Tomas Soedergren
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  • Stockholm
  • Sweden
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Tomas Soedergren's Groups

Tomas Soedergren's Discussions

PX4 design flaw. IO board power regulator interferes with onboard magnetometer

Started Nov 28, 2013 0 Replies

Hi guys,I just realized that the sandwich combination of the PX4FMU and PX4IO brings the onboard magnetometer close to the ferromagnetic part of the IO board switching power regulator. This causes…Continue

How to connect a current & voltage sensor to PX4 ?

Started this discussion. Last reply by Tomas Soedergren Sep 18, 2013. 3 Replies

I suppose the PX4 with its IO kit has analogue ports to receive signals from the current and voltage sensor.I looked in the wikis for info on this without success. Only info available referred to…Continue

Tags: PX4, voltage, current, sensors

Pre-orders accepted - Charlene killer quad

Started Apr 26, 2012 0 Replies

Hi guys,Do we have any open source weaponry yet? Tried to search 3DR on line shop, but only peaceful things there...Check this. Frightening. But relax, it´s computer animated. Though.. in a very…Continue

Tags: humour, youtube, animation, jokes, waponry

Questions about WP parameter WP_MUST_INDEX and some other

Started this discussion. Last reply by Tommy Larsen Jun 24, 2012. 5 Replies

Hi, I have been searching for info on some WP parameters, without success (wiki not updated and no mouse-over helptext).Can anybody please explain how to use the following…Continue

 

Tomas Soedergren's Page

Latest Activity

Tomas Soedergren replied to Thomas J Coyle III's discussion Pixhawk Details #3: Digital airspeed sensor, multicolor led and USB
"Actually, I don´t think they are available yet. Wonder what´s taking so long...? Silence, secrecy.Five MONTHS since the initial announcement... :-/ I hope for a release soon of these very useful accessories.."
Feb 19
Tomas Soedergren replied to Jmoc's discussion Pixhawk Availability dates
"Anybody spotted these Pixhawk accesories available for order yet? Digital airspeed sensor External USB port External multicolor LED I2C splitter https://pixhawk.ethz.ch/px4/modules/pixhawk One would think as the Pixhawk has been on preorder since…"
Nov 30, 2013
Tomas Soedergren replied to MD's discussion New OSD
"+1 / Tom"
Nov 30, 2013
Tomas Soedergren replied to David Baker's discussion MinimOSD says "Update Charset" on bootup, must reset first
Nov 30, 2013
Tomas Soedergren replied to David Baker's discussion MinimOSD says "Update Charset" on bootup, must reset first
"I have now arrived at the conclusion that the PX4 needs longer time than the APM to boot and get going with Mavlink hartbeat transmission. More than the 5 seconds the minimOSD is programmed to wait for. Therefore even TELEM_DELAY at 0 will not do…"
Nov 30, 2013
Tomas Soedergren replied to David Baker's discussion MinimOSD says "Update Charset" on bootup, must reset first
"I am having this issue UPDATE CHARSETPX4 2.76 planeOSD fw 2.0 I have tried various TELEM_DELAY as recommended (default was 0) at no avail.Initially the two supply jumpers on the minimOSD was connected (supplying from 12V).I removed the solder…"
Nov 29, 2013
Tomas Soedergren replied to Rob_Lefebvre's discussion Anybody flying PX4?
"Rob, Do you use the PX4FMU onboard Compass? Or the external? The onboard Compass seems to have an interference issue caused by field interference from the IO board power regulator. This might not explain all of the issues you experience but it could…"
Nov 28, 2013
Tomas Soedergren posted a discussion

PX4 design flaw. IO board power regulator interferes with onboard magnetometer

Hi guys,I just realized that the sandwich combination of the PX4FMU and PX4IO brings the onboard magnetometer close to the ferromagnetic part of the IO board switching power regulator. This causes significant noise and corruption of the magnetometer data.For more info check my post on ardupilot.comhttp://ardupilot.com/forum/viewtopic.php?f=20&t=5022&p=6904#p6904I provide a video that illustrates the…See More
Nov 28, 2013
Tomas Soedergren replied to Tomas Soedergren's discussion How to connect a current & voltage sensor to PX4 ?
"Hi Robert, For the X-8 Project at hand I have the 3DR Power Module with current and voltage sensing. Though I only intend to use the sensing features, not the power regulator. The AttoPilot current sensor will work fine, connected to the curr solder…"
Sep 18, 2013
Robert McC replied to Tomas Soedergren's discussion How to connect a current & voltage sensor to PX4 ?
"@Tomas: Which Current/Voltage sensor do you have? I'm about to embark down this road also with an Attopilot 90A sensor from Sparkfun. Robert..."
Sep 17, 2013
Tomas Soedergren replied to Tomas Soedergren's discussion How to connect a current & voltage sensor to PX4 ?
"By studying the board user manuals and schematics I have been able to find out the following: [b]Battery monitoring [/b] Good and bad news: [b]Good[/b]: Battery voltage is per default measured on the battery Power input to the PX4 IO board, that two…"
Sep 14, 2013
Tomas Soedergren posted a discussion

How to connect a current & voltage sensor to PX4 ?

I suppose the PX4 with its IO kit has analogue ports to receive signals from the current and voltage sensor.I looked in the wikis for info on this without success. Only info available referred to APM-boards. Please, can anybody confirm that there is a proven way to connect the voltage and current sensor to PX4 and how to- or that the PX4 is not yet ready (then I can stop trying). Thanks / TomasSee More
Sep 11, 2013
Tomas Soedergren replied to Thomas J Coyle III's discussion Pixhawk Details #1: Overview of the PX4 board series (old and new)
"Thomas, thanks for the above info. I am on the pre-order list.   Regarding the solid state relays; were they not quite useful for camera / payload action Control? Or is this normally handled with dedicated digital output ports? / Tomas"
Sep 11, 2013
Tomas Soedergren replied to Thomas J Coyle III's discussion Pixhawk Details #3: Digital airspeed sensor, multicolor led and USB
"Good news! Want it all! ASAP...  "
Sep 10, 2013
Tomas Soedergren replied to Andrew Tridgell's discussion APM:Plane 2.74 released
"Well, that's food for thoughts."
Jul 30, 2013
Tomas Soedergren replied to Andrew Tridgell's discussion APM:Plane 2.74 released
"In my upcoming X8 project I considered to use the two parallel pitot tubes connected to the one sensor. For FOD obstructions that might help saving the day. Though again, it might provide a false sense of safety, unless one very carefully inspect…"
Jul 29, 2013

Profile Information

About Me:
Live in Sweden, Stockholm region
Please tell us a bit about your UAV interest
General fascinasion about UAV concept. I am also into aerial photograpy.
Hometown:
Stockholm

Tomas Soedergren's Blog

ArduCopter on Ice

Posted on February 29, 2012 at 4:00am 1 Comment

Hi folks!

I have been tinkering with the ArduCopter since autumn 2011. While still being lightyears from perfection I do appreciate the possibilities it brings and the community spirit here around is inspiring!

Here is a video from yesterdays test/ demo flights on the frozen Lake Maelaren (Stockholm, Sweden).

I use 3DR frame, stock motors and…

Continue

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