Post your PCB

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barthess
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Post your PCB

Postby barthess » Thu Dec 01, 2011 11:57 am

Giovanni,
Thanks for patience, the promised photos there. First two are ready device with some debugging wires, other two are scans of corroded board used for quality check.
http://www.freeimagehosting.net/c07de
http://www.freeimagehosting.net/15cc8
http://www.freeimagehosting.net/c4190
http://www.freeimagehosting.net/8bcd7

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Giovanni
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Re: STM32F4DISCOVERY board (trunk)

Postby Giovanni » Thu Dec 01, 2011 12:01 pm

Could you upload them in the forum? from here I cannot access sharing sites like the one you used :( or I will be able to see them in the evening at home

Giovanni

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Re: STM32F4DISCOVERY board (trunk)

Postby noether » Thu Dec 01, 2011 2:21 pm

barthess wrote:Giovanni,
Thanks for patience, the promised photos there. First two are ready device with some debugging wires, other two are scans of corroded board used for quality check.
http://www.freeimagehosting.net/c07de
http://www.freeimagehosting.net/15cc8
http://www.freeimagehosting.net/c4190
http://www.freeimagehosting.net/8bcd7


Hello Barthess, is this board for an fixed-wing autopilot (because the two pressure sensors)?
I have a question if you do not mind, how are you connecting electrically the two sides? are the vias plated or something?

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Re: STM32F4DISCOVERY board (trunk)

Postby barthess » Thu Dec 01, 2011 3:27 pm

noether wrote:Hello Barthess, is this board for an fixed-wing autopilot (because the two pressure sensors)?

Yes. A friend of mine (real pilot in past) is fond of aircraft modeling. He build airplane, I am build autopilot (really interesting for me) board. But not only fixed wing. Why would not it drive a helicopter?
noether wrote:how are you connecting electrically the two sides? are the vias plated or something?

Vias, drilled and connected with soldered wire.

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Re: STM32F4DISCOVERY board (trunk)

Postby noether » Thu Dec 01, 2011 5:22 pm

barthess wrote:
noether wrote:Hello Barthess, is this board for an fixed-wing autopilot (because the two pressure sensors)?

Yes. A friend of mine (real pilot in past) is fond of aircraft modeling. He build airplane, I am build autopilot (really interesting for me) board. But not only fixed wing. Why would not it drive a helicopter?
noether wrote:how are you connecting electrically the two sides? are the vias plated or something?

Vias, drilled and connected with soldered wire.


I have started the same project employing the same microcontroller. Actually I was using FreeRTOS in the past but I have chosen ChibiOS for this new micro, this is how I have found this forum. I have done other autopilots in the past (employing the AT91SAM7S + FreeRTOS), maybe if you are interested we can be in contact as we are going (it seems) to use the same RTOS for the same application :P.

About the vias, thanks for the response.

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Re: STM32F4DISCOVERY board (trunk)

Postby Giovanni » Thu Dec 01, 2011 7:03 pm

Finally saw the images, I must say that you are damn good at this :-) It is an excellent work considering it is home made. Last time I made a printed circuit it was an AM radio and It was 1976 I think LOL.

Yes, it is a shoes box.

shoes1.jpg
shoes1.jpg (35.95 KiB) Viewed 4826 times


Detail of the circuit.

shoes2.jpg
shoes2.jpg (33.15 KiB) Viewed 4826 times


Giovanni

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Badger
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STM32F4DISCOVERY board (trunk)

Postby Badger » Thu Dec 01, 2011 8:16 pm

Seeing as we're in 'post your pcb' mode, here's mine!
_MG_9168.JPG
Prototypes..
_MG_9168.JPG (91.13 KiB) Viewed 4827 times

The board on the left is my first prototype, has a LQFP48 STM32F103. After a few soldered on wires it works fairly well! The second board is my latest, with an STM32F4, all it does so far is flash an LED (using Chibios of course). But there are a few design flaws which makes it unstable (mostly not connecting the ground to the crystal..), so my new design which is ready to send off will hopefully be a lot better. All of these boards have an ITG3200 gryo and LM303 mag/acc.
v2.2.png
v2.2.png (62.97 KiB) Viewed 4827 times

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Re: Post your PCB

Postby Giovanni » Thu Dec 01, 2011 8:45 pm

Nice work Badger.

This reminds me that some time ago, in the old forum, there was a proposal about creating a "Chibi Board", probably such a project would be worth considering again.

Giovanni

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Re: Post your PCB

Postby Badger » Thu Dec 01, 2011 9:14 pm

A "Chibi board" would be nice, although I don't see how it would be much different from one of the many dev boards available and compatible with the project. Having said that, it could attract new users by offering an obvious start point, a bit like Arduino. I suppose something that shows off the various drivers nicely!

Here's some proper proof of my STM32F4 flashing LED: http://www.youtube.com/watch?v=kZLkjqd79Hg

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Re: Post your PCB

Postby Giovanni » Thu Dec 01, 2011 9:39 pm

Good point, hard to do something different from existing boards. However I was considering the idea to make some kind of base board for the STM32F4-Discovery adding the serial port, Ethernet PHY and connector, CAN and other gadgets missing from the naked Discovery. I think it would be interesting for the many existing Discovery owners (I would get one if such a thing existed).

Giovanni


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