Photon Pin-Out Preview

Hardware
41

@Jack,

we will work on some examples and share about VBAT once things are tested out :smile:

42

Can I get a high-res of this so I can print my own? I ordered bare photons.

43

Hi! Here is a bit higher res, you should be able to get to it by opening the image in a new tab and zooming in.

44

Hello @BDub, in the Photon SMD, is it allow to connect a trace to a pint from the “inside” of the Photon?

The “keep out, exposed copper on the Photon” makes me think it might not work. I guess it is all about what signal is the one exposed.

I highlighted in yellow what I mean.

Thanks!

45

Yes that’s ok, as long as it’s not exposed copper between the two dashed lines. The reason is because the exposed copper on the bottom of the photon from the header through holes would likely create a short circuit to it.

46

Got it.

So it is ok for a trace to pass through the dash lines, but it would not be ok to have an exposed via there. Right?

47

Yes, but just to be on the safe side I’d recommend running the trace directly between the pads.

48

Can you upload this as a PDF instead?

49

A PNG to PDF converter spat this out, would that work?

edit: changed the file according to the update by @christine

50

Thanks @BDub

51

Hi, y’all. We’re planning to update this card to be a little more clear, just changed the image in the original post to reflect this. Posting again here for good measure:

52

Where in the documentation is there a mention of SPI1.begin ? When I read the docs, the only details I see are about setting up the SPI, and it shows SPI.begin. I see there are two spi ports, so it looked like i needed to choose the right one… Looking into that I came across this reply showing how to access both… great, But shouldnt this actually be documented ?
If it is, please can you tell me which docs to be reading.
Thanks

53

There is mention of SPI1 in the docs, but there should be more mention of it right up front with an example :wink:
https://docs.particle.io/reference/firmware/photon/#spi

void setup() {
    //SPI1.setClockSpeed(1000000); // defaults to 15MHz
    SPI1.begin(D5);  // explicitly set D5 to SS (user must control this pin)
}

void loop() {
    digitalWrite(D5, LOW);
    SPI1.transfer(0x55); // D4 CLK, D2 MOSI, D3 MISO, D5 SS
    digitalWrite(D5, HIGH);
    delay(500);
}
54

If I click on the link, the only mention of SPI1 is : SPI1 - 30 MHz which can easily be overlooked.
Is there a formal way of us ’ end users’ contributing to the docs?

Thanks .

55

On the top of the page is an "edit" button, which should take you to the relevant GitHub page. There you can open issues, or issue pull requests :smile:

56

Does anyone have the pinout preview for the Electron? I have been trying to find one like the one that comes with the Electron packaging.

57

Like this?

58

Yes

UPDATE:
I was actually looking for something more like this:

Its more easy to follow, and it has the PWM pins labelled. :smile:

59

The pins with TIMx_CHy are PWM pins and this even tells you what timers/channels are used to see which PWMs are independetly usable and which aren’t (same TIM/CH combo).

60

Oh. I didn’t notice that. That’s nice to have on the diagram.