Sam
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  • Lexington Park, MD
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Spektrum PWM Read Issue

Started Jan 28, 2013 0 Replies

All,    I am running a modified version of the v2.68 Arduplane flight code, and v2.3.13 of the ArduPPM code. The big changes are the addition of a 50 Hz data recording packet which is sent out in…Continue

APM 2.5 Analog Inputs

Started this discussion. Last reply by Jesus Feb 5. 5 Replies

I'm trying to add 2 analog sensors to my APM2.5 system, both are 5v potentiometers.This is the essential code that I have added to the system:static int read_alpha(void){  int alpha;  alpha =…Continue

SD card in place of dataflash

Started Jul 26, 2012 0 Replies

All,   Has anyone used an SD card instead of the 16mb dataflash device? I am trying to log extended periods of data and currently limited to under 20 minutes with the stock dataflash…Continue

APM2.0 Sensor Quality

Started this discussion. Last reply by Chris Anderson Jul 26, 2012. 3 Replies

Frankly, the hardware documentation for APM2.0 sucks. There isn't a single page that shows all the connections, what is active in the default configuration and how to modify the board to activate…Continue

 

Sam's Page

Latest Activity

Jesus replied to Sam's discussion APM 2.5 Analog Inputs
"I´m trying to exactly the same? Any suggestion?   Thanks! :-)"
Feb 5
Itay Guy replied to Sam's discussion APM 2.5 Analog Inputs
"Hi,  I am trying to do the same thing, is there any guide for using external analog device , with the HAL cover? Itay"
Sep 4, 2013
Sam replied to Charlie Fox's discussion SOLVED (I THINK) Spektrum DX8 Throttle Anomolies in the group ArduCopter User Group
"So my setup cannot be put into 11ms mode. Is anyone else having this issue with DSMX receivers? I dropped down to 4 PWM inputs and it may have helped the issue slightly but I'm still getting glitches in roll PWM values over 1600."
Jan 30, 2013
Sam replied to Charlie Fox's discussion SOLVED (I THINK) Spektrum DX8 Throttle Anomolies in the group ArduCopter User Group
"I think I am seeing the same issue with different Spektrum gear. It popped up when I connected the gear channel to the Ardupilot: http://diydrones.com/forum/topics/spektrum-pwm-read-issue"
Jan 29, 2013
Sam replied to Tissy's discussion Motors twitching in flight
"I am having a similar issue on Spektrum. Flashed to the v2.3.13 PPM encoder code and its still present. See here for the plots: http://diydrones.com/forum/topics/spektrum-pwm-read-issue"
Jan 28, 2013
Sam posted a discussion

Spektrum PWM Read Issue

All,    I am running a modified version of the v2.68 Arduplane flight code, and v2.3.13 of the ArduPPM code. The big changes are the addition of a 50 Hz data recording packet which is sent out in binary over UART2 to an offboard data link. I'm logging roughly 27 parameters in this loop.I am having an issue with the recording of the PWM signals. Namely, I am getting spikes in the data, similar to that discovered here:…See More
Jan 28, 2013
R. D. Starwalt replied to Sam's discussion APM 2.5 Analog Inputs
"Are you planning to add this functionality to an aircraft? If not, I am not certain that the programming of all the subsections of the APM may be compatible to your goal. True that it is an Arduino. More to the point is that it has been…"
Jan 14, 2013
Sam replied to Sam's discussion APM 2.5 Analog Inputs
"Doug, thank you for your assistance. That is exactly what I am trying to do, just log data with this particular configuration. I would do everything on-board but the dataflash space isn't sufficient. I found a few things, for starters the…"
Jan 14, 2013
R. D. Starwalt replied to Sam's discussion APM 2.5 Analog Inputs
"Ok I will bite. Where are you adding the sensor inputs to? Are you using the current and voltage inputs? Other pins? Is there a schematic of this added circuitry -- though it only sounds like you added potentiometers. I think we need…"
Jan 14, 2013
Sam posted a discussion

APM 2.5 Analog Inputs

I'm trying to add 2 analog sensors to my APM2.5 system, both are 5v potentiometers.This is the essential code that I have added to the system:static int read_alpha(void){  int alpha;  alpha = analogRead(7); //initially on 6, switch to 7  return alpha;}I am calling this at 10Hz inside the medium loop, although would prefer to read it at 50 Hz. Unfortunately it looks as if I am not reading data properly, something is going on with the hardware or software that I do not fully understand. Attached…See More
Jan 11, 2013
Sam replied to Andre K.'s discussion APM2 - fails to detect/use Micro-SD "no dataflash inserted"
"remove your dataflash card. Power up the APM2.0. Let it set for a few seconds. Disconnect the APM2.0 from the power source. Insert the dataflash card. Power up the APM2.0. It will re-format the card and should work properly after a few minutes. "
Aug 6, 2012
Sam posted a discussion

SD card in place of dataflash

All,   Has anyone used an SD card instead of the 16mb dataflash device? I am trying to log extended periods of data and currently limited to under 20 minutes with the stock dataflash card. Additionally, has anyone tried a larger dataflash card? Atmel makes a 32mb version of the chip on the stock card (http://www.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=at45db321d-mu), that…See More
Jul 26, 2012

3D Robotics
Chris Anderson replied to Sam's discussion APM2.0 Sensor Quality
"Sam, we'd love your help with the documentation. The wiki is run by a volunteers, not 3DR. (3DR only produces and sells the basic electronics--"atoms". All the "bits"--software, this site, the wiki, etc--are free and built…"
Jul 26, 2012
Sam replied to kcaldwel's discussion Pitch stabilization of an unstable airplane without the autopilot functions
"Jack,    I have not read through all your posts, but in this case we need to use AoA directly, the IMU data won't be sufficient. We also need a high baud rate, at least 20 Hz. Your thought of putting the accelerometer inside a vane…"
Jul 26, 2012
Sam replied to Sam's discussion APM2.0 Sensor Quality
"I would like to apologize to the Ardupilot community for my initial post, it was poorly worded and overly harsh. The more I dig through the code and understand the unit, the more I am impressed with the maturity of the system. I am eager to go…"
Jul 26, 2012
Steven G replied to Sam's discussion APM2.0 Sensor Quality
"Sam, I wish I could help but all I can do is totally agree with you. It would be very helpful if 3DR (hardware manufacturer) made some simple connection block diagrams and got the Wiki pages up to date..Some form of configuration management for the…"
Jul 23, 2012

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Please tell us a bit about your UAV interest
Design and build UAV's full time. Looking to use ArduPilot as a data recording device.

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