need help on a setup(radio tech)

[reod12x2]

hello guys i have

-one tq 2.4ghz 5 ch reciver
-one tq 2.4ghz 2ch transmitter(controler number one)
-one tq 2.4ghz 4ch transmitter(controler number two)
-one stampede

i have come into a project at a retirement home in my comunity but have run into a problem im going to explaine this as best as i can

aspect #1
what i need to do is let them drive the stampede but the catch is i would like controler two to have a override function. so the person driving the car has control as long as controler number two is in nutral(throttle/steering)

so when controler number two starts puting out a signal(moved from nutral steering or nutral throtle)
controler number two has full control of the car with out controler number one interfearing

(so if controler number one was on full throtle heading twords a wall i could move the throtle on the number two controler into breaking position and controler number one wouldent have control over throtle eny more
but they would still have control of the steering

and if controler number one was steering consistinantly in one direction i could use controler number two to steer for them. but controler number one would still have control over throtle only if throtle wasnt being controled by controler number two

and now how to shut controle number one off if need be for a emergencey or lva hit its mark

aspect #2

almost like the same as above. controler two still has the override control

i could use the 4ch transmitter(controler two) to turn on/off the throtle an steering and power to controler number one


thank you guys i hope you have the experience and the guidence to show me if this is possible or not

if you cant under stand the post say so and i will re right it for you guys thank you againg

[roberz00]

you basically are looking for a aviation trainer style/ mode. I dont think that possible in car r/c.

[Petertje60]

First thing is that you would need 2 receivers. Even if you have, it would be a hard nut to crack.

Least complex would be using the extra channel of the set with the most channels to be able to switch the controls to that one. Switching only the control that is activated (steering or throttle) on the master tx/rx set to that controller is also a factor that makes it more complex. Another thing is that the extra electronics that you need to get it done, would need to be quite fast to be able to make corrections.

A functional problem might be the conditions for the master set to take over. If you want neutral steering on the master set to correct either left or right steering on the slave set, you can only do that by switching the steering over to the master set.

More challenge is to find a way to control the ESC, because the receiver needs power from the ESC. The need to feed two receivers might be a good reason to feed the ESC with an external BEC.

LVC is not a problem, because the ESC takes care of that as a switch in between the motor and battery, which will not change.

I understand your wishes, but you will need a custom electric circuit which wont be available on the market. But you probably knew that already.

Good luck finding someone who can help. The purpose where you need it for is a nice one. My compliments for your efforts on that matter.

Edit: after reading the post about aviation, I remember seeing transmitters that can be used as a couple in the way you need them. They need to be connected with a cable. That might be a road to go.

[pavmentsurfer]

You could simply use an Aviation radio (stick radio).

Or, and I'm thinking pretty far into this.

You COULD get an LED on/off switch that is controlled by your radio (it allows you to use a 3rd or 4th channel to turn LED's on or off) and 2 servo Y harnesses. Install BOTH radios into the car with the Y harnesses splitting the signal from the ESC and Servo into BOTH RX's. Then use the LED on/off switch on channel 3 of the 4Ch radio and use it as an on/off switch for the 2CH ESC. So, both radios would control the car equally but if you hit channel 3 on the 4CH radio it would turn OFF the other RX leaving radio 1 as the only radio operating. Its complex and I have NO idea if it would work. What I do know is the if BOTH radio are running at the same time neither will be the dominant. They will both give equal control and I'm not sure what that would do to the ESC and servo if they were receiving dual signals (literally MIXED signals).

Worst case scenario is you could use the 2nd radio and the led on/off switch to simply turn the power to the ESC off if something bad happened. Like an emergency kill switch. Even if you couldn't control the truck with that radio, at least you could stop it if needed.

Another idea to consider, and again, I have no idea if this is MORE feasible or not, would be to use an Emaxx with a dual motor/dual servo setup. Run 2 Radios and 2 ESCs with one running one motor and servo, the other running the 2nd motor and servo. If you used a rustler style servo saver on the slave servo it would be weak enough to allow the master servo to over ride it slightly (though it COULD simply strip or burn out the slave servo, I don't know). Then, if you used a stronger motor on the master than the slave it could over ride as well. You could easily get away with dual XL5 ESC's and the 2 motors already in the emaxx... Then you could run each complete system off one of the 2 batteries in the truck.

Honestly, neither seems overly easy or in any way simple. But the Emaxx setup seems like it could work on some level.

[BaldyDaniels]

Very interesting dilemma indeed, and is also something that intrigues me a lot. Here's a couple ideas for ya:

This here is called a*GWS PC03 In-Flight Gyro Switch allows your gyro to be turned on or off with your transmitter. The cool part about this switch is that it*also works as a bypass or RC switch for any R/C item. Simply activate it to apply or remove signal for just about anything hooked to a receiver (Speed controller, servo, etc)

Therefore, you could use Y splitters to hook both receivers to the esc, but have this switch on the aux channel of your receiver and the other receiver that the guests are using would be routed through the switch. This way everything still runs off of the esc power, but any time you want you could kill power to the other receiver and take over control of the truck with no risk of mixed signals. This would require that you have a 3 channel receiver with the 3rd channel running this switch.*

Cool part about this switch is you could use It afterwards to control some led lights on your truck, but the best part about this switch is the $10.50 price tag.



Now there's no guarantee on how your esc will react to having two receivers linked to it and powered up at the same time, and I have no idea on how you could calibrate both controllers to the esc without overriding the settings of the other. There's a lot of testing that would need to be done and I'd think that you would come across a few glitches for sure.

I can however give you a very basic, but sure fire way to just simply cut all control to the truck via another remote, receiver, servo and toggle switch.

*What you would do is get a toggle switch that you could activate via a servo and run that servo off of a spare receiver controlled by your remote. When the trigger on your remote is in neutral, the switch would be on. Then when you pull the trigger an arm attached to the servo could simply hit the toggle switch to the off position. The toggle switch would be hooked to the power lead from the esc to the other receiver. Simple but effective, and a plain old 12v toggle switch could be just taped to the side of a servo and the servo would have an arm that would be able to flip the switch. Something like this:

*

Your other options could be to run the truck in training mode, or take all them folks to the nearest and very wide open space you can find and run the truck there. good luck to ya, and good job on giving your time to these folks. Very honorable.

[reod12x2]

thank you guys for you replys on my dilemma


ya im looking forward to it

now for that wide open space there is a feild behind the building that it could be run on but i dont know if they will be able to go that far from the entrance