Gender
Male
About
Location
Albuquerque, NM
About Me:
Flight control engineer for UAV manufacturer.
Activity Feed
"Thanks for posting the Eagle files. It's been a while since I've done any hardware design. I can see how the DI input going to the xBee gets switched between DIDO and DODI signals coming from JP2, but I don't understand how the DO output from the…"
"FWIW, the xBee Pro 60 milliwatt radios seem to have voltage level issue when used with the XtremeBee adaptors. I got mine to work after putting a 7.5K resistor in the tx and rx lines between the xBee adaptor and Oil Pan shield. I'm also going to…"
"Be interested in what you find. In the mean time, can I get a copy of the adaptor board schematic to see if I can work out a level shifting circuit to make what I have on hand work?"
"I've got the same problem, and know of another user who has it too. Two 60mW xBee Pro's on XtremeBee adaptors. Baud ratea set at 57600, master mode selected on adaptor boards. Hooked up to FTDI's and 2 laptops and they communicate just fine. …"
"BTW - What was the fix applied to the rev H board? Replacing the capacitor with a 1K resistor as shown below? Something else?
Still no good explanation for this behavior............."
Still no good explanation for this behavior............."
"I'm using some modified code, so it does not matter what position the slider switch is in. I'm positive the issue is the board is not being released from the reset state. If the reset state is released, it will connect. It is just more often than…"
"Haven't come across that one, will check it out, thanks."
"Is there a brand or a part number on the kite fittings, I've found the angular parts but can't find the joiner part or the parts used for the motor mounts.
Similarly, who makes/markets the 10 gram motors?
Thanks for publishing this, great work!…"
Similarly, who makes/markets the 10 gram motors?
Thanks for publishing this, great work!…"
"Carrying the weight high leads to a stable hover, but creates issues in high speed forward flight."
"Just got the connectors soldered to the APM. Successfully processing all 8 PWM inputs, reading and scaling rate gyro and accel data. Progress!
John"
John"
"Christophe,
When the magnetomter is initialized, it is run thru a self test as desribed in the HMC5843 datasheet. This should output a specific set of numbers. The difference between these readings and their theoretical value (715 the way I set up…"
When the magnetomter is initialized, it is run thru a self test as desribed in the HMC5843 datasheet. This should output a specific set of numbers. The difference between these readings and their theoretical value (715 the way I set up…"
"Here's my code. I changed the formatting somewhat so I could read it easier. The matrix multiply routine and matrix storage method has been changed too. This was to accomodate matrix mulitplys in various dimensions. This also forced changes in the…"
"Didn't even see that that "Upload Files" link on the bottom of the page, will upload the code when I get home this evening.
John"
John"
"Christphe,
I've implemented the HMC 5843 scale factor adjustment and bias adjusments to the Sparkfun Razor IMU code. Should port to the arduIMU fairly easily. I just need to figure out how to post the code.....
John"
I've implemented the HMC 5843 scale factor adjustment and bias adjusments to the Sparkfun Razor IMU code. Should port to the arduIMU fairly easily. I just need to figure out how to post the code.....
John"
"Chris,
Any advance info available on the gyros choosen, the interface between them and the 12 bit ADC, and the interface between the 12 bit ADC and the ArduPilot Mega board?"
Any advance info available on the gyros choosen, the interface between them and the 12 bit ADC, and the interface between the 12 bit ADC and the ArduPilot Mega board?"
"If the gyros and accels can handle the vibration, there is no reason it can't fly a heli with the proper control laws. As soon as I can my hands on the new shield, I'm going to put the unit on my Trex450 and see how the AHRS behaves."
