• Wide Operating Voltage: 2.4V to 5V DC for versatile power options.
• Frequency Range: 20Hz to 20kHz, covering the entire human hearing range.
• Adjustable Gain: Gain range from 25x to 125x for flexible amplification control.
• Rail-to-Rail Output: DC bias at VCC/2 for consistent output signal.

• Supports working voltages of 6-30V and micro USB 5.0V power supply
• High-level trigger (3.0V-24V) for signal input
• Adjustable timing range from 0.1s to 999 minutes
• Can control equipment up to DC 30V 5A or AC 220V 5A

IR Transmitter Module:

• Supply Voltage: 5V
• Wavelength: 940nm

IR Receiver Module:

• High Sensitivity 1838 remote control receiver
• Working Voltage: 5V

• Wide Supply Voltage Range: 1.8V to 3.6V
• Low Power Consumption: 0.5µA at 1Hz
• I2C Interface for easy integration
• Max I2C Speed: 3.5MHz

• High-frequency clock signal generator with square wave output.
• Compatible with Arduino SCM & DIY kits.
• Wide logic voltage range of 3.3V to 5V.
• Designed with high-quality PCB material for durability.

• High-quality SIM808 module for GSM, GPRS, GPS, and Bluetooth communication
• Supports quad-band 850/900/1800/1900MHz for global compatibility
• Integrated GPS with A-GPS support for enhanced positioning
• AT command control for SMS, phone calls, GPRS, and GPS data

The MQ-5 Gas Sensor Module is designed to detect natural gas and methane with high accuracy. Operating at 5V, this sensor provides both TTL digital and analog outputs, with a detection concentration range of 300-10000ppm. Ideal for environmental monitoring and safety systems.

Key Features:

• Gas Detection: Natural gas/Methane
• Detection Concentration: 300-10000ppm
• Input Voltage: DC 5V
• Power Consumption: 150mA
• Digital Output (DO): TTL 0 and 1 (0.1 and 5V)
• Analog Output (AO): 0.1-0.3V, max 4V at high concentration
• Chip Used: AT89S52
• Crystal: 11.0592MHZ
• Baud Rate: 9600

• Compatible with ESP-12E development kit (NodeMCU).
• Extend output ports for ESP-12 including SPI, UART, GPIO, AI, and 3.3V power interface.
• Directly drive 2-way motors with ease.
• Power switch for convenient operation.

• Accurate Turbidity Measurement: Detects water clarity using light transmission
• Analog & Digital Output: Supports both analog (0~4.5V) and digital signal output
• Adjustable Sensitivity: On-board potentiometer for threshold tuning
• LED Indicators: Red for power, green for digital output status

Discover the 5V MP3 WMA Decoder Board Audio Module, perfect for integrating wireless Bluetooth, USB, and TF radio functionality into your projects in Bangladesh. Ideal for playing MP3 and WAV files, this module supports various audio formats and provides extensive control options.

Introducing the ISD1820 Audio Sound Recording Module with Speaker. This versatile module is perfect for various audio applications and features:

• Main chip: ISD1820
• Size: 38mm x 42.5mm
• Working voltage: DC 3-5V
• Easy-to-use 10-second voice recording and playback
• High-quality, natural voice restoration
• Can be used as a megaphone module
• Loop play, jog play, single play function
• Directly drives 8 ohm 0.5W small speakers

Package includes: 1x ISD1820 Audio Sound Recording Module with Speaker

• Brand new and high quality.
• L293D is a monolithic integrated, high voltage, high current, 4-channel driver.
• Can drive DC motors and power supplies of up to 36V with a maximum current of 600mA per channel.
• H-Bridge configuration allows voltage to be applied across a load in either direction, ideal for motors.

• Latching Relay Design: Maintains state (on/off) without continuous power.
• Touch Control: Operated by a simple touch for user-friendly control.
• High Current Capacity: Supports up to 10A, suitable for various applications.
• Low Power Consumption: Minimal energy usage due to latching functionality.

• Compact Design: Small and efficient module with a size of 8.6mm x 12.33mm.
• Wide Input Voltage Range: Accepts 4.2V to 10V input voltage.
• Stable 3.3V Output: Provides a steady 3.3V output with a current of 800mA.
• Efficient Power Conversion: Ideal for small projects requiring reliable step-down voltage regulation.

The MQ-7 Carbon Monoxide Gas Sensor Module is designed to detect CO gas with high accuracy. Operating at 5V DC, this sensor can detect concentrations ranging from 100 to 10000ppm. It provides both analog and TTL output signals, making it versatile for various applications.

Key Features:

• Main Chip: MQ-7 gas sensor
• Working Voltage: 5V DC
• Detection Range: 100 to 10000ppm
• TTL Output: Valid signal is low
• Analog Output: Provides variable voltage based on gas concentration