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Post your PCB
Posted: Thu Dec 01, 2011 11:57 am
by barthess
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/c07dehttp://www.freeimagehosting.net/15cc8http://www.freeimagehosting.net/c4190http://www.freeimagehosting.net/8bcd7
Re: STM32F4DISCOVERY board (trunk)
Posted: Thu Dec 01, 2011 12:01 pm
by Giovanni
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
Re: STM32F4DISCOVERY board (trunk)
Posted: Thu Dec 01, 2011 2:21 pm
by noether
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?
Re: STM32F4DISCOVERY board (trunk)
Posted: Thu Dec 01, 2011 3:27 pm
by barthess
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.
Re: STM32F4DISCOVERY board (trunk)
Posted: Thu Dec 01, 2011 5:22 pm
by noether
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
.
About the vias, thanks for the response.
Re: STM32F4DISCOVERY board (trunk)
Posted: Thu Dec 01, 2011 7:03 pm
by Giovanni
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 (35.95 KiB) Viewed 7812 times
Detail of the circuit.
- shoes2.jpg (33.15 KiB) Viewed 7812 times
Giovanni
STM32F4DISCOVERY board (trunk)
Posted: Thu Dec 01, 2011 8:16 pm
by Badger
Seeing as we're in 'post your pcb' mode, here's mine!
- Prototypes..
- _MG_9168.JPG (91.13 KiB) Viewed 7813 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 (62.97 KiB) Viewed 7813 times
Re: Post your PCB
Posted: Thu Dec 01, 2011 8:45 pm
by Giovanni
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
Re: Post your PCB
Posted: Thu Dec 01, 2011 9:14 pm
by Badger
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
Re: Post your PCB
Posted: Thu Dec 01, 2011 9:39 pm
by Giovanni
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