Paul Atkin
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  • Natick, MA
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Need step by step guide for Storm32 SBUS connection to PX4

Started this discussion. Last reply by Paul Atkin Jul 19, 2015. 32 Replies

Hi,was anybody able to make this board to communicate with pixhawk via sbus?I see some instructions here:…Continue

Need a battery advice

Started this discussion. Last reply by Paul Atkin Jun 26, 2015. 1 Reply

Hi,I am stumbled with an odd situation.I am using Zippy 25C 4S batteries for smaller craft that drains 13-14A at loiter and decided to use them in parallel for a Tarot 690S that uses 4006 680kv…Continue

Copter 3.3rc5 Compass parameters and configuration

Started this discussion. Last reply by Mike Kelly Jun 23, 2015. 5 Replies

Hi,I could not get any answers in the other threads so may be making a new one will draw some attention.Looking into set of parameters in the MP I see this list.It makes one presume that it is…Continue

Does this sonar work with 3.3 rc5?

Started Jun 9, 2015 0 Replies

Hi,Do I understand it correctly that I would need to get source code and recompile it myself on my Linux to activate sonar options? Or is there a precompiled firmware somewhere that has it active, to…Continue

 

Paul Atkin's Page

Latest Activity

Ragnar Johannesen replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"@Thomas I used 10 because of thermal issues. 3 of them would dissipate ~21w@60A load but 10 would only dissipate ~6.3w@60A and safe without heatsink(?) BTW. Looks like Emcotec has a turnkey…"
Oct 18
Thomas Butler replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"@Patrick, Yeah! That's what I was talking about. They use three 24A/190A burst MOSFETS in parallel with a couple of flip-flops set by PWM. Although it is only for 3S, some beefier MOSFETs would fix that. Additionally, probably some…"
Oct 17
Patrick Poirier replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"@Thomas, Looking at these rules http://www.aerialroboticscompetition.org/downloads/mission7rules_013017.pdf There is an official Kill Switch design that looks a lot like your design !!…"
Oct 13
Henry Eden-Mann replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"Another reason not to use the motor-interlock/emergency stop feature is the of the pilot's usage of an APM2.6/2.8 board. These features are not compatible with these versions of APM, if anyone has managed to overcome this, I would accept that…"
Oct 12
Ragnar Johannesen replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"I did something like this a time ago, inspired by a product already on the market(can't remember it's name). Put 10 IRFZ44N in parallel, added some pullups and pulldowns and two switch connectors. One connector turned the MOSFETs off when…"
Oct 12
Thomas Butler replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"@Ultrafudge, The objective is to shut down the copter when the software has gone haywire...i.e., no reliance on the flight controller. A totally independent failsafe way to turn off."
Oct 12
Ultrafuge replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"What is wrong with 'Emergency Stop' and 'Motor Interlock ' ? http://ardupilot.org/copter/docs/channel-7-and-8-options.html92"
Oct 11
Thomas Butler replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"hey @Patrick, this is good! Getting some design issues talked about for our new "kill" switch...I suppose it would be a kill switch that takes advantage of the added circuitry to create a master power switch too. I have not looked at the…"
Oct 11
Patrick Poirier replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"@ Thomas, your design is good, just call it a Remotely Controlled Master Switch .... not a Kill Switch ;-) To illustrate the difference and the risk associated, lets say that you need a constant radio signal to activate the Master Switch, what…"
Oct 10
Thomas Butler replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"Forget about added parts and weight for the moment. What we are pursuing is a method that will work which will allow the user to turn power on and off remotely.  Then we can worry about the costs...and optimize! Adding more MOSFETs is NOT going…"
Oct 10
Patrick Poirier replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"@Thomas Nice diagrams :-) By design, any components that you add to the power supply can be a source of failure. Adding multiple components in parallel as you are suggesting can attenuate this risk but add to the BOM and Weight because these active…"
Oct 7
Thomas Butler replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"HK sells a switch device that connects to a spare channel of the RC receiver...I have NEVER had an RC transmitter or receiver fail so this is a reasonable approach. I have looked at single channel RC xmitter and receivers; none available. @Patrick…"
Oct 7
Patrick Poirier replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"I think its all depends on how you calculate the risk mitigation. The Kill Switch by design is used as the last option in the chain of command, and depending on the requirement, you might have to trigger it from an independent control system , i.e.…"
Oct 6
Henry Eden-Mann replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"I think a solution in combination with both of your proposals would be perfect.  Does anyone know of any cheap 1 channel radio receiver? or actually, you could just use an existing channel on the quads receiver and monitor the PWM cycle…"
Oct 6
Patrick Poirier replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"Yep, so lets make in work for good !! The solution I am submitting here is a Kill by Design, cheap-lightweight and lethal. The Attiny sketch I am using to trigger the SCR is about 30 lines and the 3 components could be easily integrated on the…"
Oct 6
Thomas Butler replied to Paul Atkin's discussion How to create an _immediate_ kill switch on PX4/APM?
"Funny how old posts sit for over a year and one person fires it up! And people just have to chime in! Don't just want to kill the power.  The SCR is a waste and you want to have to write software to program the ATtiny chip! Using the…"
Oct 6

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Please tell us a bit about your UAV interest
Flying photography enthusiast
Hometown:
natick, ma

Comment Wall (1 comment)

At 2:16pm on August 17, 2015, Manuel Ribeiro said…

Hi Paul, following the previous message, a more detailed explanation:

I have two Ublox M8N gps units and did this configuration (https://code.google.com/p/ardupirates/wiki/UbloxGPSTutorial) to get them working with arducopter autopilot software. However after changing their configuration to the one listed on that website, my quadcopter now behaves very badly when using the gps.
I've tried then to revert their configurations to default (using the ublox ucenter software) and their values changed to defaults indeed, however they still wont work fine ( I mean, I get good sat count and low hdop but the quadcopter trys to flyaway). But if I try with another  gps module (same model M8N) but one that I did not change configuration, the quadcopter works fine.
So something along the configuration messed the gps units and the 'revert to defaults' is not working 100% fine. Can you help me fix this two units ?

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