Using XBOX controller as RC Car transmitter - basic circuit help

Thread Starter

FunnyDuckFace

Joined Mar 19, 2019
2
I'll be upfront it's a bit of a hack but I am splicing the xbox controller outputs into the transmitter the issue I am having is that the voltage output is out so I figured I would use some resistors and a diode to solve this problem.

I need a minimum voltage of 1.78 this is neutral anything less and the brake is activated
I need a maximum of 2.69v this is full throttle

I think I have come up with a circuit to do the job but I have no idea what to ask/look for when purchasing the parts, ie what resistors a small circuit board and a diode.. also could I swap the two resistors for two potentiometers to allow for a bit of trim? again what would I ask for over the counter?

The potentiometer on the diagram is the xbox trigger.

Many thanks in advance.
 

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Thread Starter

FunnyDuckFace

Joined Mar 19, 2019
2
I've edited my post hopefully this will help

To summarise as per moderators request:

1.Is there a better way to achieve the circuit pictured below?

2.How do I find a resistor with a value of 109ohms and a resistor 8.8Momhs for a voltage of 3.29v from an electronic outlet?

3.What would I ask for if I wanted a potentiometer that covered the two values above?

4.What sort of diode do I need?

I used an online program called https://www.falstad.com/circuit/ to calculate the values. Here is a link to my particular circuit

https://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+0.23988752939670982+50+5+43 v+448+384+448+80+0+0+40+3.29+0+0+0.5 174+176+320+224+384+0+500+0.6485000000000001+Accelerator w+176+80+176+320+0 w+176+384+448+384+0 p+352+352+416+352+1+0 w+176+80+224+80+0 r+288+80+224+80+0+154 w+288+80+368+80+0 d+224+352+352+352+2+default w+352+352+352+224+0 w+368+80+352+112+0 r+352+112+352+176+0+10000000 r+352+176+352+224+0+4600000 w+448+80+368+80+0 38+6+0+100+400+Max\svoltage 38+11+0+1000+10000000+Min\svoltage 38+12+0+1000000+10000000+Min\sVolt\s2

The resistance in the pot is an unknown to me as this is the trigger within the xbox controller that I plan to use but it seems to go from 0 to 100% of the input feed.

The switch was just in the original - I've removed it as it is not necessary

Apologies for my lack of electronics understanding.

I am adjoining the xbox controller outputs to a radio controlled car transmitter.

I need a minimum voltage of 1.78v DC this is neutral anything less and the brake is activated on the RC car I need a maximum of 2.69v DC this is full throttle

I think I have come up a circuit to do the job but being non technical I need help creating my bill of materials

The potentiometer on the diagram is the xbox trigger.

Many thanks in advance.
 
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