Dan's PNP RB25DET R33 Skyline ECU PCB

[Dan]

For reference for me (and anyone else interested)

A batch of 10 of these PCB's from Seeedstudio are going to cost $129.90 USD + freight to me (using 20cm x 20cm pcb size). This makes the cost per PCB ~<$15 USD each.

I could trim the PCB down to 15cm x 15cm (possibly worth doing) which would reduce the cost for a batch of 10 down to $78.90 USD + freight to me. This makes the cost per PCB ~ <$10 USD each.

I will probably look into this once layout is completed (very very soon) as I think it is worthwhile doing from a cost per PCB point of view.



Stay tuned!

[Fred]

That's a terrible idea! :-p Don't do that, 15usd/each is SFA/each IMO/each. Cutting the board to smaller than it needs to be to mount in that case = fail IMO/each.

[Dan]

If you havent looked, i am talking about 2mm off the y dimension and i think 4mm off the x. But yeah i agree, it is still cheap either way.

[Fred]

OK. Still, you'll lose your overlap and board stability/support. But if you can swing it marginally, maybe.

[Dan]

yep, i won't do it if it compromises stability/support.

Just a random thought!

[Dan]

cool new hardware section Fred!

Nicely done!

Going to be doing some more work on this over the next few days (weekend).
just have to knock some uni work over. But that is almost completed.

Hoping to place the first PCB order in the next 7-days

[Dan]

Ok so I am set back a week due to tertiary study but I am getting back into this again slowly between assignments

I have done and am still doing, some AAC pulse width vs. CLT sensor voltage logging. This should give us a good head start for idle valve tuning

Will post results after i complete my analysis

Hardware dev is going well, i think a full day on it is all that remains before PCBs can be ordered

Will post more as it takes shape!

Dan

[Fred]

I have done and am still doing, some AAC pulse width vs. CLT sensor voltage logging. This should give us a good head start for idle valve tuning :-)

Will post results after i complete my analysis :-)

Awesome, thank you!!! <3

Before you order, but after you're pretty sure you want to, do a PDF and seek some review by Andy especially, and anyone else reading, too.

Fred.

[Dan]

Before you order, but after you're pretty sure you want to, do a PDF and seek some review by Andy especially, and anyone else reading, too.

Fred.

Yep I will certainly be doing that and I am going to send you and Andy a blank PCB for review / keep-sake anywho.

[Dan]

CLT vs AAC Analysis complete



Refer to attached PDF of results.

PWM frequency is 166.67Hz.

I still need to identify the value of the pull-up resistor on the CLT sensor and then identify the sensor's curve to determine exact temperature, but you get the idea.