APM Oil Pan!

Is 2:22AM (when i started writing this) and i can't sleep, so i decided to write this post.

I been working "hard" and the fastest i can to finish this thing, theres only one step remaining in order to start the "mass" production of this board.

This is how the last step will be done:

-A unique assembled board will be shipped from California to Spain.

-Then Jose Julio in Spain will open his "Surprise Board" and make us the great favor to all of us of checking the board integrity and the harmony of all the components on it (thanks in advance JJ).

-That includes checking some new components i can't mention right now.

-If Jose Julio says 'Si", then i will start the mass production.

By now SparkFun is straggling trying to supply all the components and test bed for APM. It will be released soon.

The board is kinda of big right now. This board will be called the "huge" version. When the code becomes very mature i will create a an smaller version of the APM and APM Oil Pan without the multiplexor on the APM and without the bulky FTDI chip on the APM Oil Pan, so i can save 30% of the size. This one will be called ArduPilotMega "In my way" version. ;-)

Oil pan stands for the old shield name. The difference is that the shield goes into the bottom of the ArduPilotMega board.

~~I decided to let the community guess the rest of the specs for ArduPilotMega Oil Pan, because write stuff in English make me drowsy. The best guesser will receive a $50 certificate. ;-)~~

Come 2:56AM!!

For the sake of completeness, here's an updated diagram:

There are still a few caps I couldn't label due to a lack of space, so here's some descriptions to go along with the picture.
- The relay is probably a Tyco IM03GR, in which case, you may want to buffer that coil driver signal.
- There are 4 pull-up (to 5V) resistors above the dip switches.
- There are 3 caps on the outputs of the ADXL335 to make the ADC sampling circuitry happy
- There are various caps and resistors around both gyros for power supply bypass and signal filtering as suggested by the datasheets.
- There is a single bypass cap under the FT245RL chip and a bulk cap on the 5V rail.

I'm sure I'm missing some stuff, but this will probably be my final submission.

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Comments

Riccardo Kuebler March 1, 2010 at 2:48pm

Better said "rocker cover", then :) ?

Ric
John C. March 1, 2010 at 2:45pm

So when I think Oil Pan, I think "underneath".

It appears that this board is still designed to mount on top of the APM, right?

Thanks!
Developer

Jordi Muñoz March 1, 2010 at 1:54pm

Hi Freddy,

- They are not R/C Filters for AVR ADC's

The Relay is an IM23GR, it uses 10mA for the coil (5V), so i calculate 500 ohms of resistance. AVR pins can handle 40mA easily. Is a great "TLL compatible" relay, i love it, but very difficult to find! So not buffer required.

The IM03GR you mentioned requires 28mA!! But still ok, i feel more secure with the other one.
Freddy Gauss March 1, 2010 at 1:30pm

For the sake of completeness, here's an updated diagram:

There are still a few caps I couldn't label due to a lack of space, so here's some descriptions to go along with the picture.
- The relay is probably a Tyco IM03GR, in which case, you may want to buffer that coil driver signal.
- There are 4 pull-up (to 5V) resistors above the dip switches.
- There are 3 caps on the outputs of the ADXL335 to make the ADC sampling circuitry happy
- There are various caps and resistors around both gyros for power supply bypass and signal filtering as suggested by the datasheets.
- There is a single bypass cap under the FT245RL chip and a bulk cap on the 5V rail.

I'm sure I'm missing some stuff, but this will probably be my final submission.
Developer

Jordi Muñoz March 1, 2010 at 12:59pm

Don't forget the picture with arrows! ;-)
Developer

Jordi Muñoz March 1, 2010 at 12:58pm

Any more guesses? Still some components (including LEDs) that could be mentioned to earn extra points. ;-) I will close this little competition tomorrow at 12PM (pacific time)! Thanks to everybody!
Freddy Gauss March 1, 2010 at 12:55pm

The missing part is a relay. It's from the ServoSwitch V10 from Jordi's store.
Developer

Jordi Muñoz March 1, 2010 at 12:50pm

I didn't know that the Oil pan is the bottom of the motor where the engine oil is stored when is not running. Doah!! I Spanish is called "Carter". I made a hole in my pan oil of my car time ago, i had to buy a new Engine parts, luckily in Mexico is 90% cheaper.
Developer

Jordi Muñoz March 1, 2010 at 12:46pm

Remember right guesses on passive components will give extra points!!
Developer

Jordi Muñoz March 1, 2010 at 12:45pm

One part still missing... You will have to download eagle files from the store if you want to figure it out.

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