Product Description
The XD-21 LM358 Gain Amplification Module is a precision-engineered operational amplifier (Op-Amp) board designed specifically for processing weak electrical signals. At its core is the highly reliable LM358 dual independent, high-gain, internally frequency-compensated op-amp IC. This module is an essential tool for engineers and hobbyists who need to boost low-amplitude signals from sensors like microphones, heart rate monitors, or thermocouples to a level that can be accurately read by a microcontroller's Analog-to-Digital Converter (ADC).
Equipped with an onboard 10k multi-turn potentiometer, the XD-21 allows for fine-tuned control over signal magnification. Users can adjust the gain up to a maximum of 100 times (100x), providing the flexibility to handle various input sensitivities. Whether you are dealing with millivolt-scale noise or low-power transducer outputs, this module provides the necessary "lift" to ensure signal integrity throughout your circuit's processing chain.
The module features a streamlined 4-pin interface, making it extremely easy to integrate into existing systems. The power indicator LED provides immediate visual confirmation that the board is receiving voltage, reducing troubleshooting time during the prototyping phase. Its compact, narrow-strip PCB design is optimized for space-saving, allowing it to be tucked away in tight enclosures or mounted directly alongside sensor modules.
Designed for stability, the LM358 IC ensures that the amplified output remains consistent across its rated operating voltage. This makes the XD-21 particularly effective for projects involving the ESP32, Arduino, or Raspberry Pi, where precise analog scaling is required to map sensor data to the full range of the MCU's input pins. The low power consumption of the LM358 also ensures that it won't drain your power source in portable applications.
In industrial and DIY robotics, this module serves as a bridge between the physical world and digital logic. From audio pre-amplification to signal conditioning for analog sensors that output very low voltages, the XD-21 provides a robust and cost-effective solution. At Robogears, we ensure these modules are built with high-quality components to minimize internal noise and distortion, providing you with a clean, amplified signal for your most sensitive measurements.
Key Features
High-gain LM358 Op-Amp IC for reliable signal processing.
Onboard 10k potentiometer for adjustable magnification up to 100x.
Wide operating voltage range from 5V to 12V DC.
Integrated power status LED for easy circuit monitoring.
Compact PCB footprint ideal for space-constrained projects.
Simple 4-pin interface for quick microcontroller integration.
