Injector Control Options

[AbeFM]

Heh. I'd be *happy* to get a free cake, but I suppose I could do the test instead.

Er, on the resistors, I guess since you spec'd 1% you actually care about the values? I think I have most of those already, but I might ask later which ones I can fudge by a few percent to hit values I already have. I'll look it all over tonight, put together an order.

[Fred]

I didn't download the BOM, but some of them are high power, remember that :-)

[AbeFM]

I didn't include the common resistors. But this is a quick BOM.

Um, is that PER injector? Seems so.

It's in the V14 schematic? Doesn't look it.
Anyway, give me something to put under "quantity" and I'll be ordering it tomorrow.

[AbeFM]

• Index Quantity Part Number Description Customer Reference Backorder Quantity Unit Price
  USD Extended Price
  USD
• 1 4 785-1140-5-ND MOSFET N/P-CH COMPL 30V 8-PDIP 0 0.87000 $3.48
• 2 4 497-2795-5-ND MOSFET N-CH 70V 10A TO-220 0 2.09000 $8.36
• 3 3 296-1391-5-ND IC QUAD OP AMP 14-DIP 0 0.42000 $1.26
• 4 10 MBR160RLGOSCT-ND DIODE SCHOTTKY 60V 1A AXIAL 0 0.37100 $3.71
• 5 8 P13137-ND CAP 100UF 63V ELECT EB RADIAL 0 0.36000 $2.88
• 6 4 BC2079-ND CAP FILM MKP .33UF 63VDC 2% 0 0.82000 $3.28
• 7 4 BC2143-ND CAP FILM MKP .02UF 250VDC 2% 0 0.58000 $2.32
• 8 4 WHB470FECT-ND RES 470 OHM 1W 1% WW AXIAL 0 0.80000 $3.20
• 9 10 CMF1.00KHFCT-ND RES 1.00K OHM 1% 50PPM 1/2W 0 0.11000 $1.10
• 10 4 MPR3-0.01J-ND RES .01 OHM 3W 5% RADIAL 0 0.79000 $3.16
• 11 5 39.2KXBK-ND RES 39.2K OHM 1/4W 1% METAL FILM 0 0.09800 $0.49
• Subtotal $33.24

Had to fudge the cap (6) a bit to find something in stock, 2% vs 1%. Anyway, looks ok?

[Delta]

I didn't include the common resistors. But this is a quick BOM.

Um, is that PER injector? Seems so.

It's in the V14 schematic? Doesn't look it.
Anyway, give me something to put under "quantity" and I'll be ordering it tomorrow.

Yeah its per injector, list looks good - the schematic is back quite a few pages, if you want a new copy I can send it to you??

[AbeFM]

Wouldn't hurt. The one I saw had some inductors in it, which is what had me worried.

BTW, I was planning on just getting power, etc, from my MS V3 board, and using Jean's signal interceptor board unless I can find something better. When it all shows up I'll figure it out.

Ok, so my list is good for ~4 circuits...

______________
Ordered.

[AbeFM]

Finally, after convincing the purchasing people to release my parts since they are personal after all..... I got them! Woo-hoo. Now time to use them!

So, again, I'd like to see a copy of the circuit you want me to build! I have some ~1.5 ohm injectors, protoboard, a MS and a breakout board. Seems straightforward. But the schematic I saw had an inductor on it, so now I want to be sure I'm building the right thing.

Someone please post one ASAP and I'll get onto the testing bit. Also, where would be sensible test points for an o-scope?
-Abe.

[jbelanger]

The inductor on the schematic is the injector. And one of the voltage sources is the ECU injector connection (the one that's not 12V or 5V). Unless I read the schematic wrong.

Jean

[AbeFM]

Okey-doakey then, so it's 98% built, and I was going to run it - anything anyone wants to see? Voltages at a certain point, temps of certain chips? I'll get a pic and post it soon. I brought home a 4 channel oscope, and totally forgot my IR thermometer, but still have a thermocouple I can poke around with.

[AbeFM]

Well, the only thing that leaps out at me is reading voltage drop accross a 10, 20, or 50 milliohm resistor inline with the injector. But, guess I'll have to worry about it tomorrow...