Electronic Weight Scale Shield For OLEDUINO-v2
This compact shield is based on the HX711 ADC, specifically designed to interface load cells and strain gauge sensors. It can be paired with the OLEDUINO-V2, enabling the creation of a miniature electronic weighing scale.
The HX711 load cell amplifier shield allows users to accurately measure data from load cells and strain gauges. At the core of this design is the HX711 chip—a precision 24-bit analog-to-digital converter (ADC) developed for weigh scale and industrial control applications. It provides a direct interface to bridge sensors, simplifying system design.
The device features an input multiplexer that selects between Channel A and Channel B differential inputs, feeding into a low-noise programmable gain amplifier (PGA). Channel A supports programmable gains of 128 or 64, corresponding to full-scale differential input voltages of ±20 mV or ±40 mV, respectively, when powered with a 5V analog supply (AVDD). Channel B offers a fixed gain of 32.
An integrated power supply regulator eliminates the need for an external analog regulator, while the on-chip oscillator removes the requirement for external clock components. Additionally, built-in power-on-reset circuitry simplifies digital interface initialization.
No internal register programming is required, as all control and communication with the HX711 are handled directly through the header connector, making the shield easy to use and integrate into projects.
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This compact shield is based on the HX711 ADC, specifically designed to interface load cells and strain gauge sensors. It can be paired with the OLEDUINO-V2, enabling the creation of a miniature electronic weighing scale.
The HX711 load cell amplifier shield allows users to accurately measure data from load cells and strain gauges. At the core of this design is the HX711 chip—a precision 24-bit analog-to-digital converter (ADC) developed for weigh scale and industrial control applications. It provides a direct interface to bridge sensors, simplifying system design.
The device features an input multiplexer that selects between Channel A and Channel B differential inputs, feeding into a low-noise programmable gain amplifier (PGA). Channel A supports programmable gains of 128 or 64, corresponding to full-scale differential input voltages of ±20 mV or ±40 mV, respectively, when powered with a 5V analog supply (AVDD). Channel B offers a fixed gain of 32.
An integrated power supply regulator eliminates the need for an external analog regulator, while the on-chip oscillator removes the requirement for external clock components. Additionally, built-in power-on-reset circuitry simplifies digital interface initialization.
No internal register programming is required, as all control and communication with the HX711 are handled directly through the header connector, making the shield easy to use and integrate into projects.
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