Jaguar Ideas for the Future

[Fred]

(10:49:26) Fred: just noticed BIG space on under side of dpaks perfect for more perf board circuits

Wouldn't this be a noisy environment when the injectors are firing? Not sure if this would be a good idea for a prototyping area.

I didn't mean an official one. I meant home brew style, much like my digital input stuff that I have above the CPU. Just noting the large blank space there. And, with a solid ground plane under it, I doubt there'd be much noise.

(10:55:58) Fred: DeuceEFI: the diode pads for the led blockers are way too big for the std parts, some space to save there?

I do need to re-visit the size of all the solder pads, so there should be some space saving changes as these are re-sized.

I meant footprints, btw, pads seem mostly OK as is.

Could put vias on all of the dpak pads and cut around the vias on the other side. Not really necessary though. They won't get hot unless shorted.

I will give this some additional consideration.

Probably a worse idea than not doing it due to lack of heat possible.

The SMD XOR is smaller that the DIP XOR chip, but we are using a chip with the largest number of gates (4 gates) that I can find.

OK.

Note that two of the unused gates on the chip have their inputs tied to +5v.

Why? OK, I know why. But what I mean is, how about some pads so that they can be used for buffered inputs/outputs?

I have already moved the components for the MAP input around so that the diodes, capacitors and the resistor are not under the on-board sensor.

Is this pushed? Didn't notice it fly by. Curious as to what you've done.

Fred.

[DeuceEFI]

(10:49:26) Fred: just noticed BIG space on under side of dpaks perfect for more perf board circuits

Wouldn't this be a noisy environment when the injectors are firing? Not sure if this would be a good idea for a prototyping area.

I didn't mean an official one. I meant home brew style, much like my digital input stuff that I have above the CPU. Just noting the large blank space there. And, with a solid ground plane under it, I doubt there'd be much noise.

Ah, ok

(10:55:58) Fred: DeuceEFI: the diode pads for the led blockers are way too big for the std parts, some space to save there?

I do need to re-visit the size of all the solder pads, so there should be some space saving changes as these are re-sized.

I meant footprints, btw, pads seem mostly OK as is.

I could make the diode footprint for the 1N4148TA a bit smaller.

Could put vias on all of the dpak pads and cut around the vias on the other side. Not really necessary though. They won't get hot unless shorted.

I will give this some additional consideration.

Probably a worse idea than not doing it due to lack of heat possible.

Wow, that sentence went in a circle...

Note that two of the unused gates on the chip have their inputs tied to +5v.

Why? OK, I know why. But what I mean is, how about some pads so that they can be used for buffered inputs/outputs?

That sounds like a good idea

I have already moved the components for the MAP input around so that the diodes, capacitors and the resistor are not under the on-board sensor.

Is this pushed? Didn't notice it fly by. Curious as to what you've done.

The MAP input changes were completed as of Jaguar/dev hash: e34fd8be86214a16735834fee4bde7714db468be

[DeuceEFI]

(10:55:58) Fred: DeuceEFI: the diode pads for the led blockers are way too big for the std parts, some space to save there?

I do need to re-visit the size of all the solder pads, so there should be some space saving changes as these are re-sized.

I meant footprints, btw, pads seem mostly OK as is.

Jaguar/dev (A4) commit 6cbf1607161bcd6b9763c27b80840be76475198a has the new smaller footprint for the 1N4148TA diodes. I also moved the injector LEDs, the diodes and their resistors closer to the MOSFETs and moved P26 (Injector outputs) to the edge of the board instead of between the LEDs and the MOSFETs.

See the changes at: https://github.com/DeuceEFI/Jaguar/tree/dev
You will need KiCAD installed to open the files.

[flat4power]

Nice work

I'm waiting for this final revision A4

[Fred]

A4 is not the final revision. A4 is the next revision. So much change has gone into A4 that it will definitely have issues and need another run through with subtle changes only. Plus, nothing is final about any FreeEMS hardware for some months to come as the firmware stabilises.

I'll reply to Andy's posts later.

Fred.

[flat4power]

I know but my bad english is in cause
I would say I'm waiting rev A4 of Jaguar not final but just wait until the pcb is finalized for this rev

[Fred]

OK, I see. :-)

[flat4power]

is it possible and relevant to add a bluetooth module ?
Jaguar can be tune wireless on vehicule with a smartphone or a tablet (with an futur evolution of emstudio for android or iOs)

adding sd slot to log run ?

and is it possible to complete this table with Jaguar :

table comparison

[Fred]

Don't even try to compare FreeEMS with MS, it's not comparable in any way shape or form.

I strongly doubt that you'll see an SD slot on Jaguar. FreeEMS can be logged with a simple external device, though, so it's not a priority. Someone already did this at a motorsport event.

Bluetooth can be easily hacked into a jag in place of the stock USB. I don't think it belongs as stock, though.

[flat4power]

I don't want compare freeEMS to MS just know all the possibilities of freeEMS and present them in a board like linked below