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ok heres a couple of pics of my best lead so far in finding a good solution for how to do the pcb and box. it would be a double serial adaptor box, which one side plugs into ur serial port on laptop, and the other side plugs into a cable from the consult port.

this has the added advantage of being that u can keep the consult plug connected 24/7, and just disconnect the adaptor box from the cable whenever u arent using it. ive been meaning to try figure out whether we have a switch or something to turn it off, but this seems to be a much more elegant solution.

the box would have female connector on laptop end (as laptop serial port is male) and a male on the consult cable end.

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ive uploaded a quick list of parts and likely costs, this should hopefully represent the maximum cost it could be, but most likely will be able to bring them down a bit by buying in bulk or from somewhere else (i think i know someone who might be able to get me stuff a bit cheaper). the max232 chip especially should only be about half the cost jaycar sell it for if i get it elsewhere

http://users.bigpond.net.au/newkleer/diyco.../components.xls

as you can see at this point the total is > $60, but id hope the final one would be down around the $50 mark including postage (if i buy stuff in bulk)

ive got some of those adaptors in the above pic, and if theres no problems fitting pcb with components in it, then ill go ahead with finalising the pcb. im aiming for the first run of components to be about 25, can always sell on other forums if theres left overs, so not too worried about minimum numbers or anything

ill probably make a new thread in group buys or something after pcb is made and ive built one and do a writeup/instructions of it. im not quite sure yet though if it would be better to only sell kit to a few and make sure they dont have any problems building it that i hadnt thought of (or missing components or whatever)

Edited by NewKleer

recieved 25 of the adaptor boxes (black) this week (ended up costing a bit more than a thought as i forgot to factor in exchange rate and shipping). at this point im estimating around 45$ for final thing, ill probably aim to make it an even $50 including postage (which i can buy in lots of 10 or something)

external dimensions are roughly 70x42x20 (maybe 80 long when u factor in serial connectors on the ends), so roughly same as previous one but slimmer. hopefully this weekend i can have a shot at a final pcb layout for it

heres some more pics. this is the final draft. board fits into box with connectors on end like in pic i posted above.

also managed to to fit a power led on board, with a 3mm led and with a bit of bending (i imagine), it should be able to poke thru the little screw hole in serial connector, so that u can see the power is on before u connect the adaptor to the serial port of ur laptop, thus no drilling required

close to definite that cost will be $50 + postage for final kit if all goes well

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Hi,

Wow this look awesome. I dont know alot about electronics, but i can solder (managed to build a couple of digital tachos previously). Definatley put me down for a kit in the next available run!!! :P;):P

decided to rearrange it a bit and add in the send/receive leds out the other end of the connector. pics are a bit bigger this time. also put a lot more info on the pcb itself so it alone would be enough (if readable :() to put together

as far as im concerned this will be final layout, excepting mistakes (and a check to make sure components will fit ok). sending this off to get checked by pcb manufacture place, id estimate a few weeks and itll be ready (if no mistakes or any problems arise)

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theres enough software out at the moment which means making any more isnt really worth the effort. for free software, calumsult and scantech nissan are a pretty good combo, add datascan if you dont mind paying for it

at the start of this year i had a go at making a combined comms/consult access (for both pocketpc and desktop), and got ecu serial number, and reading sensors out of the way, but didnt have enough time to do the rom reading. main problem however is pocketpc graphical stuff is pretty limited and i had problems with it

ill be looking to continue with that perhaps after this semester of uni, or i might have a go at an lcd display, havent worked out which yet. the lcd display would be more promising as it would be more of a permanent thing, whereas laptop software isnt something u use permanently, so its usefulness is limited aside from specific information gathering/diagnosis.

my thesis is coming up at uni next year, so i was looking into possibilities to do something with consult for that. dont want to get too far ahead now, for the time being i want to get this kit happening before anything else

Edited by NewKleer

pcb's are in process of being manufactured, and ive ordered nearly all needed parts

attached is a rough placement of components on a pcb, will closely resemble how the arrangement will be on final one (most are half a position off in x and/or y, but pretty close)

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Edited by NewKleer
  • 3 weeks later...

i should have all parts and pcb's sometime this week!

edit: they came today! unfortunately wont have much time over next few days, but before end of week hope to make one and test it and see it all works well, but so far so good

edit2: they mixed up the serial connectors so need to wait for proper ones to come

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Edited by NewKleer

heres my construction guide minus any photos. if anyone wants to have a read of it and let me know if, assuming they were making the board (and have the diagram pic as above - note "hood" on pic = C9 capacitor) whether they cant understand anything or would need some parts better written.

i made one last night as a test (pic2 above), havent had time to actually try it yet though. missing two resistors near the leds on the right, but apart from that its finished

construction.txtFetching info...

i put one together the other night. found out that in my last minute rush to add the yellow led to the pcb when designing it, that i got it to hook up to ground instead of power (but being my first shot at custom pcb, surprised i didnt make any other mistakes). theres a workaround to fix this (cut a track and then solder two pins together with a bit of wire), but in my opinion its probably not important enough to worry about this LED - more important are the power one and the send from ecu (to pc) led.

either way ill include needed parts and update the guide to explain how to fix this if for some reason yellow led is important. apart from that, im quite pleased about how its progressed so far. ill contact people individually about those who will be the guinea cops, but at a minimum ill need them to read the construction guide in advance and let me know if they think its clear enough to work off and so on.

last thing im worried about is the voltage regulator and transistor being quite a tricky soldering job - the distance between the legs is quite small and would be easy to solder two legs together, so not sure what i can do to help with that. i spose if ur not confident in getting that done properly, i could probably solder them to the boards before sending off (just makes it hard to solder the shorter components though, ie they fall out of the holes easier if they arent flat against whatever youre soldering on).

will be busy until next week so i dont imagine doing anything till then (and missing parts wont be here till around then), but ill contact those who've expressed interested about whether they want to be one of the first few to give it a shot and give me some feedback on construction

at this stage i wont be looking to make pre-made ones (whole point of this was cause i didnt have time to make them all myself), but there may be others out there down the track that might put them together for a fee

Edited by NewKleer

few more pics now i worked out how to focus the camera better!

edit: added two more pics, of final board + cable. couple resistors missing from the board near led's, but apart from that its complete

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Edited by NewKleer

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