Search found 108 matches

by jbeebo
Thu Apr 18, 2013 10:44 am
Forum: openTx
Topic: rotary encoder with Open9X?
Replies: 54
Views: 4492

Re: rotary encoder with Open9X?

thanks for confirmation. So I can break into the LCD lines, add 3k9 resistors and have the encoder functional on a totally stock board w/ stock ATmega64! Me thinks nice activity for the wknd...
by jbeebo
Wed Apr 17, 2013 2:44 am
Forum: openTx
Topic: rotary encoder with Open9X?
Replies: 54
Views: 4492

Re: rotary encoder with Open9X?

Hi Bertrand, I'm finally digging myself out of a massive career related hole which has severely impacted the fun stuff. As I'm resurfacing, I see there is an issue with Open9X (RAM constraint). Was wondering, before I hack my 9X to install the rotary encoder - is there still encoder support in lates...
by jbeebo
Wed Apr 17, 2013 2:40 am
Forum: Other Electronic Projects
Topic: IDE recommendations
Replies: 3
Views: 2094

Re: IDE recommendations

many thanks Bertrand. Have you experienced random crashing of Eclipse as noted here?
by jbeebo
Mon Apr 08, 2013 11:28 pm
Forum: Other Electronic Projects
Topic: IDE recommendations
Replies: 3
Views: 2094

IDE recommendations

For lack of a better place to put this question...moderators if it needs to move please feel free. I'm preparing to jump back into embedded software coding after a VERY long hiatus. Last time I did this, I had to shine light on my micro to erase all the firmware sins I had just committed in assembly...
by jbeebo
Tue Mar 19, 2013 6:13 pm
Forum: Hardware Mods
Topic: alternative to Sparkfun USB breakout
Replies: 2
Views: 799

Re: alternative to Sparkfun USB breakout

oops, that's a miss! I included some links here for easy retrieval. This is the item from the original seller . Now comically it's listed for $103 each!!! Here's an ebay search for the same item from different sellers. Cheapest one today Mar19, 2013 is about $5. [EDIT] Here's an alternate board that...
by jbeebo
Tue Mar 19, 2013 5:47 pm
Forum: Hardware Mods
Topic: alternative to Sparkfun USB breakout
Replies: 2
Views: 799

alternative to Sparkfun USB breakout

I discovered an alternative to Sparkfun's USB breakout board for providing a mini-B USB receptacle inside the battery tray of the 9x. Why? Because I'm cheap and stubborn. Sparkfun board is like $10 by the time you pay shipping (assuming this was all you ordered from them), I knew there was a cheaper...
by jbeebo
Sun Mar 17, 2013 5:34 pm
Forum: General Information & Rules
Topic: Forum Name Change
Replies: 39
Views: 8778

Re: Forum Name Change

for all those that forgots their password - I recommend "LastPass". One of the best freeware apps I've ever installed.
by jbeebo
Tue Feb 19, 2013 6:15 pm
Forum: er9x
Topic: Er9x128
Replies: 225
Views: 27654

Re: Er9x128

yes, contrary to popular belief the risk of burning components is actually higher when using a lower tip temperature. It's because with a high tip temp, the solder melts almost instantly before the heat has a chance to flow into the component. With a low tip temperature you have to hold the tip ther...
by jbeebo
Wed Feb 13, 2013 6:13 am
Forum: openTx
Topic: rotary encoder with Open9X?
Replies: 54
Views: 4492

Re: rotary encoder with Open9X?

I'm running completely stock board without TeZ, and am a willing volunteer, but like Kaos will not be fast. I am very interested in this adaptation. Earliest I could realistically provide feedback is mid March, as I have parts on order and am currently on biz travel. Let me know if you'd like me to ...
by jbeebo
Tue Feb 12, 2013 4:47 am
Forum: ersky9x
Topic: Sky9x Rotary Encoder Option
Replies: 439
Views: 64277

Re: Sky9x Rotary Encoder Option

Iksbob wrote:I took about a quarter inch off mine with no ill effects
That sounds cool, do you have any pics? I don't have my backlight yet so am having a hard time visualizing how it's built...
by jbeebo
Sun Feb 10, 2013 5:06 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: Introduction to the openx vario/altimeter
Replies: 756
Views: 72487

Re: Introduction to the openx vario/altimeter

Rainer, looks good and seems pretty responsive. Quick changes in vertical velocity come thru very fast, the filter appears to be working well getting rid of the noise and honing into the steady state value. Did you reduce the deadband window in the 9X for the youtube demo or is that the level of sen...
by jbeebo
Sat Feb 09, 2013 12:21 am
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: openXvario development
Replies: 251
Views: 22379

Re: openxvario arduino based variometer/altimeter/hub for op

Rainer - nice! 8-) I'm glad I could help in some small way... Kalman filters are impressive beasts aren't they? I'm looking forward to reading how you've implemented that in code for such a small micro. It would be interesting to see time based traces of the moving average filter vs. Kalman output w...
by jbeebo
Fri Feb 08, 2013 11:01 pm
Forum: openTx
Topic: rotary encoder with Open9X?
Replies: 54
Views: 4492

Re: rotary encoder with Open9X?

Bertrand, I am a willing volunteer but I will be very slow. My encoder is on order and I'll be away from my radio on travels for a couple weeks. Probably won't be able to give feedback until mid or end of March.

haha, my soldering iron takes a long time to heat up I guess!
by jbeebo
Fri Feb 08, 2013 5:56 pm
Forum: openTx
Topic: rotary encoder with Open9X?
Replies: 54
Views: 4492

Re: rotary encoder with Open9X?

I heard jhsa is an expert at soldering processor pins, maybe he'll open a fab/hack shop? ;)

If it means having encoder and extra 3pos switch in Open9x - well... I'm warming up my soldering iron right now! :mrgreen:
by jbeebo
Fri Feb 08, 2013 5:22 pm
Forum: PROGRAMMERS
Topic: betemcu.cn programmer schematic variations
Replies: 16
Views: 20758

Re: betemcu.cn programmer schematic variations

@rperkins good post. I had to read it a couple times as there's lotsa good info and tips in there. Yes, I think the issue with these programmers is the interaction between 9X board and programmer board. Seems the voltage levels and edge rise/fall times are marginal thus it works fine out of box for ...
by jbeebo
Fri Feb 08, 2013 4:57 pm
Forum: The Pickled Gnu (The Pub)
Topic: Was I dumb for buying a 9X vs XR or not waiting for X9D?
Replies: 47
Views: 4921

Re: Was I dumb for buying a 9X vs XR or not waiting for X9D?

Cool! so was a programmer issue and in fact you did the 128 mod perfectly the first time anyways! Good job brother!
by jbeebo
Fri Feb 08, 2013 4:56 pm
Forum: er9x
Topic: Er9x128
Replies: 225
Views: 27654

Re: Er9x128

jhsa, I have a couple extra USBASP programmers ( read this ) - and as luck would have it I'm in Germany next week! Do you want me to bring one and put it in the post for you? I can give you one of my already modified ones with removed problematic 220ohm resistors. If you want it, PM me with your add...
by jbeebo
Fri Feb 08, 2013 4:38 pm
Forum: openTx
Topic: rotary encoder with Open9X?
Replies: 54
Views: 4492

Re: rotary encoder with Open9X?

yes, I suppose the encoder uses up 3 of LCD lines as inputs, so there are a few left over for some other fun stuff like your stick-switches, or perhaps another 3-way switch (hint, hint!) ;) LCD lines cannot be polled so frequently but enough for some inputs...
by jbeebo
Fri Feb 08, 2013 4:34 pm
Forum: The Pickled Gnu (The Pub)
Topic: Was I dumb for buying a 9X vs XR or not waiting for X9D?
Replies: 47
Views: 4921

Re: Was I dumb for buying a 9X vs XR or not waiting for X9D?

@jhsa - so you did get the 128 working now? I've been dying to ask you but knew you had a cold so was giving you a break...

@kaos - Yes, power to the ARMS! I love that Brent is stewing some new goodies in that thread you linked.
by jbeebo
Fri Feb 08, 2013 3:34 pm
Forum: openTx
Topic: rotary encoder with Open9X?
Replies: 54
Views: 4492

Re: rotary encoder with Open9X?

@bertrand, yes please enable it for stock board!
So you mean to say the FW already has capability to read the LCD lines as input? This is the functionality implemented in ER9X and I assume would need something identical in Open9X for encoder on stock board.
by jbeebo
Thu Feb 07, 2013 2:15 am
Forum: Helicoptor Programming
Topic: best practice rudder and gyro limit setup (EXI-450-SE)
Replies: 27
Views: 6899

Re: best practice rudder and gyro limit setup (EXI-450-SE)

Thanks for helping this noob along kaos! re: lazy susan, I had read that before so tried to give a lot of compliance by loosely attaching it with plenty of bubble wrap wrapped around skids. landing gear can move freely L/R/U/D about 3/4", yet heli could not get airborne. Heli spins up normally movin...
by jbeebo
Wed Feb 06, 2013 9:40 pm
Forum: Helicoptor Programming
Topic: best practice rudder and gyro limit setup (EXI-450-SE)
Replies: 27
Views: 6899

Re: best practice rudder and gyro limit setup (EXI-450-SE)

a quick update. Impatiently I flew the 450 in the too-small space in the back yard with old worn out parts as mentioned above. Tail was wagging all over the place. Some gusts of wind were more than my skills could handle and heli below into hanging branches of trees. bent main shaft, broken main bla...
by jbeebo
Wed Feb 06, 2013 9:26 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: openXvario development
Replies: 251
Views: 22379

Re: openxvario arduino based variometer/altimeter/hub for op

@RightRudder - good discussion. Agreed a pitot would be a better option and math can do the rest. Yes, a dsp chip is much better suited to Kalman filters and complex IIR, but a simple IIR will likely give better performance than moving box average with very little computational overhead. Caveat - th...
by jbeebo
Wed Feb 06, 2013 9:16 pm
Forum: The Pickled Gnu (The Pub)
Topic: Was I dumb for buying a 9X vs XR or not waiting for X9D?
Replies: 47
Views: 4921

Re: Was I dumb for buying a 9X vs XR or not waiting for X9D?

+1 I hope the 9X never dies. By now the tooling will have been paid for so they can continue making those parts with better profit. The 9X let the Jeanie out of the bottle. True dat. If (HA!) / when I need another radio, X9D or X12D looks like it. Hard to justify HiTec or JR or Futaba when stuff as ...
by jbeebo
Wed Feb 06, 2013 7:48 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: openXvario development
Replies: 251
Views: 22379

Re: openxvario arduino based variometer/altimeter/hub for op

@RightRudder - good post. There are more than 1 way to filter data, a simple boxed moving average (i.e. FIR filter) is very easy to implement in code. We are dealing with a micro of limited computing power but there are other options like a Kalman filter or other IIR filters which can produce some e...
by jbeebo
Thu Jan 31, 2013 10:58 pm
Forum: OpenXVario - an open source vario supported by the open source firmwares!!
Topic: Introduction to the openx vario/altimeter
Replies: 756
Views: 72487

Re: openxvario arduino based variometer/altimeter/hub for op

Super cool project. Rainer, Bertrand you guys have worked some really cool majik here! Porting those analog ports thru Arduino to RS232 to FrSky telemetry is slick, possibilities are endless! Rainer, nice job commenting the code, it is perfectly understandable. Rob, I like your idea for true vario b...
by jbeebo
Wed Jan 30, 2013 7:47 pm
Forum: ersky9x
Topic: Sky9x Rotary Encoder Option
Replies: 439
Views: 64277

Re: Sky9x Rotary Encoder Option

FYI, Mouser has the same part. Last I checked they had black in stock but were out of white...
http://www.mouser.com/Search/ProductDet ... N-CB222LFS
by jbeebo
Fri Jan 25, 2013 8:20 pm
Forum: Soldering, Hardware, Skills
Topic: Desoldering The Atmega Chip Using Chip Quik
Replies: 82
Views: 15294

Re: Desoldering The Atmega Chip Using Chip Quik

@mhotar - clever! Wondering; did you set up current controller on that bare copper wire? @jhsa - 250degC is probably too low to reach liquidus on the solder currently holding down your 128. You need to reach liquidus of both Sn-Bi (Chip Quick) solder and Sn-Pb (or SAC if lead free) so the Sn-Bi can ...
by jbeebo
Wed Jan 23, 2013 5:22 pm
Forum: Hardware Mods
Topic: RPM Sensor
Replies: 21
Views: 1646

Re: RPM Sensor

@Showmaster, Figure1 of this article from Digikey shows motor control timing chart for 3phase BLDC motor. They show a sensor motor design, but sensorless (typical RC motor) operates the same way. Only correction I would make to Figure1 is usually only one FET is PWM (either hi-side of low-side it do...
by jbeebo
Wed Jan 23, 2013 5:08 pm
Forum: FRSky Telemetry Mods
Topic: RPM sensor
Replies: 14
Views: 3733

Re: RPM sensor

michel49, i was thinking something similar. Why not pick up electrical pulses from one of the motor phases? Would eliminate magnets. Current sensor would probably work best. Might need a divide-by to calculate rotor speed based on motor magnetic pole arrangement and gear ratio, but sounds like MikeB...

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