Kart throttle position sensor with magnet

Other Hardware Sensors
1

Hello Everyone,

Im new to using Arduino, but veteran coder.
In a nutshell, Im trying to create my own kart data logger so I can collect the data from driver inputs.
The goal is to use this data for analysis and improve my driving.

I have bought a sensor that should measure the distance with a magnet.
This is the sensor tech sheet - AIM Kart Brake/Accelerator Pedal Position Sensor

Ans this is my code:

int led = 10;
int ledFade = 0;
char buffer[40];

template <typename T> Print& operator<<(Print& printer, T value)
{
  printer.print(value);
  return printer;
}

void setup() 
{
  Serial.begin(9600);
  pinMode(led, OUTPUT);
}

void loop() 
{
  int sensorValue = analogRead(A0);
  float voltage = sensorValue * (5.0 / 1024.0);

  ledFade = map(sensorValue, 0, 1023, 0, 255);

  analogWrite(led, ledFade);

  Serial << "LedFade:" << ledFade << " AnalogValue:" << sensorValue << " Voltage:" << voltage << '\n';

  delay(1);
}

My current issue is that, the output I get is always 5v, there is no variance in the signal?
Ant thoughts on what I might be doing wrong?

Thanks

2

Your code work well.
See at simulator.
I use a potentiometer to simulate your sensor.

The problem may or sensor or how it is connected.

How did you connect the sensor to the Arduino?

3

Please note that it is designed to connect to the company ECU, not any old Arduino. Do you have the 4.5 volt reference voltage connected? There is a lot missing from the data sheet you linked to!

4

Hello,

Many thanks for the reply, yes my code works with a potentiometer, I made sure I had that working before connecting the sensor.

I connect the sensor the same way I connect he potentiometer, this sensor uses an 719 connector, as per the technical sheet Ive shared the link here are my connections:

719 connector Pin1 Analog signal 0-5 V ----> Arduino A0 (where I read the inputs)
719 connector Pin2 Ground ----> Arduino Ground
719 connector Pin4 V reference (4.5V) ----> Arduino 5v voltage

I was trying to read the signal variance the same way I connected the potentiometer, but I don't know anything else about the sensor.

Is there another sensor or way I can measure a short distance in MM?
The distance could be something between 5MM - 40MM with steps/increments in MM or something similar so I can get as close as 1% increments between min and max throttle position, thats really what Im looking for, I just thought using this would be an easier way to achieve what I wanted.
But I don't have to use this sensor, I can use anything else that would serve the same purpose.

Im open to suggestions, as Im still new to this world or arduino, sensors and electronics in general.

Regards

5

Hello,

Many thanks for the reply, sorry I don't have any other specs about how the sensor works.

Please have a read in my previous post about what my goals are.

Essentially Im trying to find a way where I can measure pedal movement in a short distance, where I can get increments of 1% (or close enough) as the distance being somewhere between 5mm - 40mm

Regards

6

Look at this device to give you the throttle position.

7

Thank you @Paul_KD7HB will have a look

8

I noticed in the datasheet that the pinout shown is from the solder side of the connector, not the mating side.
Are you sure you have it connected right?

9

@jim-p mate you are absolutely right, the connectors on the spec sheet are for the binder, the sensor works now!

Appreciate the help and guidance here.

Next steps are to connect a bluetooth module and send the data to a phone, any recommendations on a module to use?

Regards

10

The HC- 05 is probably the most popular and it's cheap but basically it's a serial link between your Arduino and phone.

11

Will have a look, thank you

12

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