Wireless throttle?

[Storm]

Anyone know where one could get a single channel transmitter to use as a throttle instead of the servo tester commonly used by rc ebikers?

Exkate uses a high freq version for their boards http://www.exkate.com/

 

[GTA1]

Buy a cheap RC toy and cannibalize it.

 

[recumpence]

You can get a basic pistol grip transmitter and reciever for $60.

Matt

 

[Storm]

Where? I have found two channel pistol transmitters on ebay for around $30 which would work but they're a little large, the toy rc transmitter might be a viable hack. Would I have any problems getting it to work?

Found this UFO has single channel:

 

[recumpence]

You are pretty much stuck with two chanel pistol grip transmitters.

Futaba is a good brand. Tower Hobbies is a decent place to look.

Matt

 

[Anonymous]

.

 

[Storm]

Some things might be better left to wire.

Like solenoid operated brakes

 

[Lapwing]

Some things might be better left to wire.

I have been looking into this a little, and modern digital spread spectrum wireless comunications for robotics, is fairly widespread, and well developed in the industrial environment. Lots of automated warehousing and wireless forklifts etc. In fact Fatuba is a major industrial player.

I think hobby stuff does not have all the failsafes I would want to see but certainly the basics are probably achievable.

My Prius is throttle by wire with multiple fail-safes should something bad electrical happen. I frankly don't see a problem. The safety features are designed into the car's software controller. How is that different really from wireless?

Well a loss of signal for instance - not unlike a throttle harness becoming unplugged or shorted.

Loss of radio signal = throttle return to zero under software, control. Interferance is not really an issue that affects modern spread spectrum digital wireless controls. Lets say gross EM interference and throttle control is lost = throttle return to zero under software, control. I think the concept has merit.


http://www.futaba.com/products/irc/introduction/index.asp Quick search and .............
This model has a throttle failsafe....... others may too.
http://2.4gigahertz.com/systems/futk6900.html

 

[tostino]

Some things might be better left to wire.

Like solenoid operated brakes

I just read that, and started cracking up! I can't stop laughing

 

[JS Tyro]

Some cycle computers are wireless. That could give you a wireless Hall sensor - I've seen replacement parts sold without the computer itself - assuming it's a Hall and not a reed switch. If you could take the Hall sensor and mod it into the throttle (turny thing holding a magnet)... The trick would be finding a matching part for the receiver. Are these working on any known standard for wireless - Bluetooth, for example?

 

[paull]

Some cycle computers are wireless.

Yeah, at an intersection near my house, my wireless computer always reads 99MPH. Just imagine if it were driving the throttle

 

[GTA1]

Have you considered using an Engine Order Telegraph?

 

[Storm]

While searching I found this digital interface board for rc controllers but they refer to brushed motors, it has return to zero failsafes.

http://www.4qd.co.uk/accs/smr.html

I think a receiver is still required or am i mistaken?

 

[chet]

Golden Motor has been trying to develop a blue tooth throttle on their newest hub motor. They gave up and went back to hard wire.
I guess for safety reasons. A fail safe zero is not fun when you really need go.

 

[Storm]

Same thing if your wire breaks/unplugs when you need to go, wireless rarely drop out if it's a quality setup and the transmitters batteries have good charge, also the transmission distance is short on a bike. I will canabalise a pistol grip and retain the index finger action as a thumb throttle under the bars.

 

[Storm]

Have you considered using an Engine Order Telegraph?

Engine Order Telegraph? I wiki searched and found EOT useful for ships and subs.

 

[TylerDurden]

Not to dismiss the idea, but why wireless?

(The simplicity of mechanical actuation has so many benefits.)

Wireless could be great for a trailer... hitch-up and go.

 

[Miles]

The MIT "Green Wheel" hub motor uses a bluetooth throttle:
http://www.autobloggreen.com/2009/02/19/mit-greenwheel-simply-an-electric-bicycle-revolution/

 

[dragonfire]

some controllers seemingly need a 5000 ohm throttle, the following link offers a nice choice:
http://www.electricscooterparts.com/throttles.html

as for the bluetooth solution, if you can go without having i-phone apps coded for it in order to have a remote start on the electric vehicle i´d stay away from it, this few cables saved comes at the price of the power consumptioning of the transmitter and receiver that need to be subsequently wired anyways and the safety is just not given in case of interferences of the bazilion of bluetooth devices and users around.
Have a look into the technique and maybe foreclosure sales on the technique used in remote controlled shopping cart pushers, sniping a cheap one of such an auction gets you parts for more than just one new project ( steering, engine with transaxle tranny, engine, batteries, controller....).

If you want the remote control function mainly for a kind of "lock"and "keyless go" then i´d consider a simple RFID setup with receiver opening the circuit when you ar ein reach of the receiver ( like 1-2 meter most of the time - not only segways can have this), cheap to have and make and readily available.

 

[Storm]

Not to dismiss the idea, but why wireless?

I don't have the ability or equipment to build a nice throttle like recumpences and I don't like the idea of a non spring loaded pot, just looking for something small and adaptable to the bars.