[Ace_bridger]

Does anyone know what 'throttle' input the Open Revolt will accept?

Does it need a variable resistance? O-5Kohm?

Will it take a potentiometer? 0-5V for instance?

Will it take a Hall Effect input? 0-5V?

People talk frequently about throtlle pots and state 0-5K but do they really mean a variable resistor? A potentiometer is a 3 wire device (Grn, Vs and Vout).

A variable resistor is, normally, a 2 wire device.

I'd like to use Hall Effect as I have a free source at work. We design and supply sensors for race cars and aircraft.

Cheers,

Adam

[jackbauer]

Hi Adam the default input for the revolt is a 0-5k pot. However I have made modifications for use with a BMW hall effect pedal. As a result it can use any hall effect pedal in the 0-5v range.

[Ace_bridger]

Cheers Jack,

Is it a tricky mod? Hall effect is very mych my prefered route.

When you say 0-5K pot do you mean a 0-5K variable resistor?

[jackbauer]

A potentiometer will act as a variable resistor if you wire the wiper to either side terminal. its not difficult to use a hall sensor pedal. Just requires 2 resistor changes (one is linked out and the other removed) and different software in the micro. Have a look at the pics here:
http://ecomodder.com/forum/236391-post4775.html

and you will see R10 removed and the one with the scope ground linked out. Just a case of feeding the hall sensor with 5v and ground and feed the signal into the throttle input pin of the micro via the 4k7. Easier to do then to describe I have the modded firmware if you decide to go this route.

[Ace_bridger]

That's good news, I'll plan to do that.

We design and make F1 hall effect throttle sensors at work so I can bag a freebee and get the guys to make me an assembly mechanism to mount it on.

I wonder if people would be interested in buying these sorts of things?

Thanks again.

[Ace_bridger]

PS. I wouldn't use a pot as a variable resistor in automotive applications. They are fundamentally different in their build. The contact pressure is very low on a pot and whereas they do have multiple fingers you can still get debris under which sends the R way high which could have less than ideal effects!!! Suddenly your full throttle..aaggghhhhhhH!!!!!!!!

Also the contact resistance will vary so you won't get quite as good an output as you would with a variable resistor.

[jackbauer]

I think there would be a lot of interest in a throttle pedal with F1 spec! I actually used the old throttle body and tps from the bmw when starting out. Worked ok but didnt like the feel. Went with an e46 hall pedal assembly. Works great.

[Ace_bridger]

Once I've got a successful working design I'll put details on here...

[Ace_bridger]

Hi Jack,

I'm bench testing my controller and have the same software in the micro as is in yours. I'm getting high throttle lock-out fault.

Do you, by chance, know what threshhold voltages the software uses for zero throttle and full throttle?

I don't think it's 0-5V...something like 0.5-4.5V?

Any clues would greatly assist my bench tests. Paul is sending over a programmer but before it gets here I'd like to get it running on the bench by simulating your hall TPS output.

Cheers,

Adam

[jackbauer]

It should be programmable via rtd explorer. i think its something like t-fault-rc or something like that.