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Throttle Pedal Sensor

Overview

The throttle pedal sensor uses a linear Hall effect sensor (typically SS49E or similar) that converts pedal position into an electrical signal for motor speed control.

Common Hall Sensor Specifications

SS49E Linear Hall-Effect Sensor

  • Manufacturer: Honeywell / Various
  • Type: Bipolar linear Hall effect sensor
  • Operating Voltage: 2.7V to 6.5V DC (typically 5V)
  • Current Consumption: ~6mA at 5V
  • Sensitivity: 1.4-1.8 mV/Gauss
  • Output Type: Ratiometric analog voltage
  • Null Output: VCC/2 (2.5V at 5V supply with no magnetic field)
  • Output Range:
  • ~0.86V with north pole magnetic field
  • ~2.5V with no magnetic field
  • ~4.2V with south pole magnetic field
  • Operating Temperature: -40°C to +85°C (up to +150°C for some variants)
  • Package: TO-92 (3-pin)
  • Datasheet: Honeywell SS49E

Pedal Assembly Specifications

  • Output Range (configured):
  • 0-1V = 0% throttle (pedal released)
  • 4-5V = 100% throttle (pedal fully pressed)
  • Connector: 3-wire cable
  • Mechanical: Spring-return foot pedal with integrated magnet

Product Sources

Complete Pedal Assembly

Replacement Hall Sensors (SS49E)

Replacement Parts

SS49E sensors commonly fail and typically need replacement yearly in high-use applications. Having spare sensors available is recommended for maintenance.

Wiring

Cable Color Code

Cable Color Function Voltage
Red Vcc 5V
Yellow Ground GND
Teal (Green/Blue) Signal 0-5V

Signal Output

The sensor outputs a linear voltage proportional to pedal position: - Pedal released: 0V - Pedal fully pressed: 5V - The signal can be read by any ADC (Analog-to-Digital Converter) input

Installation Notes

  • Mount the pedal securely to prevent movement during operation
  • Ensure cable is properly routed to avoid interference with pedal movement
  • Protect connections from moisture and dirt
  • Test full range of motion before use

Interface Requirements

The throttle signal needs to be connected to: - An ADC-capable microcontroller pin (ESP32, Arduino, etc.) - Or directly to a motor controller with analog throttle input

For current kart configuration, this connects to the motor controller's throttle input.