Puma board for FreeEMS

[nitrousnrg]

News I forgot, it has a load/run header now. It was quite important and wasn't present, probably because TA's schematic put the switch inside an 'optional' box.

More silkscreen work from Jared is included, RF ring, and a pile of good stuff here and there ;-)

[jharvey]

Did we want an LED for the injector circuit(s)? There is and LED option for the ignition circuit, such that it will blink with the coil charging. An LED could probably fit on the bottom side of the board. It's a bit tight there.

[nitrousnrg]

Yes, we want!

Its tight, but i think 2 0805 chips can fit horizontally between the power transistors. It would be over the silkscreens, though.

Are you doing it? If not I'll wait for your other changes and put the leds when we're in sync.

[Fred]

LED, power, ign, fuel, pump, it'd be nice to have indicators for the main functions, and when i say power, i mean key on, not full time power. 2 more, go on, you know you want to :-)

You guys are both legends! :-)

Fred.

[Fred]

Oh, and two more key ones if there is room, RPM Inputs, one each.

Power (1) = board is alive
Pump (1) = cpu is alive
Inputs (2) = sensors/connections inbound are alive
Outputs (8+4) = RPM is being read, and configuration of things is what it appears

Each provides different and important feedback IMO. I'd probably go without the outputs from those, if i had to, but all are useful, very.

Fred.

[jharvey]

http://www.mpja.com/prodinfo.asp?number=17806+BX

Will this work?

Gearhead

This should really be talked about here. So I'm migrating it.

[nitrousnrg]

i'm totally out of battery, I'll check that later :-)

A while ago I found an error, caused by a forgotten (my me) label at the CPU schematic.

VDDPLL is't conected to the the 5 v supply(!) BUT, a little bridge will fix that. I'll put images later, but luckily the who components to bridge are no more than 20mils away :-)

[Fred]

Speaking of which, did you tag the repo at spin1 so we know what we're dealing with EXACTLY? Please figure out, by timing, where exactly it was, and tag it if not.

Fred.

[nitrousnrg]

yes, I commited/tagged it yesterday but I'm pushing now. The tag is correct, it has same files that has been sent to the manufacturer.

The error is something that everyone will have to fix in Spin1 (in the 37 prototype boards, the design is corrected now).

To get the PLL running: bridge R181 and C95 like this:



Is it clear? In the image you see the revised tracks, in the Spin1 boards the Capacitor isn't connected to 5v. Too lazy to switch back to an older commit to show the real Spin1, if this happens again I'll have to do it right.

I'm recalculating TA's PLL components value (an R and two C). Too fancy values... I just don't have them.

[Fred]

yes, I commited/tagged it yesterday but I'm pushing now. The tag is correct, it has same files that has been sent to the manufacturer.

You're a good man, Marcos.

That fix is dead easy, thanks for the diagram!

Fred.