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Feb 10, 2013, 07:54 AM
I bail out, anywhere, anytime
Taurus Flyer's Avatar
"Old School"
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Feb 10, 2013, 08:13 AM
Registered User
http://forum.freetronics.com/viewtopic.php?t=342 if you have an arduino just maybe you could use this .
Feb 10, 2013, 02:54 PM
We want... Information!
Bruce Abbott's Avatar
Quote:
Originally Posted by leadfeather View Post
Are there enough ports for two inputs.
Yes. GP2 is free, and could be used to input another channel.

Quote:
How is the chip flashed?
With a PIC programmer.

I recommend Microchip's PICkit 3.

I have arranged the inputs and outputs so that the chip can be programmed in circuit. Vpp is connected to the servo input. Clock and Data are connected to the two servo outputs.
Feb 10, 2013, 03:35 PM
AndyKunz's Avatar
Quote:
Originally Posted by leadfeather View Post
Didn't work.
What changes did you make for the linkages to get the full deflection at the elevator? That is an essential part. Perhaps I didn't emphasize that enough, but it's up there.

Quote:
I used my Dx7. Mixed elevator to elevator, travel set at 150% both directions and expo at 100%.

The result. No extra travel from the mix. The radio seems to truncate the output at 150% max.
Of course, travel will ALWAYS be limited to 150%. That's the limit of what the receivers can provide to the servos.

Quote:
Net result, mixing elevator to elevator does not add any maximum servo travel and it reduces expo.
Exactly. Reduce expo for normal flight w/o changing handling (notice the max percentage < 150%). This gives you more-normal flying conditions. When the mix is disabled, you now have 150% range, which gives you the full +/-150% travel of the servo pulse.

Once you make the linkage changes, it will be apparent.

Andy
Feb 10, 2013, 04:53 PM
Dave the Rave
dmccormick001's Avatar
From Bruce's source code posted above.....

"16 bit macros (little-endian)"



Can't stop grinning at that one!
Feb 11, 2013, 01:37 PM
KK Tri Flyer
mattcro's Avatar
...and you know what the opposite of "little endian" is? That's right: "Big endian".
Feb 14, 2013, 11:51 AM
Registered User
Bruce, I follow this thread, because I need to control the stretching of 4 servo''s in my yacht, (I don''t want to contol it on my FC28-transmitter)
I don''t have to strech the signal, but control the endpoints of the servo signal.
I can build 4 of your PCB''s, but you tell here that its posible to have more inputs and outputs on this .
Is that possible and can you place that on the forum.

Quote:
Originally Posted by Bruce Abbott View Post
Yes. GP2 is free, and could be used to input another channel.

With a PIC programmer.

I recommend Microchip's PICkit 3.

I have arranged the inputs and outputs so that the chip can be programmed in circuit. Vpp is connected to the servo input. Clock and Data are connected to the two servo outputs.
Last edited by jankraak; Feb 14, 2013 at 11:56 AM.
Feb 14, 2013, 01:25 PM
We want... Information!
Bruce Abbott's Avatar
Quote:
Originally Posted by jankraak View Post
I can build 4 of your PCB''s, but you tell here that its posible to have more inputs and outputs on this .
Is that possible and can you place that on the forum.
I will work on it when I get some free time (just have a few other jobs to sort out first).

Quote:
I need to control the stretching of 4 servo''s in my yacht, (I don''t want to contol it on my FC28-transmitter)
I don''t have to strech the signal, but control the endpoints of the servo signal.
What exactly do you want it to do?
Feb 14, 2013, 02:09 PM
Registered User
Bruce,

i have 4 servo winches in my Yacht.
I want to control the max. and min. way af traveling.
This is possible by my transmitter, but its saver to do it in the ship itself, so the servo winches can travel to much if I choose a wrong ship in my transmitter.
and is het possible that it also have a failsve position of 1.5ms

Quote:
Originally Posted by Bruce Abbott View Post
I will work on it when I get some free time (just have a few other jobs to sort out first).

What exactly do you want it to do?
Last edited by jankraak; Feb 16, 2013 at 08:16 AM.
May 27, 2013, 08:11 AM
Registered User
elkdom's Avatar
Hi,
A long time watching posts on this forum.
I have some questions related to the practical implementation of an electronic device, how to command two linearly proportional analog servo, S3003 etc.
Enter one channel, output from two channel.

Would be something like the imagening of Bruce Abbot, who also salute him!!
Bruce, assemblies and electronic schematics how you imagined and you have posted, I realized and Iam very pleased.
I watched and ESC from your page on your site, and updates from here.
But back to what I said at the beginning ...
A functional schematic diagram with an inexpensive microprocessor eg: PIC12F675 or other, which can make setting the servo beginning and ending heads positions in the
-90 , 0 , +90 .
(Total= 0 -180)
Inspired by you post with the example that here:https://www.rcgroups.com/forums/show...3&postcount=13,
I sketched a schematic circuit diagram, that I think are functioning.
But, as I know very little programming, but want to learn, my scheme lacks something:
. asm,. hex and the necessary corrections if something is wrong in it.
I will please do them.
If you have time ...
In any case, I wish you all the best.
Regards,
Last edited by elkdom; May 28, 2013 at 01:11 PM.
May 28, 2013, 04:53 AM
We want... Information!
Bruce Abbott's Avatar
Quote:
Originally Posted by elkdom View Post
I sketched a schematic circuit diagram, that I think are functioning.
There is small mistake in your circuit - pins 3 and 5 should be connected only to the pot wipers, not to ground.

Quote:
But, as I know very little programming, but want to learn, my scheme lacks something:
. asm,. hex
I am working on some code to produce two outputs with individual ATV adjustment. When I get the bugs out of it I will post the asm and hex files here.

Meanwhile, I suggest that you download and install MPLAB8.91, then you can learn how to write your own programs.
May 28, 2013, 12:19 PM
Registered User
elkdom's Avatar
Good evening,
Yes, it is!
I made a childish mistake.I posted once, and I was wrong.
I corrected the mistake with the correct electronic scheme.Thank you, for your prompt reaponse and corrections made.
I look forward to your posts, so that I can respond to queries that I have, and I follow your advice.I know that nothing is done without working.
I want to learn and through this hobby maybe I'll be able to answer the question that bothers me.
Began looking for a way to guide me on this journey of learning programming.
At the time had to learn programming, I did not, and now, I'm sorry.
I hope to correct this shortcoming with a little help ...
It's like Joe Cocker song! (Woodstock 1969)
I just need some guidelines and some tips provided by a person like you, with teaching spirit that you have.
I wish you good night, and tomorrow, one day as good.
Last edited by elkdom; May 28, 2013 at 01:48 PM.
May 29, 2013, 05:47 PM
We want... Information!
Bruce Abbott's Avatar
Quote:
Originally Posted by elkdom View Post
I corrected the mistake with the correct electronic scheme.
Looking good.

Here is the first draft of my code (took a little longer than I expected to swat the bugs!). It is set to give an ATV of 66% to 200%.
May 31, 2013, 04:23 PM
Registered User
elkdom's Avatar
Hello Bruce,
Honestly, I did not expect so soon to live with these problems, especially since you said that you have to work.
But as I guessed you do not belie...Nice of you!
Now I have no choice than to go to work and to discover the answer to questions that I had unanswered and that solving in the code you posted.
I refer to my level of understanding and if I do not have to understand something, I will ask.
I hope not to bore you...
Is a great solution for the needs of others dealing with robots and in many areas of functional scale models.
The adjustment range is more than enough with those percentages you've got.
Would remain other scheme, I refer to the adjusting speed servos
That when you have time and do not require too much!
But, for now I can to do and at what to work.
Thanks for all and only better,
Last edited by elkdom; May 31, 2013 at 04:40 PM.
Feb 17, 2017, 05:04 PM
God made Beer to make us happy
evostik's Avatar
Hi, I'm an avid follower of all of Bruce Abbott's work but I cannot find the code for the second atv2 drawing, that is the one with the three pots, the third being a speed control pot. My project is screaming for something like this, I have trawled the web for over a week and everything brings me back to this.
Last edited by evostik; Feb 17, 2017 at 05:12 PM.


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