"@ mohd fitri - so how did you manage it ? I have tried to rescue the 328 following the jDrones advice but no luck whatsoever.
jDrones promised to 'get back to me' last week but (guess what) I'm still waiting - no change there…"
Simon's Discussions
Sudden APM.1 failure - help !
Started this discussion. Last reply by Simon Jan 23, 2012. 3 Replies 0 Likes
The latest IMU (for now)
Started this discussion. Last reply by Curt Olson Aug 24, 2010. 3 Replies 0 Likes
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Simon commented on Jani Hirvinen's blog post jDrones News: jD-IOBoard v1.0"@ mohd fitri - I wish you luck, I , with many others, have been trying to get an answer from jDrones on this issue, for nearly 3 months in my case.
I too have tried to burn the bootloader via AVR Studio and also by following the offered tips re…"
Simon replied to James's discussion open source brush less gimbal controller sets"James - yes I would like to place an order for one of these. Payment was to be via PayPal, is this still correct. I have placed a 'friend' reques so that you can send me further details re. confirming order. Thanks."
Simon replied to Alexander Casassovici's discussion Stylish quadcopter frame design"@ Jim Powell – what does your printed part weigh ? Assuming that it has quite a thin section, I’d be interested to hear whether you think that it is going to have sufficient strength to be really useful . The Dimension 1200es…"
Simon commented on LTMNO's blog post 6 Position Mode Selection for APM with LED Feedback"@LTMNO – this could be a long post !
Yes, the Tx is MODE 2. Because of that I wanted the mode switch to be RH accessible. I prefer to keep the throttle under control at all times.
No, it’s not the standard P2 POT, it is a 6-position…"
Simon commented on LTMNO's blog post 6 Position Mode Selection for APM with LED Feedback"Hi LTMNO - I had problems with the video link, sorry about that. I've uploaded it to the 'videos' section on the left hand sidebar.
Yes, I thought I'd seen your posts on the er9x forums - it took some time to understand the…"
Simon commented on LTMNO's blog post 6 Position Mode Selection for APM with LED Feedback"The problem with simple LED feedback is that you still have to take your eyes off the quad/plane to choose a mode. Also, what happens if you decide to use a different selection of modes - switch re-labelling ?
Here's my solution.
The model and…"
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Simon's Blog
Gyros for ArduPilot
Posted on January 15, 2009 at 6:53am 7 Comments 0 Likes
Hi,
I understand the issues about using simple rate gyros with an autopilot - i.e. you can't unless teamed with accelerometers etc - but could one use a head-lock gyro for stabilisation via aileron control ?
Max flight time would be about 10 - 15 mins.
Simon
I understand the issues about using simple rate gyros with an autopilot - i.e. you can't unless teamed with accelerometers etc - but could one use a head-lock gyro for stabilisation via aileron control ?
Max flight time would be about 10 - 15 mins.
Simon
Comment Wall (3 comments)
- At 11:58am on February 13, 2010,
Mark Whitehorn said… - What kind of problems were you seeing related to use of a 4.7uF cap for C21? The datasheet calls for a low ESR 4.7uF. My Razor 9DOF seems to be working OK on the bench, but perhaps I don't know what problems to look for.
- At 4:47pm on February 13, 2010, Simon said…
- If it's working then you're fortunate ! With the HMC5843 board (same device/circuit) I found that the 10uF cap - as fitted by Sparkfun - did not allow any data to be collected. Nathan at SF said that this was known to be a recurrent problem but that they had had working units using either the 4.7 uF cap (as recommended by HP) or the 10 uF cap and were unable to replicate the problem.
If you look for info on the web about using the HMC5843 you will see that many other users have reported that these lower value caps just aren't suitable but that increasing it to e.g.100 uF gives a working result. Jordi has had the same problem and uses a 33uF cap in the DIYD mag board.
I was frankly surprised that SF chose to stick with the low value cap for the 9DOF board.
I wondered whether the cause of the problem might be the strength of the local field components but NW UK and Denver are pretty similar.
- At 10:16am on February 14, 2010, Mark Whitehorn said…
- Thanks for the info. After websurfing for a while, my guess is that the problems are due to high ESR (equivalent series resistance) which depends on both layout and capacitor type. I'd hope the engineers at Honeywell would specify a conservative datasheet value for the capacitance, and that only leaves ESR as a variable.
I'll post a comment if I run into any problems with my 9DOF board.
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