After posting yesterday, I decided to create an overview drawing of the VID connection schema.
The vehicle's connection points are to the left. the VID and the Display box are to the left. The Vehicle Speed Sensor (VSS) connects near the cruise control box (located under dashboard). The VID box receives the same power and ground as does the cruise control box. The device can therefore be restarted by cycling the power to the cruise control via the switches on the steering wheel. The injector pulse is connected (in this case) at the junction of the injector ballast resistor and the wire running to one of the fuel injectors in this engine. The display box is connected via a four conductor cable that currently terminates on the VID board as a 8 pin dip header/socket. The serial port connection to the USB and the laptop connects at the DB-9.
I have tentatively decided to soon release all electrical schematics for these devices. The idea being to encourage other interested folks to build such devices to aid in saving energy resources over the long run. And, if there turns out to be some interest in using the existing PIC18F firmware, I will make that available in the form of pre-programmed chips with the right to trade up to take advantage of periodic updates. Included with the chips will be open-source copies of the Windows based interface programs. As time goes on, and as the firmware for the various modules becomes more stable, I may release the PIC code as open source. For now, however, I will for a small handling charge (in addition to the cost of the chip itself), provide the pre-programmed PIC 18F series chip(s) to anyone who asks for them via email.
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