SKU: SEN-00260
Brand: SparkFun, USA
Warranty: 3 Days
Model: N/A
৳ 3993.36 ৳ 4991.7
Category: Flex
The SparkFun OpenScale is a simple, open-source solution for measuring both weight and temperature. Designed for versatility and ease of use, it supports multiple load cell types and provides a user-friendly serial menu to configure calibration values, sample rates, time stamps, and units of precision.
Whether for hobbyist projects or industrial applications, OpenScale allows you to set up a reliable weighing system quickly. Connect a four-wire or five-wire load cell, plug into a USB port, open a terminal at 9,600 bps, and begin receiving mass readings instantly.
OpenScale is ideal for static load monitoring (e.g., beehive tracking) or applications requiring continuous measurement (e.g., conveyor belt systems). It can operate for months without user interaction once installed
Feature | Specification | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Operating Voltage | 5 V | |||||||||||||||||||||||||||||
Operating Current | 80–100 mA | |||||||||||||||||||||||||||||
Data Output Rates | 10 SPS or 80 SPS | |||||||||||||||||||||||||||||
Power Cycling | >500 ms | |||||||||||||||||||||||||||||
Temperature Sensors | Local (onboard) & External | |||||||||||||||||||||||||||||
Microcontroller | ATmega328P | |||||||||||||||||||||||||||||
ADC | HX711 24-bit ADC | |||||||||||||||||||||||||||||
USB Interface | FT231 with mini-USB | |||||||||||||||||||||||||||||
Baud Rate | 1,200 bps to 1,000,000 bps |
Why do readings drift over time with a static load?
Load cells can exhibit creep, meaning their output can gradually change when a weight remains on the scale for extended durations (30 minutes or more). This is expected behavior of strain-gauge load cells and not a fault in the OpenScale.SparkFun Learn
How is calibration performed on the OpenScale?
The OpenScale features an intuitive serial calibration function:
Why do I get large negative readings when there’s no load?
Because the OpenScale uses a 24-bit ADC (HX711), even tiny voltage differences between input lines can produce large raw values. This is normal. Use the TARE function to zero out that offset. Also, updating to firmware version v1.2 is recommended—it includes an improved calibration experience.
What does "No remote sensor found" mean in the serial output?
This message refers to the absence of an external temperature sensor. It’s informational and can be safely ignored if you're not using a remote temperature probe.
How do I enter configuration mode to calibrate or adjust settings?
Why does my scale reset the excitation voltage when no load cell is connected?
If the OpenScale doesn't detect a load cell, it will disable the excitation voltage (which normally powers the load cell). This is intentional behavior to minimize unnecessary power draw and protect the system when no sensor is attached.
How do I wire and begin using the OpenScale?
Note: This item is non-returnable. If this item arrives damaged or is not functioning properly, don't hesitate to get in touch with us to determine if further actions may be taken.
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৳ 3993.36 ৳ 4991.7
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