99-02 odo, swapped OEM smd leds with white smd leds, +converting odo to OLED screen
03-02-2015, 07:58 AM
#248
Weekend update Got a couple of work packages done this weekend. Most important one being a tool to set the odometer. It's working great, we just need two more images to make it look pretty ;-)
Enclosure is almost decided, layout changes for enclosure are complete. Next up is generation of CAD data to have openings milled into enclosure.
Found and fixed a hard to find bug that caused a problem with splash screens if a certain pixel value was present.
Build the second compass module so after testing it everything is ready to ship serial number 0000002 to LT4vert for installation in to his Camaro.
Drilled the front plate of the bench test box, but need to get a new drill today after work.
Enclosure is almost decided, layout changes for enclosure are complete. Next up is generation of CAD data to have openings milled into enclosure.
Found and fixed a hard to find bug that caused a problem with splash screens if a certain pixel value was present.
Build the second compass module so after testing it everything is ready to ship serial number 0000002 to LT4vert for installation in to his Camaro.
Drilled the front plate of the bench test box, but need to get a new drill today after work.
Last edited by Fieroluke; 03-02-2015 at 08:00 AM. Reason: Missed something
03-02-2015, 04:54 PM
#250
Enclosure CAD
03-04-2015, 04:53 PM
#252
Here is the cad drawing and 3d render of the main circuit board enclosure. The 3d render is not showing the top portion of the enclosure.
Another nice surprise I forgot to mention, this will work in ALL 4th gens and 3rd gens. Oliver coded it for 2000 ppm or 4000 ppm input for speed, from that input mileage and trip info is scaled.
Another nice surprise I forgot to mention, this will work in ALL 4th gens and 3rd gens. Oliver coded it for 2000 ppm or 4000 ppm input for speed, from that input mileage and trip info is scaled.
03-04-2015, 05:16 PM
#254
Mileage and trip- coded and scaled accordingly per the speed sensor input. Mileage is programmable and trip can reset like factory.
Compass- separate input via a module you must mount in a suitable location in the car.
Air temp- you must fabricate mounting of a c5 vette ambient air temp sensor in a suitable location in your car.
Time- internal programming and settable. Time is kept when battery is disconnected via a button cell battery backup.
Splash screen and background- both are customizable so long as the image is 160x128 px.
Uploading firmaware, images ect is handled via laptop and usb connection to main board.
In short, thats the basics.
03-04-2015, 09:11 PM
#255
Wow, here I thought the speed info for the cluster came through the OBDII. Guess I should have known better than to think they updated those parts on these cars lol.
I really really like all this. Hopefully it will still be a thing whenever I do my LS swap... *dreaming*
I really really like all this. Hopefully it will still be a thing whenever I do my LS swap... *dreaming*
03-04-2015, 09:51 PM
#256
Nope, the 4th gen clusters use a 4000 ppm signal from the pcm. The plan was to get the mileage/trip info from the cluster but in the name of simplicity and keeping things convertible Oliver programmed the mileage/trip scaling to be contained to this unit, much like adding an aftermarket speedo to your car that has its own odometer.
03-05-2015, 12:24 AM
#257
- J1850VPW is obsolete, new cars use CAN bus. As a result, the components are no longer available: level shifters need to be built using discrete components, and very few processors are still available with J1850 on chip. The ones that are have only little memory - too little for a color display. An external memory would have to be used for images and gfx. Still Ram would only be 1K, too little for gfx operations. And they are slower that current processors as well.
- there is little useful info available on the OBD2 bus for a trip computer. The odometer reading messages are not documented officially, neither is the trip odometer.
- using OBD2 would make this project specific to one model F-body. Using the VSS input makes it universal for almost all GM vehicles and probably even more.
Last edited by Fieroluke; 03-05-2015 at 12:47 AM.
03-06-2015, 02:51 AM
#259
That is the plan. Electrically yes, it will be plug and play for virtually all GM vehicles of the past 30 years. The customization to the car is done entirely in software, i.e. miles or km, Fahrenheit or Celsius, 4000 or 2000 ppm VSS signal, C3/P4 ALDL support, GPS support, CAN support - this is all done by installing custom firmware versions. The splash screen and background gfx can also be customized by loading firmware-addons.
Mechanically of course you have to do some modifications depending on what car you have, because no vehicle was of course prepared for this. The easiest is an F-body cluster with digital odometer, since the OLED display was designed for it. The display module fits into the stock "cradle" and replace the digital odometer module. It has the same "thickness" (or height) as the digital odometer module, but is slightly larger, so the opening in the plexiglass lens carrying the gauge face must be slightly enlarged at the bottom, and the cutout in the gauge face must also be enlarged. Maybe LT4vert will offer a replacement gauge face with the properly sized cutout. It's all a matter of quantities and cost.
You also need to install at least one pushbutton switch somewhere to operate the module. The stock reset button is not used for this purpose because you want to operate the trip computer while driving, and it's not a good idea if you have to reach through the steering wheel to do that.
Does that answer your questions?
BTW: The first prototype destined to be installed in a Camaro is going in the mail today! LT4Vert, watch your mailbox! I'm sure he'll post when it arrives and maybe even post an occasional picture during the install ;-)
Mechanically of course you have to do some modifications depending on what car you have, because no vehicle was of course prepared for this. The easiest is an F-body cluster with digital odometer, since the OLED display was designed for it. The display module fits into the stock "cradle" and replace the digital odometer module. It has the same "thickness" (or height) as the digital odometer module, but is slightly larger, so the opening in the plexiglass lens carrying the gauge face must be slightly enlarged at the bottom, and the cutout in the gauge face must also be enlarged. Maybe LT4vert will offer a replacement gauge face with the properly sized cutout. It's all a matter of quantities and cost.
You also need to install at least one pushbutton switch somewhere to operate the module. The stock reset button is not used for this purpose because you want to operate the trip computer while driving, and it's not a good idea if you have to reach through the steering wheel to do that.
Does that answer your questions?
BTW: The first prototype destined to be installed in a Camaro is going in the mail today! LT4Vert, watch your mailbox! I'm sure he'll post when it arrives and maybe even post an occasional picture during the install ;-)