The LM358 Operational Amplifier Module is a versatile dual-channel op-amp board designed for signal conditioning, amplification, filtering, and comparison in analog electronics. Based on the popular LM358 IC, it can operate from a single power supply and handle input signals close to ground, making it ideal for sensor interfacing, audio pre-amplification, voltage comparison, and embedded analog processing in Arduino and IoT projects.
Core Module Specifications
• Amplifier Type: Dual operational amplifier
• IC Used: LM358
• Number of Channels: 2 (independent op-amps)
• Configuration Support: Amplifier, comparator, filter, buffer
Electrical & Interface
• Operating Voltage: 3 V – 32 V (single supply)
• Dual Supply Support: ±1.5 V to ±16 V
• Input Pins: IN+, IN− (per channel)
• Output Pins: OUT (per channel)
• Input Bias: Suitable for low-frequency analog signals
Performance Characteristics
• Stable operation with single-supply systems
• Input common-mode includes ground
• Low power consumption
• Suitable for DC and low-frequency AC signals
Physical Characteristics
• Module Type: PCB-mounted op-amp module
• IC Package: DIP / SMD (module dependent)
• Onboard Components: Resistors, capacitors for basic conditioning
• Compact and easy to integrate
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32 (3.3 V operation supported)
• Raspberry Pi (with ADC for output reading)
• Sensor modules and analog circuits
Key Advantages
• Dual op-amp in a single IC
• Works with low-voltage single supply
• Easy to configure for multiple analog tasks
• Widely used and well documented
Technical Insights
• Output swing does not reach full supply rails
• Best suited for low-frequency applications
• Gain set using external resistors
• Not suitable for high-speed or precision audio
Applications
• Sensor signal amplification
• Voltage comparator circuits
• Active filters
• Audio pre-amplifiers (basic)
• Analog signal conditioning
Pro Tip
• Keep gain moderate to avoid saturation
• Add decoupling capacitor near supply pins
• Match input impedance for accurate signals
• Avoid high-frequency signals beyond op-amp limits
Package Includes
• 1 × LM358 Operational Amplifier Module.