v reference,TO-92 LM285Z-1.2-ND 1.86 1.86
2 D11,D5 LM431BIZ,adjustible zener,TO-92 LM431BIZ-ND 1.09 2.18
1 ISO1 PS2501-1,optoisolator,4 pin DIP PS2501-1NEC-ND 0.53 0.53
1 Q3 2N3904,NPN bipolar,GP,TO-92 2N3904-ND 0.29 0.29
3 Q1,Q2,Q4 2N3906,PNP bipolar,GP,TO-92 2N3906-ND 0.29 0.87
1 U5 78L08,8v low power reg,TO-92 NJM78L08A-ND 0.36 0.36
1 U1 LT1086CT,1.5A adj v reg,TO-220 LT1086CT-ND 3.75 3.75
2 U2,U4 LM2902,quad op amp,14 pin DIP LM2902N-ND 0.49 0.98
1 U3 4066,quad bilateral sw,14 DIP TC74HC4066AP-ND 0.68 0.68

Subtotal 24.5
Other misc parts:

1 O2 Sensor, Ekland OS791 170
1 Enclosure box, Radio Shack 5
1 12 position terminal strip, Radio Shack 3
1 WB O2 Sensor Control PC board 10

Total 212.5

Hope this helps. cheers, Bob
------------------
79 Chevy Malibu Cpe
305 TPI/700-R4,3:50 Posi 9 inch,4 wheel disc
Custom Twin Turbocharged,Intercooled
ported upper and lower intake,
35 lb Turbo T-Bird injectors,
214,224 duration .450I .465E lift
749ECM, modified SyTy software
currently under radar
http://turbotpi.homestead.com/SATURN5.html



[This message has been edited by SATURN5 (edited December 10, 2001).]

 

I think I can find all the parts in my rs catalouge now.But the last part on your list is a bit confusing,a wb control pc board.What kind of board is it?Can I get it through rs?Could you give a breakdown of cost on the $212.I can't get an answer on my post,thanks.

 

Probably because most people with the capabilities of building a circuit such as this, simply do not shop at radio shaft for their electrical components. IOW, a complete listing of digikey part numbers, along with each components specs should be sufficient for anyone intent on creating this circuit:

ftp://diy-efi.org/pub/diy_efi/projec...DigikeyBOM.txt

the leters "pc" in this context stand for printed circuit. Radio shaft DOES NOT offer the specific printed circuit board required for a wide band oxygen sensor. Since it is the most important part for one who desires to easily create the circuit, you should probably locate one before proceeding further.

 

I was needing the parts list not the part no. for digikey.I can get most if not all the parts locally.So what I need is the parts list.That way I can go anywhere and get the parts.I'm sure I can find a pc board around here.I'm just not familliar with electronic parts but could do this with help.

 

?

 

Is that 2.5 with the sensor installed and in car?.
If you input voltage is low or the exhuast *cold* they will stay at 2.5.

 

Is/does anyone sell a completed circuit "box" (with sensor, too?)so that we can buy it and add a WB sensor and we are good to go???

 

"does anyone sell a completed circuit "box" (with sensor, too?)so that we can buy it and add a WB sensor and we are good to go???"

Any one????

 

Part of the porject was making it educational.
The kit was designed to be as basic as possible so the average guy could do it. If your going to be into EFI you might as well get used to some simple electronics kits. Subing to the DIY-EFI list gets you plenty of support for getting it up and going.