SparkFun Load Sensor Combinator (Ver. 1.1)

The SparkFun Load Sensor Combinator (Ver. 1.1) is a breakout board designed to simplify connection and summing of multiple load cell sensors in weighing applications. It combines up to four half-bridge load cells into a full Wheatstone bridge, providing a unified analog output for accurate weight measurement.

This module is ideal for digital scale builds, robotic balance systems, industrial weighing, and educational experimentation. It interfaces easily with popular ADC modules such as the HX711 and microcontroller platforms for reliable signal acquisition.

KEY FEATURES

• Combines up to four load cells into one bridge
• Breakout board for easy wiring and connection
• Compatible with half-bridge and full-bridge configurations
• Improves weighing accuracy and stability
• Designed for use with ADC modules like HX711
• Compact PCB with labeled terminals
• Suitable for scales and weight measurement systems

SPECIFICATIONS

• Version - SparkFun Load Sensor Combinator Ver. 1.1
• Supported Bridge - Half and full Wheatstone bridge
• Load Cell Inputs - Up to four sensors
• Output Type - Analog bridge output
• Compatible ADC - HX711 and similar
• Operating Voltage - 2.7V to 5.5V DC typical
• PCB Size - Small breakout format
• Mounting Type - Standard screw terminal access
• Application - Weight and force measurement projects

INTERFACES

• E plus / E minus - External bridge excitation
• S plus / S minus - Bridge signal output
• L0 to L3 - Load cell connection terminals
• COM - Common ground reference
• Bridge Output - Combined analog output