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1) Does it matter what "k" the potentiometer is for throttle control?
2) Isn't the trim on the S107 remote a potentiometer? Could this be used?
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Raptor said
I've just performed my first few mods on the S800G, and I think I'm starting to like it.So far I've done:
The Battery Charge mod (so I can use my balance charger on it)
The Throttle limiter (it works very well)
and finally the S807G mod. (essentially removing the "servo"
, and replacing it with the tail & Prop off a S107)
So overall it now fly's like a S107, but with more lift, and a 4th channel.
As you know from other posts I am really getting into the S800G ,so really stoked to see your mods already-great work Raptor.
"Fly like a butterfly sting like a Syma" http://syma107.com
So limiting the throttle does just that, right? Since we don't need it all, this is ok, and limiting it reduces how sensitive it is?
Are you going to convert to mode2? I ask because on another forum where I saw it done, two people did it differently and both claimed to have mode2.
I've just performed my first few mods on the S800G, and I think I'm starting to like it.
So far I've done:
The Battery Charge mod (so I can use my balance charger on it)
The Throttle limiter (it works very well)
and finally the S807G mod. (essentially removing the "servo", and replacing it with the tail & Prop off a S107)
So overall it now fly's like a S107, but with more lift, and a 4th channel. 
Raptor said
Is the Aileron (left/right tilt) control also a problem?
Not for me. It has a dead zone, but I think it's a good thing.
Is the Aileron (left/right tilt) control also a problem?
If so i believe that i could increase the precision of the stick, by removing some of the dead zone on the left and right of the stick in a similar way to the throttle (sorry I'm not quite sure how to explain this, but essentially it takes the middle 50% of the stick, and stretches it out)
The more advanced explanation (full left on modded = half left on Original)
| Stick movement | Original resistance | Modded resistance |
| Full left | 0.00Kohm | 1.25Kohm |
| Half left | 1.25Kohm | 1.875Kohm |
| Middle | 2.50Kohm | 2.50Kohm |
| Half right | 3.75Kohm | 3.125Kohm |
| Half right | 5.00Kohm | 3.75Kohm |
So far, from my calculations. This should be able to be accomplished with a 5Kohm resistor, and one 1.2kohm resistor.
If anyone is interested in testing this before I have a chance to do so, here is how it will probably be done.
(Image of S107 transmitter) (red=cut, blue=wire)
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Raptor your expertise is amazing,looking forward to more info on the S800G-BVC is correct about the throttle control on the 800G-Going to try the potentiometer mod idea-really great topic and advice,thanks guys.
"Fly like a butterfly sting like a Syma" http://syma107.com
Awesome. Looking forward to how well that works on the s800g. Does it limit overall speed on the 107? That's one thing I can't give up!
If you send me a photograph of the front and back of the transmitter's circuit, i think I can walk you through it.
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Edit: *facepalm* (sorry about the over complicated/incorrect explanation earlier, I was writing when I should have been sleeping)
All you should need to do, is use a 22k pot connected to the accelerator potentiometer on the board. (image is of a S107 transmitter, but should be similar to the S800G.
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Edit(2):
After performing the mod on my S107 transmitter, I can confirm that it is possible to limit the throttle.
This is a easy mod to perform, as it requires only one 22K Variable Resistor, connected with 2 wires.
There is no need to cut circuit traces, and can easily be removed with no damage to the transmitter if it is no longer required.
With this mod, i was able to limit the height that I could obtain with my S107.
That's all sorta greek to me. Well I know what cutting a trace is and what's going on (learning about converting to Mode 2), but would have to be told where to do it. Maybe I should wait til I have a second controller in case I screw it up? That's why I haven't converted to Mode 2. I sure do want to do both though.
Applying a cap to the maximum throttle should be quite a easy fix with 2 resistors, or a potentiometer.
These circuits would cap the top speed at about 60%.
This mod would require cutting the circuit trace from the central pin of the throttle potentiometer, and adding a 10k potentiometer/2 resistors in between.
Edit: Sorry I cant be more specific about how to connect this up to your transmitter, Ideally I need to see a photograph of the front and back of the transmitter to determine solder points, and which tracks to cut. (Google isn't returning any useful images, other than how to convert it Mode 2)
You can see what I am talking about a little here (start 2:15). He says 1/32" but I was thinking from the top of the knob.
Thanks!
You never give the S8000G full throttle. Not even close. 3/16" up and you are hovering and raising the throttle another 1/4" will quickly put you into the ceiling if you are not careful. I already lengthened the sticks on the remote for more control,
which helped, but basically, it seems like all the power you will ever need is about half throttle.
Yes that would work, but I would recommend this Potentiometer as it looks to be lighter http://www.radioshack.com/prod.....nSession=1
I haven't got my hands on a s800g yet, but I assume that it only has 1 gyroscope.
This mod will only work on a gyroscope controlled channel such as the steering, so it probably wont be able to modify the throttle.
However can you please describe how you mean touchy. Does it react too fast to your control, or is it overpowered. (if it is either one, it can be fixed)
p.s. I started this thread for any mods, on any helicopter, so the s800g isn't a problem. It is also meant to be a place for people to request,improve, and upload their own mods.
Raptor said
The GYRO mod works.
The Gyroscope mod: This advanced mod allow the R5 board to be able to turn a LOT faster than normal (or the R3, and still be perfectly stable).
By using something known as a voltage divider,we can reduce the sensitivity of the output on the gyroscope.
Using a 10k potentiometer, I am able to easily adjust the turning speed/sensitivity from 100% all of the way to 0%
However this mod requires very fine hand movement to solder onto the there is very little area to solder to on the board (~1mm x ~2mm), so may be very difficult to accomplish.
Would this work on the throttle from the remote? The reason I ask is because the new S800G has an extremely touchy throttle, and it would be great if this could reduce that. I don't want to change this into a S800G issue. Just curious. Thanks!
Raptor said
Thanks,A potentiometer is a type of Voltage/Potential divider, as it produces a fraction of its input voltage. Wiki
Think this one would work?
http://www.radioshack.com/prod.....ntiometers
| Product Diameter | 0.55 inche |
Raptor said
All of the images I use are hosted on image shack, so in not sure why your firewall should be locking some but not others. If you are still having difficultly viewing them, try having a look through here
It's my dns server. I use it as a filter. I don't know why it would see only two, but I added imageshack so I can see them all now. Thanks!
Thanks,
A potentiometer is a type of Voltage/Potential divider, as it produces a fraction of its input voltage. Wiki
All of the images I use are hosted on image shack, so in not sure why your firewall should be locking some but not others. If you are still having difficultly viewing them, try having a look through here
Pretty sweet!
You mentioned a "voltage divider" and a "10k potentiometer". Two different things? I'm seeing the last two pics in your post but not the first two. Are the hosted on different sites? What site is the first two hosted on, so I can allow it through my filter?
Sorry about the slant to the video, and my hands being out of center of the shot.
This was taken with my first attempt at a head mounted video camera (essentially a camera, bolt, hard-hat and a stick. all duct taped together)
p.s. Do you prefer videos with or without music?
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