thomas Butler
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  • Rockford, IL
  • United States
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quad crash because of corrupt PID value EEPROM...no CRC check of EEPROM/PID values ???!!!

Started this discussion. Last reply by thomas Butler Aug 31, 2013. 2 Replies

My quad crashes for some unexplicable reason.  The copter would bank right on takeoff; looking at the quad from the rear (viewed from the front this would be a bank to the left)  I hooked up Mission…Continue

 

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Latest Activity

thomas Butler commented on Graham Dyer's blog post Prop testing on a 'copter
"Perhaps compare them to the new APC multi-rotor 12x4.5 (MRP) props?!  The MR props are stiffer and have a beefier hub. There was lots of hype over the MR props, but they've been a disappointment on my machine.  Is…"
12 hours ago
thomas Butler commented on Cody O.'s blog post ATSM Approves New sUAS Operating Standards
"Not to be cynical, but this is one of the first steps by big money to create barriers to entry; a prime objective of the likes of Boeing, General Dynamics, Lockheed-Martine, wee little DJI, etc. One has to consider where the people are who are…"
Tuesday
thomas Butler replied to Gábor Zoltán's discussion Adding extra functions to MinimOSD
"Oh that's right! I forgot some people are using a separete telemetry link over 433mhz(EU) or 900mhz. I don't use a separate telemetry link, since the OSD carries all the real-time telemetry data I need for FPV, and logging contains…"
Tuesday
thomas Butler replied to Gábor Zoltán's discussion Adding extra functions to MinimOSD
"Wouldn't telemetry/video RSSI be redundant?  RX RSSI is important because a weak signal will cause loss of control.  You should do some field tests to determine at what point (RSSI) the signal becomes too weak to control the aircraft;…"
Tuesday
thomas Butler replied to Ganesh Ram's discussion Quadcopter Thrust and Current Calculation
"Heat generated by an ESC under no-load conditions depends on the type of FETs used. The older cheaper ESC will heat up under no load. It will also heat up since the FETs resistance in relation to current flow causes more dissipation of energy as…"
Monday
thomas Butler commented on Chase's blog post JVC getting into the UAV camera/gimbal market
"They screwed up their action cameras, so I'm not holding my breath. Another big player throwing in $$$ to capture the market. That's the way big companies work. That cannot innovate. All they can do is steal the R&D done by the little…"
Apr 9
thomas Butler commented on Thanh Nguyen's blog post Low cost version of APM2.5
"Crius All-In-One $48."
Apr 9
thomas Butler replied to Gábor Zoltán's discussion Adding extra functions to MinimOSD
"Here is a patch to get RSSI working on MegaPirateNG v3.0.1R4 (the last supported version before 3.1) with MinimOSD (it will most likely work on APM too since the code is a superset).  It uses A0 by default (originally the pin for sonar). I…"
Apr 7
thomas Butler replied to Gábor Zoltán's discussion Adding extra functions to MinimOSD
"I have to correct some erroneous info I posted on pin usage; it was from the top of my head and incorrect.   Here is what I have verified and is on my system: Crius v1, v1.1, & v2 AIO connections:   PPM sum input on AIO A8   S0…"
Apr 6
thomas Butler commented on Gisela & Joe Noci's blog post Antenna, Feedpoint matching, Baluns, Turnstiles and why Complex homegrown antenna mostly do not work...
"Additionally, your "science" is overidden by what's on the market; we buy what is the best that is available."
Apr 4
thomas Butler commented on Gisela & Joe Noci's blog post Antenna, Feedpoint matching, Baluns, Turnstiles and why Complex homegrown antenna mostly do not work...
"With all due respect, this is no place to post a treatise; in spite of the excellent information.  However, if you want to do your doctorate, please do it at school. You can tell how disfunctional the article is by the confusion generated…"
Apr 4
thomas Butler replied to Gábor Zoltán's discussion Adding extra functions to MinimOSD
"For version prior to 3.s, this was in the APM_config file for 2.x, but v3.x brought hardware abstraction to the software enabling all kinds of flight controller hardware to be used. In <your source…"
Apr 3
thomas Butler replied to Gábor Zoltán's discussion Adding extra functions to MinimOSD
"Quick note and then I got to quit getting side tracked on this. One could use the ISP pin 1 you mentioned when the Orange LRS RSSI mode is to 8khz PWM. The ISP pin is MISO port B3 interrupt pin on the Atmel2560 CPU. It could be programmed to…"
Apr 2
thomas Butler replied to Gábor Zoltán's discussion Adding extra functions to MinimOSD
"That's correct. The firmware just reads the 0 to 3.3v input and scales it from 0 to 100%. Note that I see  here  some people had to put a low pass filter on the signal (simple cap and resistor). I'd go back to R4 if I were…"
Apr 2
thomas Butler commented on Mark Harrison's blog post E-Waste Quadcopter Lifts Your Spirits While Keeping Costs Down
"I just got this going yesterday.  It's amazing how a few microprocessors can change the game! Leo and I worked on it for years...it only autogyros though; i.e., only goes down and can't go up."
Apr 2
thomas Butler replied to Gábor Zoltán's discussion Adding extra functions to MinimOSD
"This might be of some help... Think of minimOSD as merely a MavLink message processor and video overlayer.  The board has no interface to the flight control other than through MavLink messages.   The short answer is use A0 on Crius,…"
Apr 2

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About Me:
software engineer
Please tell us a bit about your UAV interest
aerial photography
Hometown:
rockford, illinois

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