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The SparkFun Load Sensor Combinator is a bare PCB that combines four load sensors into a standard four-wire Wheatstone bridge configuration. BOB-13878
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The SparkFun Load Sensor Combinator is a bare PCB that combines four load sensors into a standard four-wire Wheatstone bridge configuration. If you open up an electronic bathroom scale, you’ll find a large rat’s nest of wires. The Load Sensor Combinator was created to combine the 12 wires found in a bathroom scale into the standard four-wire Wheatstone bridge configuration.
This version of the SparkFun Load Sensor Combinator features a few changes that you specifically asked for! We updated the silk on the breakout to read “C/+/-” instead of “R/W/B” and moved the temperature sensor connector away from the standoff hole.
You can either use four individual load sensors or simply purchase an off-the-shelf bathroom scale and hack the combinator into it rather than trying to design a base to properly mount four load sensors.
This board works great with our Load Cell Amplifier breakout board; the five pins on the edge of the combinator line up directly to the five pins on the amplifier.
If your amplifier and supporting electronics are more than a few inches away from the scale, an RJ45 footprint is provided. The four Wheatstone pins (E+/E-/S+/S-) as well as the shield pin are connected to twisted pairs within a standard cheap Ethernet cable. This allows the amplifier board to be placed many feet away from the scale itself.
The combinator board also includes a footprint for the DS18B20 one-wire temperature sensor. This allows the user to gather the temperature of the scale in case there is a large variance between the scale and the amplifier. These three pins are accessed through the RJ45 connection as well, allowing remote temperature readings to be gathered over one twisted pair Ethernet cable.
Module with a deflection sensor with two measuring probes. The board houses the ADS1015 converter, which is an ADC converter with an output in the form of an I2C interface. SparkFun SEN-14666
No product available!
Aluminum extensometer beam, allowing weight measurement up to 3 kilograms. It has four wires. It is used in kitchen scales and portable scales.
Force-Sensing Resistor - 0.5" Circle
No product available!
Aluminum extensometer beam, allowing weight measurement up to 100 kilograms. It has four wires. It is used in kitchen scales and portable scales, max 100 kg, 20x23x94, 21 cm cable, RoHS
Long, flexible, pressure sensor that can be used to implement very sensitive force detection. The sensor is durable and designed to detect static and dynamic pressure at high response speeds. DFRobot SEN0293
SEN-11207 - Flexiforce Pressure Sensor - 25lbs (1" area)
Deflection sensor 114 mm long. The sensor resistance changes with the bend angle. At the end, the sensor has a 2-pin connector with a pitch of 2.54 mm. SparkFun SEN-08606
Force-Sensing Resistor - 1.5" Square
Flexiforce Pressure Sensor A201 – 1lb, Tekscan, RoHS
This disc load cell (sometimes called a strain gauge) can translate up to a whopping 200kg of pressure (force) into an electrical signal. Each load cell is able to measure the electrical resistance that changes in response to, and proportional of, the strain (e.g. pressure or force) applied to the disc. SEN-13332
Simple-to-use, open source solution for measuring weight and temperature with the ability to read multiple types of load cells and offers a simple-to-use serial menu to configure calibration value, sample rate, time stamp and units of precision. SEN-13261
Scale module with aluminum tensometer beam, allowing weight measurement up to 2 kilograms. It has screw terminals. Can be used to make electronic scale. KAmodTENSOMETER2kg
No product available!
Round, flexible, pressure sensor that can be used to implement very sensitive force detection. The sensor is durable and designed to detect static and dynamic pressure at high response speeds. DFRobot SEN0295
No product available!
No product available!
The module allows you to attach a strain gauge (working in the Wheatstone bridge circuit) and convert the analog signal into its digital representation, available on the module output lines. The system processes the signal with a 24-bit resolution and can be powered by 2.7V - 5.5V. The module is especially recommended for constructing digital scales in combination with Arduino
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Flexible pressure sensor with dimensions of 400x15 mm. Designed to detect static and dynamic pressure at high reaction speed. DFRobot SEN0299
The SparkFun Load Sensor Combinator is a bare PCB that combines four load sensors into a standard four-wire Wheatstone bridge configuration. BOB-13878