Jean-Marie Piednoir

Posted by Alex Calderhead on 17/11/2014 11:53:28: Any chance we could have a Galloping Ghost emulator using two servos? That would be something! I just tried the following, which is an extension for two servos of my earlier pulse propo magnetic actuator driver. Inputs: IAil 100 AIl CV1 IEle 100 Ele CV1 Mixer: CH1 100 L2 =: 100 Ail SHv CH2 100 L3 =: 100 Ele SHv CH5 99 L1   Slow(u=0.1,d=0.1) Curves: CV1 3pts Smooth   -100,-100 ; 0,+40 ; +100,+100 Logical Switches: L1 Timer 0.1 0.1 L2 a>b IAil CH5 L3 a>b IEle CH5 Note 1 : You can switch between the Galloping Ghost emulation and regular proportional control by flipping SH. Note 2 : This emulation is at a fixed pulse rate for both channels (3.3 per second) which is about as fast as the OpenTx firmware will allow.   Edited By Jean-Marie Piednoir on 17/11/2014 23:05:19 Edited By Jean-Marie Piednoir on 17/11/2014 23:28:19 Edited By Jean-Marie Piednoir on 17/11/2014 23:29:36

Phil, thanks for the compliment and the package which came in this afternoon.   Edited By Jean-Marie Piednoir on 04/11/2014 15:51:27

Resetting the single-channel throtte to idle (off) when selecting the single-channel mode should not be complicated. I have not the time now, but will give it a look tomorrow night.

Congratulations! i see you are getting the hang of it. L11 and L12 act as a divide by four counter; L13 decodes the (0,0) state to skip it. I had programmed both kick-up elevator and three position throttle on the third button press, so that either could be used. If both had to be used together, then throttle via quick-blip would be the best choice, leaving the three presses for kick-up elevator. I haven't managed to do that yet, sorry.

More elaborate programs are available for download: https://db.tt/nPm5iqep Please read the readme file for explanations.

More elaborate programs are available for download: https://db.tt/nPm5iqep Please read the readme file for explanations.

5- Pulse proportional for magnetic actuator, with RC switch on channel 1. ( for OpenTx v2.0.0 and above) I never dreamed this one would come about, but here it is, pretty crude and still somewhat experimental, pulse rate only about 3.3Hz. However, in flight it has proven to be perfectly practical and satisfactory. My Owen Kampen Whizard with Cox Baby Bee and Adams actuator seems to love it! A curve is necessary for the stick input to obviate gross non-linearities introduced by the various latencies in the system (processing time, PPM frame rate, etc...) MIXES CH1 L2 Weight(+100%) CH2 L1 Weight(+99%) Slow(u0,1:d0,1) LOGICAL SWITCHES L1 Timer 0.1 0.1 L2 a>b [I1]Ail CH2 INPUTS [I1] Weight(+100%) Source Ail Curve(CV1) CURVES CV1 3pts Smooth -100,-100 : 0,+40 : +100,+100   Edited By Jean-Marie Piednoir on 09/08/2014 16:39:05 Edited By Jean-Marie Piednoir on 09/08/2014 16:44:07

You are right (if you do activate the throttle on another channel), but mind that above are only basic examples. I'll have the more elaborate programs up for download in a day or two, they are too long to post here. Let me get them organised. Three or four position throttle with three presses is provided for in the compound escapement emulations, I haven't done the quick-blip. However, quick-blip is included in the full Beep Box. Edited By Jean-Marie Piednoir on 09/08/2014 16:38:03

4- Simple Compound escapement emulation via the trainer switch, one press for right, two for left on channel 1 and three for up elevator on channel 2, with optional simultaneous proportional rudder and elevator from the stick. CH1 MAX Weight(-100%) Switch(SHv) R MAX Weight(+100%) Switch(CS2(L2)) R MAX Weight(0%) Switch(CS6(L6)) Ail Weight(+100%) (option) CH2 MAX Weight(-100%) Switch(CS6(L6)) Ele Weight(+100%) (option) CH13 MAX Weight(+100%) Switch(CS3(L3)) Slow(u0:d0.5) CH14 CH14 Weight(+100%) Switch(CS3(L3)) R MAX Weight(+100%) Switch(CS4(L4)) CH15 MAX Weight(+100%) Switch(SHv) Slow(u0:d0.5) CH16 CH16 Weight(+100%) Switch(SHv) R MAX Weight(+100%) Switch(CS1(L1)) CS1 a<x     CH15     20     SHv CS2 a~x CH16 100 CS3 AND !CS1(!L1) !CS2(!L2) SHv CS4 a<x     CH13     20     CS3(L3) CS5 a~x CH14 100 CS6 AND !CS4(!L4) !CS5(!L5) CS3(L3)           Edited By Jean-Marie Piednoir on 09/08/2014 11:20:12 Edited By Jean-Marie Piednoir on 09/08/2014 11:21:34

First taste of programming in the "Radio Gear/FrSky" section. Enjoy! Edited By Jean-Marie Piednoir on 08/08/2014 23:52:17

OpenTx as in the FrSky Taranis transmitter is powerful enough that it can be programmed to emulate single channel operation of a servo equipped model, and, with the addition of an RC switch, drive a rubber escapement and even a pulse proportional magnetic actuator, all from a single transmitter, just by selecting the model memory. Other transmitters hosting Opentx, such as FlySky 9x can also be programmed for single-channel Example of the programming are given below: 1- Simple escapement (requires an RC switch on channel 1, operates from the trainer switch, cannot be simpler) CH1 SH Weight(+100%) 2- Basic Beeper (generates one pulse with right aileron stick, two pulses with left aileron, or manually from the trainer switch as above) CH1 CS3(L3) Weight(+100%) R MAX Weight(+100%) ) Switch(CS6(L6)) CH2 MAX Weight(+100%) Switch(CS5(L5)) Slow(u0,9:d0) CS1(L1) a<x CH2 20 CS2(L2) a<x CH2 40 CS3(L3) OR CS1(L1) !CS2(!L2) CS5(L5) CS4(L4) a>x Ail 40 CS5(L5) a<x Ail -40 CS6(L6) OR CS4(L4) SHv 3- 2P2N emulation (for servo equipped models, from the trainer switch with proportional still available from aileron stick - this one for OpenTx V2.0.0 or above) CH1 L1 Weight(+100%) Switch(SHv) AIl Weight(+100%) L1 Sticky SH^ SH^ More sophisticated programming has been developped, but for the moment, the above should give a useful taste of what is possible. Single-channel rules!

In fact, the advent of OpenTx and FrSky has brought back the same type of fun as when I built my first radio back in 1963. It is all in the challenge and thinking out of the box, plus truly finding out what these old models and their various means of moving the rudder can do with a reliable radio link, as well as exploring the seemingly endless features of these amazing new radios. PS. I did title an earlier paper on single-channel emulation "A giant step backwards"

They say that the new computer radios can do anything you can dream of. Well, I found that my FrSky Taranis could be programmed to do single-channel, be it just emulation with servo or actual escapement or magnetic actuator pulse proportional. It can emulate push-button operation of an existing proportional model via the trainer switch, while maintaining the proportional operation via the stick, should the need arise. Without any additionnal equipment the model can be flown as usual or bang-bang mode (one press for right, two presses for left), all by merely programming the transmitter. With the addition of an RC switch (as designed in the UK by Phil Green, or other RC switches as long as they respond fast enough - many commercial switches are heavily filtered and are too slow -), models equipped with a rubber escapement can be operated either via the trainer switch or by the aileron stick acting as a Beep Box, generating the pulses as required. Think of it as the digital receiver plus the RC switch being a modern reliable replacement for the original 27 MHz relayless receiver. If a suitable switcher is added to our relayless receiver replacement, then proportional pulse operation of a magnetic actuator equiped model is possible and has actually been successfully flown. The limit to single-channel emulation by the Taranis appears to be true Galloping Ghost, proportional pulse rate change having not been found possible. I have flown a Dave Platt Halftone and a Stu Richmond Buzz Bomb with rudder servo, a DeBolt mini-Champ with Elmic escapement and an Owen Kampen Whizard with Adams actuator, all controlled by the same Taranis transmitter. Other transmitters using the OpenTx firmware can be programmed to accomplish the same thing, for example the FlySky 9x. Details of the programming will be found on this forum in the "Radio Gear/FrSky" section. Single-channel rules!