Sport Mode Mini Module
The objective here was to add Sport mode to my car, and add a tiny bit of smarts for DSC (remember the last setting across restarts, make it easier to get to "all the way off" mode for driving events).
The Sport mode modification requires the addition of pin 15 in connector X60004. When a momentary ground is applied to this pin, Sport Mode is toggled. We also add pin 8 in connector X17 in the instrument cluster to light the cluster lamp. This wants 12V to light the cluster lamp.
I designed a small microcontroller-based module to interface to the DSC unit and the DME (for Sport mode). I named it 'Sport Mode Mini Module' because it was the smallest of the designs I developed. It talks to the DSC unit for DSC, and the DME for Sport mode. It interfaces with the DSC button and an Apem IP LED-illuminated pushbutton (for Sport mode).
Below is a picture of two modules, each fitted into the bottom of their cases.
Status as of January 2, 2003
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I've put 5 days of driving on a module in my car, and it has thus
far been flawless. I wish it was easier to get road testing done
here in the winter, but I don't drive the M in salt or snow.
Three more boards are assembled, for which I have cases. These are for Drex, z3scot, and Mpire. A fourth is in line for MarkL, and a fifth for Dale.
I now have AWG20 wire for harnesses. I'm still waiting on other harness parts (more pin sleeves and connector housings). Sadly, the holidays seemed to push everything back.
Mouser contacted me today to tell me there's been yet another delay on the Apem IPR3FAD2LOS pushbuttons. They're now saying that my last order (placed December 15, 2003) won't arrive until the third week of February. Sadly, this appears to be the situation from other suppliers as well, and Kim @ Mouser told me that it's not a minimum order issue; Apem is backlogged on all of the LED-illuminated IP pushbuttons.
Car Logic
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The module needs to send pulses for DSC and Sport Mode, and light/unlight the Sport Mode lamp in the cluster and the LED in the Apem IP pushbutton. In the case of Sport Mode, I need to momentarily pull pin 15 in connector X60004 to ground. For DSC, I need to momentarily pull pin 4 on the DSC button connector (which leads to the DSC module) to +12V (see 3452.1-02 in the ETM). To light the Sport cluster lamp, I need to put 12V on pin 8 in connector X17.
Sport Mode Mini Module
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Follow the links to details on the module.
Schematic Here you'll find the electrical schematic for the Sport Mode Mini Module. PCB The board layout for the Sport Mode Mini Module. Parts The parts used to make the Sport Mode Mini Module. Assembled Board Pictures(s) of the Sport Mode Mini Module board after assembly. Harness Adapter Info on the adapter to plug into the DSC harness connector. Wiring Diagram Wiring diagram for the Sport Mode Mini Module. Case Info on the case for the Sport Mode Mini Module. DME wiring for Sport mode Installing pin 15 in connector X60004 and routing to the Sport Mode Mini Module in the cabin. Cluster Lamp Installation Installing the Sport cluster lamp bulb and X17 connector pin 8. Apem IP pushbutton Pictures of the Apem IPR3FAD2LOS pushbutton, before and after installation in my center console. Work Log Chronological work log.
Docs
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Atmel AT90S2343 (PDF)
Atmel ATTiny2313 (PDF)
Fairchild NDS355AN N-channel MOSFET (PDF)
ST LD1117 low drop voltage regulators (PDF)
ST VND600SP dual channel high-side solid state relay (PDF)
Alcoswitch industrial pushbuttons (PDF)
Apem IP Series pushbutton switches (PDF)
Apem AV Series pushbutton switches (PDF)
NKK KB Series illuminated miniature pushbutton switches (PDF)
NKK LB Series pushbutton switches (PDF)
NKK YB Series short body pushbutton switches (PDF)
ITW Series 57 miniature vandal-resistant pushbutton switch (PDF)
Olimex AVR-IO board (PDF)
Links
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Apem (apem.com)
Atmel (atmel.com)
custompcb.com
Digi-Key (digikey.com)
Drex's page on Sport mode
Force Electronics
Hawk Electronics (hawkusa.com)
ITW Switches (itwswitches.com)
logicalsys.com
McMaster-Carr (mcmaster.com)
MicroController Pros (ucpros.com)
- ABC Mini Board
- ABC Mini Board Hotchip Motherboard
- ABC Mini Board Quad Relay Module
- ABC Mini Board Quad N-Channel MOSFET Module
- ABC Mini Board Quad Input Module (non-isolated)
- ABC Mini Board Quad Opto-Isolated Input Module
Newark InOne (newark.com)
