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V8VNCalais
Fully Licenced
238 Posts
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 Posted - 08 Jul 2008 : 5:43:10 PM
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does anyone know much about the electrical side of the VN. I am making an ALDL cable almost done I just cant source a 10k resistor I have a 9k and an 11k resistor but dont know which way to go.
I dont want to blow up the car or the PC
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Edited by - trizo on 08 Jul 2008 7:09:03 PM |
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nodg
National Driver
1667 Posts
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Posted - 08 Jul 2008 : 6:34:45 PM
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| do some research (and ill have a look later) but for now, add what progress your up to becasue this is a how-to section. |
Cheers,
Nodg. |
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V8VNCalais
Fully Licenced
238 Posts
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Posted - 08 Jul 2008 : 7:58:24 PM
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Awesome just to bring every one up to speed this is the diagram that I am working off http://www.techedge.com.au/vehicle/aldl160/aldl_hw.htm
if it looks familiar it is its the one that is in another spot on this site.
I have needed to do some research on the polarity of a few of the componants.
The resistors can go in either way. the transister and the Light Emitting Diode (LED) wont alow the circuit to fuction if these are installed wrong.
I Have used a lenght of Cat 5 Data cable more commonly used in networking in offices.
To identify the Polarity of the LED. the LED is round and has a lip around it extending out 1mmand appears to have been shaved off on one side. the LED has two wire
s coming out of its base one is slightly longer then the other the longer one is the positive lead or (Anode) and is on the side with the lip on it. the negative (or cathode) is the shorter and is on the side without the lip on it. often the short lead is refered to "A" and the longer side "K"
http://en.wikipedia.org/wiki/LED
the come in a few types the one need for the ALDL Cable is PNP transistor identified as BC 557 or a 2N2907.
the polarity for these is a little more complicated. The transistor is a black half round thing about 5mm in height has 3 pins which serve as an emitter (E), a base(E) and a collector.(C) the other type of transistor is a NPN which in similarity to the PNP has the B in the middle and the E and the C on the out sides
this is the complicated part identifying the E and C on the PNP and fitting it into the cicuit diagram accordingly.
http://en.wikipedia.org/wiki/Bipolar_junction_transistor#PNP
the rescources for the transistor didnt offer anything conclosive to which way the transistor should go in the circuit there for it may be in backwards and thes components are heat sensative and there is a possibilit I have fried it while soldering it to othe components.
I have all but finished the project with the exception of the 10k resistor which I await information on substituting for a 9k or an 11k resistor. and if any one knows how to fully identify the leads on a transistor it would be most helpfull |
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V8VNCalais
Fully Licenced
238 Posts
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Posted - 13 Jul 2008 : 01:46:55 AM
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I have been informed that the 9k resistor is in laymens terms near enough. ( I cant be bothered explaining too much right now so heres some light bed side reading
http://articles.techrepublic.com.com/51 ... 34314.html
Im yet to test the cable. Im hoping the length wont have an effect. my laptop doesn't have a serial port tomorrows effort is going to be parking the car on the lawn and running the cable in throught the window to the pentium 3 desk top.. shame I cant take it for a spin and get some proper data on it.
I cant garentee resuts at this stage as once again I fear I may have over heated the transistor |
Edited by - V8VNCalais on 13 Jul 2008 01:53:26 AM |
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trizo
Forum Moderator
3091 Posts
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Posted - 13 Jul 2008 : 10:17:52 AM
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| let us know if the cable frys with that amount of lenghth... although I dont c 2 much going wrong! |
3 can keep a secret if 2 are dead |
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nodg
National Driver
1667 Posts
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Posted - 13 Jul 2008 : 12:03:22 PM
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you can buy a serial-usb converter, i got one from asia for 3 bucks plus postage...
before hand i have a system in the garage (celeron 600 with 15 inch crt monitor) isnt much but for what its used for it is great.... |
Cheers,
Nodg. |
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V8VNCalais
Fully Licenced
238 Posts
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Posted - 13 Jul 2008 : 5:35:16 PM
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| Ok its official, this is the point were I conclude that the transistor is well and truly fried........should have bought spares. next time I by a transistor and one of those thingys that transistors plug into AFTER they are soldered into position..........Its also the point I stop pretending to know what Im doing with it. naturelly I assumed that because the codes are retreivable by bridging two of the terminals and turning the ignition to "ON" I simply turned it to "ON" couldnt see the point in actually starting the car its not like I could go anywhere |
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V8VNCalais
Fully Licenced
238 Posts
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Posted - 13 Jul 2008 : 6:12:42 PM
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Ever had those moments where you get in your car turn the key and get nothing but the engine turnign over? No ignition lights, No CEL, no nothing, blackness.........
only thing I can see at the moment is I touched a wire on something I shouldn't have. I will also be investing in the mateing connector. and another 7.5 fuse. |
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trizo
Forum Moderator
3091 Posts
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Posted - 13 Jul 2008 : 8:10:51 PM
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| lol have a look at your ignition fuse , I have blown it out by linkin up the wrong way to retrive codes! |
3 can keep a secret if 2 are dead |
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V8VNCalais
Fully Licenced
238 Posts
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Posted - 15 Jul 2008 : 7:19:58 PM
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| yep I already checked pulled a 5amp fuse from the dash board illumination until I could get to the shop to replace it. bought the 7.5amp fuse pluged it in as soon as I got home then after I come back out and nothing. everything worked fine when I tested it then when I came back later it was all blown ot agian and I hadnt even tried to plug the ALDL in again |
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