|Jaguar Build Choices (0.6-alpha edition, milage may vary)
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|Author:||Fred [ Thu Nov 07, 2013 7:24 am ]|
|Post subject:||Jaguar Build Choices (0.6-alpha edition, milage may vary)|
There are certain aspects of the Jaguar which require YOU to make a choice during the build and then do something differently. I hope to list each here with options and rational for each choice.
Choices/mods/etc that I've missed, PM me from the bottom of this post!
|Author:||Fred [ Thu Nov 07, 2013 7:30 am ]|
|Post subject:||VR versus Hall/Opto|
VR versus Hall/Opto
The Jaguar topology allows either type of input to be used, but with a different set of installed components. For the time being, please refer to the schematic page with this sub-circuit for more information about what you need to do, or not do, as the case may be.
For 0.6-alpha VR requires the following:
For 0.6-alpha Hall/Opto requires the following:
See the schematic for more information:
|Author:||Fred [ Thu Nov 07, 2013 7:56 am ]|
|Post subject:||High Current Grounding For FETs|
High Current Grounding For FETs
The three sot223 FETs share a single ground called OUT-GND, this should always be connected to ground via a single wire directly to the head/block/chassis/battery.
The 8 injector FETs have a ground each, and the ability to bridge grounds to share connections. If you do not bridge any grounds, you will require one ground wire to your ground point, per FET. While this seems overkill, it's actually not ideal at all. Ideal would be for 2 FETs to share 2 wires, for example. Some example configurations are given below:
In any of the above cases, say you have two more FETs in use on boost and idle, you bridge these together and share 2 wires between them.
Similarly for 6 and 8 cylinders, too.
|Author:||Fred [ Thu Nov 07, 2013 8:00 am ]|
|Post subject:||MAP Sensors SMD Internal vs. External|
Internal vs. External MAP Sensor
The MAP sensor can be left off the board if you have and want to use an external MAP sensor.
In the case that you use the internal sensor, you can leave diodes D47 and D48 out as they're not required.
In the case of an external sensor being used, you must leave off U6 and use the three connection points for the external wiring.
SMD MAP Options
If going internal, you need to select the appropriate MAP part to cover your pressure reading needs.
|Author:||Fred [ Thu Nov 07, 2013 8:07 am ]|
|Post subject:||LED Colour Advice|
LED Colour Advice
It's much better to use as many independent colours as possible, however there are certain things that should be kept separate:
|Author:||Fred [ Thu Nov 14, 2013 10:06 pm ]|
|Post subject:||FET Driver Polarity And Voltage|
FET Driver Polarity And Voltage
This SHOULD have been chosen before ordering your parts... but you may as well know before you solder anything on and make work for yourself replacing it later!
Ignition drive in FreeEMS is HARDWARE configured. In the case of the Jaguar, this is done by selecting a different FET driver part. The standard part is for non-inverting applications. This means that when the CPU slams 5V into the FET driver input, the FET driver output goes to either 5V or 12V depending upon the jumper installed.
5V is for logic level coils such as LS1 coils and some Honda/Denso COP units, etc.
12V is for normal darlington ignitors such as found on almost anything in the 90s and still some current engines
non-inverted is for all darlington non-smart ignitors and most logic level stuff too.
inverted is for weird stuff that requires a GROUND pulse to dwell the coil, or whatever else.
MOST PEOPLE WILL WANT 12V + NON-INVERTING
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