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May 30, 2010, 03:48 AM
Just clumsy. Oh, forgetful too
MikeTheCrash's Avatar
Quote:
Originally Posted by Daniel Wee View Post

So you are saying that you can move the sticks and the ailerons are moving in the correct direction but that the stabilizer is moving in the wrong direction? Is this a normal setup we're talking about here?

Daniel

p.s. I'm off to church - will reply when I get back later.


on my twinstar the ailerons are reversed on the Tx and reversed in the DOSD+ custom settings. ailerons and menu selection functions as it should, except the stabilisation goes the wrong way in roll, pitch is fine. I have a feeling this might be one of the settings changed to make Mark's elevons work - I think it was mentioned, I'll see if I can find it.

for your new menu options I'm supposing that Elevon Mix should be set to 0 if you don't have any

thanks

Mike
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May 30, 2010, 04:41 AM
Registered User
magnetman,

The DOSD+ still draws power from the input side of the Deans due to the way it is connected. To get around this:-

1. Remove completely the solder bridge that was added when initially modifying the sensor board
2. Check that there is no continuity between the voltage output wire of the board to the positive tab of the input port (Deans)
3. Solder a piece of insulated wire or enamel-coated magnet wire from the positive tab of the output port (Deans) to the voltage output wire

This should cause the DOSD+ now to be powered off the output side of the Deans.

MikeTheCrash,

Check out version 8.4. The navigation controls now have their own direction options in the menu. Hopefully this will solve your problems.

Unless you are using EVN1 or EVN2 as your outputs, the elevon mix won't matter too much.

Daniel
May 30, 2010, 07:04 AM
Registered User
CrashingDutchman's Avatar
I have a bare ls20031 GPS module that I want to use with DOSD+

I need to have my connections from GPS to DOSD+ verified before I power it up. Can anyone confirm if my connections are ok:
Code:
DragonOSD+			LS20031

   1 TX    -------------------  2 RX

   2 RX    -------------------  3 TX

   3 GND   -------------------  4 GND
                     |
                     ---------  5 GND

   4 3V3   -------------------  1 VCC

   5 NV
Pin 5 at DOSD+ is not connected?

For reference: This image is where I got the pin config from DOSD+: http://www.forum.tsebi.com/download/file.php?id=709

and this is the datasheet I found for the LS20031: http://www.forum.tsebi.com/download/file.php?id=709 (page 8-9 of 13)
May 30, 2010, 07:57 AM
Registered User
CrashingDutchman,

The line on the board says GPS TX and GPS RX, and should correspond to the GPS TX and the GPS RX line. For more clarity, see this photo:-

http://forum.tsebi.com/download/file.php?id=645

Daniel
May 30, 2010, 08:46 AM
Registered User
CrashingDutchman's Avatar
Daniel,

Thank you, I will do it like this then:
Code:
DragonOSD+			LS20031

   1 TX    -------------------  3 TX

   2 RX    -------------------  2 RX

   3 GND   -------------------  4 GND
                     |
                     ---------  5 GND

   4 3V3   -------------------  1 VCC

   5 NV
May 30, 2010, 08:50 AM
Registered User
CrashingDutchman,

Now I see you're using the LS20031. Okay, that looks fine then.

Daniel
May 30, 2010, 09:10 AM
Registered User
CrashingDutchman's Avatar
deleted...
May 30, 2010, 09:11 AM
Registered User
CrashingDutchman's Avatar
Daniel, you posted while I was writing the previous message... I think I better delete it.
May 30, 2010, 10:39 AM
Registered User
CrashingDutchman's Avatar
Now I need to connect the current sensor. I have a Flytron sensor (datasheet). I read that the current sensor can also power the board if I put a jumper across J1 and the middle-pin of the power header

The sensor pins are configured like this:
- Ground
- Vout
- Signal

How would I go with the wiring? I am totally clueless.

Thanks in advance Daniel?
May 30, 2010, 10:46 AM
Registered User
Take a look at this photo, and pay particular attention to the letters in RED indicating:-

G, Isense and V2

These should correspond to Ground, Signal and Vout on the sensor.

Flytron's sensor has a different sensitivity from the SFE Atto's sensor. You probably need to half the Current multiplier or so, is my estimate. But you can always calibrate it correct using the following instructions:-

http://forum.tsebi.com/viewtopic.php?f=7&t=78

Daniel

p.s. Go here for more instructions http://forum.tsebi.com/viewforum.php?f=7
May 30, 2010, 01:49 PM
Registered User
JMSTECH's Avatar
Thread OP
Quote:
Originally Posted by CrashingDutchman View Post
Now I need to connect the current sensor. I have a Flytron sensor (datasheet). I read that the current sensor can also power the board if I put a jumper across J1 and the middle-pin of the power header

The sensor pins are configured like this:
- Ground
- Vout
- Signal

How would I go with the wiring? I am totally clueless.

Thanks in advance Daniel?
Wiring should be quite similar to the Sparkfun current sensor like shown here: http://forum.tsebi.com/viewtopic.php?f=7&t=64
where the ground is located on the left, volt in the center and signal to the right. However make sure the connection point "into" the OSD is proper... like Signal and voltage is switched around. See the post I did here: http://forum.tsebi.com/viewtopic.php?f=7&t=64 on the second photo. Then you will follow Daniel's instruction in regards to calibration if needed. You are almost there Crashingdutchman! Don't forget to take advantage to powering up your OSD off the current sensor by inserting a jumper like used in PC mother boards (square jumper you insert into the header pins) but connect to osd power pins 2 & 3. Pins 1 & 2 are for powering up directly through a lipo.

John
Last edited by JMSTECH; May 30, 2010 at 01:55 PM.
May 30, 2010, 02:08 PM
my karma ranover my dogma
galaxiex's Avatar
I would like to use a baro/airspeed sensor with the DOSD+.

Daniel shows one here.... (3rd post)

http://www.forum.tsebi.com/viewtopic.php?f=7&t=63

......but there are no instructions for building/configuring such a device.

Now, I know Daniel is a very busy guy, so can someone help out with making such a thing.

Daniel, if you get the chance, some details would be great!

Thanks!

btw.... no flying here.... it snowed again yesterday accompanied by high winds and rain.
Yes, that's right snow and rain.... kind of like slush falling out of the sky.
May 30, 2010, 03:09 PM
Registered User
galaxiex,

I need to dig up the part number - it's kinda expensive and I've not really tested it in flight. The barometric pressure/altitude sensor is separate from the air-speed (differential pressure) sensor.

Daniel
May 30, 2010, 03:20 PM
Registered User
CrashingDutchman's Avatar
Daniel, John,

Thanks for your answers. I got a 16% alcohol beer, so I think that was why I didn't see things clear anymore.

Will continue tomorrow evening!
May 30, 2010, 03:38 PM
Registered User
galaxiex,

I think this is the part:-

http://sg.farnell.com/honeywell-s-c/...sor/dp/1751290

It's kinda expensive but you may be able to get it (HSCMRNN001PG2A3) cheaper from Mouser or Digikey. The connections are pretty straight forward. There are 8-pins but only four are in use, and these correspond directly to the pins from the I2C header on the DOSD+ board. The only thing to do is to add a 0.1uF and a 1uF capacitor across the Vcc and Gnd pins. The exactly pinout can be found on Table 8 in the datasheet (attached).

You should find out how to correctly hook up the pitot system (DIYDRONES sells a kit). I should mention that setting things up for CAS (compensated air-speed) isn't as easy as most people think. On the upside, though - you probably don't need too much absolute accuracy, just relative accuracy would do.

For the barometric sensor, just grab one from Sparkfun (BMP085) or from DIYDRONES (SCP1000-D11 - do not get the SFE one, it won't work). As with such sensors, you need to mount them inside porous foam/sponge and place it where it is equalized with ambient pressure.

Daniel


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