LS1GTO.com Forums banner

1 - 20 of 138 Posts

·
Registered User
Joined
·
89 Posts
Discussion Starter #1 (Edited)
First post...here goes nothing.

If you're thinking about the shift light/logo/etc cluster mod but $65 for the required cable seems less than appealing, read on. Total cost including shipping for me was $12.04.

Supplies:

FTDI FT232RL USB to TTL Serial cable - ebay is where I bought mine
http://www.ebay.com/itm/New-USB-to-TTL-Serial-Cable-Adapter-FTDI-Chipset-FT232-USB-Cable-Computer-Cable-/261101529602?pt=LH_DefaultDomain_0&hash=item3ccadd2a02&rmvSB=true


16 Pin Male OBD2 connector - also ebay
http://www.ebay.com/sch/i.html?_from=R40&_sacat=0&LH_BIN=1&_nkw=16+Pin+Male+OBD2+connector&_sop=15


Soldering iron and solder
Wire strippers
Screwdriver

The wires we're going to be dealing with are RXD (receive data), TXD (transmit data), and GND (ground). In my case these were the white, green, and black wires, respectively. I'm not sure if these color codes are an official standard, so check the pinout of the cable you go with.

1. Strip a small amount off the white, green, and black wire. You can cut off the remaining wires or leave them and tape them back - it doesn't really matter.


2. Slide the boot and retainer on now or you won't be able to get them on later.


3. The back of the connector should be labeled 1-8 on the bottom and 9-16 on the top. We'll be using 9 and 5.


4. Safety glasses on, tin the wires by melting a small amount of solder onto them, then trim so there's about 2-3mm of exposed wire left.


5. Solder the white and green wires to pin 9 and and black wire to pin 5. (For what it's worth there's a trace connecting pad 4 and 5 so either would work but I'd just stick with 5).


6. Set the connector and retainer in the housing. The rest is self explanatory.


7. Finished product.


8. Hook to your PC and Windows should download the correct drivers. I then used the VZClusterMod software (which is awesome by the way) to make my changes to the cluster. Here's a heartbeat screenshot to show everything works.


You don't need to be a soldering expert to do this - the chip is far enough down the wire that you won't burn it out, and it'd be hard to mess up anything on the connector end.

So there you have it...5 minutes of work and $50 saved. Big thanks to the guys who did the ground breaking on the cluster programming.


EDIT: I can guarantee that the FTDI FT232 chip/cable I used will function properly. If you want to try another cable that is being sold as USB to TTL Serial, do so at your own risk because we're finding out that some of the chips, especially the PL2303, are being mis-marketed by sellers as TTL when they are really RS-232. A wrong chip has the potential to fry your cluster.
 

·
Registered
Joined
·
1,067 Posts
I wish my first post was this good.
 

·
Registered
Joined
·
984 Posts
Just ordered mine off amazon. Came out to just about $9 with amazon prime.
 

·
Registered
Joined
·
100 Posts
Broke open an extra usb cable that was laying around. A standard usb has 4 pins: red(+5 V), white (data -), green (data +), and black (ground). Would this work vs getting a 6 pin usb? Where are the extra 2 pins going to, since the standard usb only has four contact points.
 

·
Registered
Joined
·
984 Posts
Broke open an extra usb cable that was laying around. A standard usb has 4 pins: red(+5 V), white (data -), green (data +), and black (ground). Would this work vs getting a 6 pin usb? Where are the extra 2 pins going to, since the standard usb only has four contact points.
Pretty sure that doesn't work. There is a chip built in to the one listed by the OP that converts the signal.
 

·
Registered
Joined
·
984 Posts
Can you post up where you found it? Im finding shit adding to $13 plus. but the cable portion is an add-on and i need to be over $25 before it can ship. which isnt hard. Ill be able to find something I want, but just curious what you got exactly.
$4.27
[ame]http://www.amazon.com/gp/product/B00B0L1J80/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1[/ame]

$4.98
[ame]http://www.amazon.com/gp/product/B008AGDTA4/ref=oh_details_o00_s00_i03?ie=UTF8&psc=1[/ame]

Hopefully I got the right stuff! And, yes, I had to add a few items that I have been meaning to buy to break the $25 "add-on" threshold.
 

·
ROW ROW ROW...
Joined
·
8,943 Posts

·
No Miata No Miata No Miata :(
Joined
·
6,752 Posts

·
Registered User
Joined
·
89 Posts
Discussion Starter #19
I need to watch this just because. It's been on my Netflix for a while now.


Broke open an extra usb cable that was laying around. A standard usb has 4 pins: red(+5 V), white (data -), green (data +), and black (ground). Would this work vs getting a 6 pin usb? Where are the extra 2 pins going to, since the standard usb only has four contact points.

Pretty sure that doesn't work. There is a chip built in to the one listed by the OP that converts the signal.
Correct, it won't work. The FT232 chip is embedded at the USB connector - that's where the magic happens to convert the USB signal to TTL serial which is the key. It's sort of like how you can't just plug your computer straight into your DSL or cable line to get your internet connection...you need a modem to translate the signal. The FT232 chip is the modem in this case. To answer your question though for anyone else who is curious, all six wires go to the chip, but the other two wires are Request to Send and Clear to Send used for flow control.

$4.27
http://www.amazon.com/gp/product/B00B0L1J80/

$4.98
http://www.amazon.com/gp/product/B008AGDTA4/

Hopefully I got the right stuff! And, yes, I had to add a few items that I have been meaning to buy to break the $25 "add-on" threshold.
It has a different chip but I'm 99% sure it will work. Actually, I'm curious now because I believe that's the same chip in the USB to Serial cable that a lot of us have to interface with the Predator. I'm going to try something and let you guys know what I find.
 

·
1 of 40,757
Joined
·
6,247 Posts
I went with Hong Kong via Ebay ala 2-4 weeks for delivery @ $11.
Finally that elusive shift light will be mine.

Thanks!
 
1 - 20 of 138 Posts
Top