"I have the same issue (at least seems to be the same) with APM2.5 and MediaTek GPS - GPS gets solid fix, gps test via CLI give G??G
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Brian McGrath
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Brian McGrath's Groups
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Learning to program the …
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Canada
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ArduCopter User Group
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Brian McGrath's Discussions
Digital Servos and APM2
Started this discussion. Last reply by R_Lefebvre Jul 20, 2012. 5 Replies 0 Likes
I have a Y6 running AC2.6 and am using a separate battery (2S/460mAh/25C) to power the APM2.I've heard that digital servos can draw a lot more current than similarly sized analog servos, but that…Continue
Power distribution with APM2
Started this discussion. Last reply by Brian McGrath Jul 6, 2012. 1 Reply 0 Likes
Are the gimbal ports (A10 and A11) powered from the inoutmrailmor the output rail? I'm asking because I want to power the APM2 with a separate battery on the input rail (through a 5v BEC) and I'm…Continue
Newbie Question about Radio Calibration, End Points, uSecs, etc.
Started this discussion. Last reply by Brian McGrath Jun 12, 2012. 3 Replies 0 Likes
Hi folks,I new in this hobby and I am confused about a few things (ok, many things). The Wiki says that to calibrate the ESC's, I should have my transmitter endpoints set to +100%/-100%. In the radio…Continue
APM2 GPS Not Working
Started this discussion. Last reply by Raymond Leach Oct 10, 2012. 2 Replies 0 Likes
Hi folks! I received my APM2 on Friday and I am having an issue with it. Since this board was bought for a new build rather than an existing copter, I have no way of testing it apart from using…Continue
Brian McGrath's Page
Latest Activity
Brian McGrath replied to Paul Williams's discussion Camera gimbal Roll"I found the same thing. Didn't matter where I set the TRIM value, nothing happened. I asked the same question in the main 2.7 release thread but didn't get an answer there.
I've modified the servo MIN and MAX values to…"
Brian McGrath replied to Marco Robustini's discussion ArduCopter 2.7 Released!"I was doing some tweaking of the camera setup this evening and came up with a question - does the CAM_R_TRIM do anything anymore? I can adjust the midpoint by tweaking the CAM_R_MIN and CAM_R_MAX values, but changing the actual midpoint value via…"
Brian McGrath commented on Andreas M. Antonopoulos's blog post ArduCopter 2.7 Released!"I'm flying a Scarab Y6/775kv/4s/1.78kgAUW and I had 2.7 out for the first time today. After cranking up the RATE_YAW_P (to 0.337 from the default of 0.130) I found that it flew very well. Even flew a small mission and was very impressed with…"
Brian McGrath commented on Andreas M. Antonopoulos's blog post ArduCopter 2.7 Released!"Thanks, @Randy! Back in business! When I set the MIN and MAX values to +-1500, the movements of the camera were very exagerated. It looks like I have to play with the CAM_*_ANGLE_MAX and MIN to get ensure that the servos keep the camera level as the…"
DeveloperR_Lefebvre replied to Brian McGrath's discussion Digital Servos and APM2
"That's not a bad idea. Use the BEC from one ESC to power the APM, and the BEC from a second ESC to power the servos, keeping them segregated. It will probably work, and it's a really good idea to keep servo loads off the APM…"
Milz replied to Brian McGrath's discussion Digital Servos and APM2"Hello
Why not use the BEC from the ESC ?
I had a brown out inflight with two servos for my gimbal connected.
So i connected the servo power to two of the 5V outs of the ESC
and the Signal line to the APM2.
Im a noob so is this no good idea ?
mfg…"
Brian McGrath replied to Brian McGrath's discussion Digital Servos and APM2"Thanks, guys! I appreciate the feedback. I've also received suggestions that I should be using a 3300uF electrolytic capacitor in the servo power supply to the servos to prevent sag when there is high demend. Have you tried this? Do you suggest…"
Rick Stewart replied to Brian McGrath's discussion Digital Servos and APM2"I have used digital servos connected to the apm2 via the camera gimbal tilt, and roll connections. They work quite well, you hear them fidget allot but that is the constant updating from the APM2. Unfortunately I cannot comment on…"
DeveloperR_Lefebvre replied to Brian McGrath's discussion Digital Servos and APM2
"I have run 4 digital servos on Outputs 1-4 with my heli, but it's becoming not recommended.
I would recommend building a little servo breakout board. Bring the PWM to the signal pin, and then power and ground for the servos that…"
Brian McGrath posted a discussionDigital Servos and APM2
I have a Y6 running AC2.6 and am using a separate battery (2S/460mAh/25C) to power the APM2.I've heard that digital servos can draw a lot more current than similarly sized analog servos, but that they provide much tighter control. Is there an issue using digital servos on ports AN10 and AN11 or any recommended limit to the size and power?Thanks!See More
Brian McGrath replied to Randy's discussion ArduCopter 2.6 released!"I've made it work with the APM2. Start here:
http://www.diydrones.com/profiles/blog/show?id=705844%3ABlogPost%3A750391
and then a check the code for 2.6 found that some of the analog ports are assigned to COPTER_LED
#define…"
Brian McGrath replied to Charles Winter's discussion Powering the Ardupilot Board"With JP1 OFF, using a separate battery/BEC for the input side, which rail are the camera pitch/roll servo ports (A10, A11) powered from?"
Brian McGrath replied to Brian McGrath's discussion Power distribution with APM2"Oops. Finger an proofreading problems. That should read "input rail or" not "inoutmrailmor"."
Brian McGrath posted a discussionPower distribution with APM2
Are the gimbal ports (A10 and A11) powered from the inoutmrailmor the output rail? I'm asking because I want to power the APM2 with a separate battery on the input rail (through a 5v BEC) and I'm worried that the camera servos might cause a brown-out/reset in flight. I'm using a 2S 460mah battery.
Brian McGrath commented on Chris Anderson's blog post APM 2 cases now available, also come free with new APM 2s"Thanks, Chris. I was actually thinking that the o-rings I'm using are introducing some unwanted low frequency harmonics. I will go with the foam tape and see if it improves the situation."
Profile Information
- About Me:
- Started with AR.Drone 1.0. Got tired of iPhone/iPad control and converted it to RC (MiruMod). Then built a Y6 and am now refining it as a camera platform.
Software developer by trade. Pilot (lapsed).
- Tell us a bit about your UAV interest
- Use as an aerial photography platform.
- Hometown:
- St. Catharines, ON
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Season Two of the Trust Time Trial (T3) Contest has now begun. The fourth round is an accuracy round for multicopters, which requires contestants to fly a cube. The deadline is April 14th.A list of all T3 contests is here.
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