racingmini_mtl wrote:I have previously posted pictures and a brief description of the first version of this unit. This is the revised version. This is a collaboration between Sebastien Giroux (93white3400z) and myself; I have done the hardware and some small specific aspects of the firmware and Sebastien has done most of the firmware and all the configuration software.
Besides the standard Teensy, all the boards are custom ones to be able to package a lot of features inside a standard 52mm / 2 1/16" gauge enclosure. The first version used a 1.3" monochrome OLED display (128x64). This was a small limitation so I decided to make my own board for this version to support a 128x128 1.5" colour OLED display; that's pretty much the largest display that can still fit inside the enclosure. The setup is still compatible with the 1.3" monochrome Adafruit display.
There are 3 boards besides the Teensy. The top board is for the display but also includes 2 LEDs at the top and there's an ambient light sensor on the left of the display. The pictures below show it populated without the display, the light sensor or the headers.
The second board is the base board. It has the 3.3V and 5V power supplies, a socket for the lithium battery that powers the Teensy RTC (the Teensy has the RTC crystal soldered to it), a buzzer with its driver, a microSD socket, a CAN transceiver, a low current driver for a digital output or PWM, conditioners for 2 digital inputs, drivers for a small stepper motor (for an analog gauge). It also interfaces with the Teensy. The pictures below show it populated except for the headers (which are numerous).
The third board is the sensor and connector board. It has a 9 DoF sensor (3-axis accelerometer, 3-axis gyroscope, 3-axis magnetometer), a temperature and humidity sensor, a baro sensor, and RS232 interface, and a GPS module. The pictures below show it populated except for the headers and connectors.
I also needed to create a fourth board to allow the USB cable to go out the bottom of the enclosure. This is a very small board that is used to have a 90 degree connection to the Teensy USB connector without the bulk of ready made cables. The picture below shows the board with the connector (wires will be soldered to the pads at the bottom). The size of the board can be assessed from the background; this is the 6 position connector behind it which is bigger than the board.
The pictures below show what the complete stack of boards looks like when all the headers, standoffs and connectors are in place and ready to go in the enclosure. (Click on the picture for a larger version)
The pictures below show the complete unit from the front, the back and the side. As mentioned above this is a standard 52mm gauge enclosure. There is a 10-position and a 6-position Molex connector, a USB extension cable to connect to the Teensy USB port and a GPS antenna cable. (Click on the picture for a larger version)
Jean
EDIT:
Here's a list of the people who have expressed interest in buying one. The order is the one in which this was mentioned and in which I will go through for the initial limited batch:
- Manu
- Zaphod
- richyvrlimited
- Trev16v
- coizamora
- Suprazz(*)
- tpsretard2(*)
- arran
- krisr
- boofhead
I have put (*) besides a couple of names because they did show interest but did not specify that they where interested in getting one. I you want your name removed let me know. If others want their name added let me know also. This limited batch is for only 8 complete units so we are already there or above.
Both Jean and I are actually native french speakers (from Québec) but personally I wouldn't use a translated version of anything cars related (I tend to not know any of the technical words in french 
) but it's good to have anyway.
. 
