"Old School"

http://forum.freetronics.com/viewtopic.php?t=342 if you have an arduino just maybe you could use this .

Originally Posted by leadfeather

Are there enough ports for two inputs.

Yes. GP2 is free, and could be used to input another channel.

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.

Originally Posted by leadfeather

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.

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.

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

From Bruce's source code posted above.....

"16 bit macros (little-endian)"



Can't stop grinning at that one!

...and you know what the opposite of "little endian" is? That's right: "Big endian".

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.

Originally Posted by Bruce Abbott

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.

Originally Posted by jankraak

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).

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?

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

Originally Posted by Bruce Abbott

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?