• Optical Heart-Rate Monitor
• Pulse Oximetry Solution
• Small and compact design
• Ideal for wearable devices

Specifications:

• Fixed Output Voltage: 3.3V ± 4%
• Input Voltage Range: 1.8V - 5V
• Continuous Output Current: Max 100mA
• Peak Output Current: Max 150mA (short duration)
• Operating Frequency: 1.2MHz
• Protection: Short-Circuit Protection
• No Load Input Current: 0.65mA
• Pin Pitch: 2.54mm (suitable for Breadboard and MCU Development Boards)
• Dimensions: 11mm x 7.62mm x 4.5mm (excluding pins)
• Weight: Approximately 0.5g

Package:

1x mini 2 in 1 DC DC Step-Down & Step-Up Converter 1.8V-5V to 3.3V Power Wifi ESP8266 HC-05 CE1101 LED Module

• Main Chip: ETA9640
• Synchronous Boost Converter for efficient power conversion
• Linear Battery Charger for stable and safe charging
• Charging Port: Type C for modern connectivity

• LCD Display for easy programming and time control
• Programmable Timer to automate power switching
• 24V Compatibility, ideal for various electrical applications
• Reliable Time Relay, suitable for street lamps, billboards, and automation systems

• Voltage Support: 3.3V and 5V
• Chipset: FT232RL
• Overcurrent Protection: 500mA self-reset fuse
• Communication Indicator: RXD/TXD transceiver indicator

Specifications:

• Mini DC Charging Fan Circuit Board
• 3 Level Speed Control & LED Indicator
• Ideal for Electrical Circuitry & Parts
• Best Choice To Replace Or Making a Mini Fan
• USB 5V Charging

Package:

1x Mini Rechargeable Fan Circuit Board with 3 Level Speed Control and Led Indicator

• Chipset: TI CC2530 chipset for reliable wireless communication.
• Voltage Range: DC 2.1V ~ 3.6V (recommended 3.3V for optimal performance).
• Transmission Distance: Up to 800 meters (with 3dBi antenna in open space).
• Antenna Interface: SMA interface for connecting antennas.

• 16-bit bidirectional I/O expansion for microcontrollers
• Supports I2C (MCP23017) up to 1.7 MHz and SPI (MCP23S17) up to 10 MHz
• Configurable interrupt system with INTA & INTB pins
• Three hardware address pins allow up to 8 devices on the same bus

• LCD Joystick Shield v2.0 with Nokia 5110 LCD screen
• SPI interface, maximizing I/O resource efficiency
• Includes a five-way joystick for human-computer interaction
• All analog and digital interfaces with pin leads for easy installation of other sensors/modules

• All GPIOs can be configured as external interrupt input and wake-up source
• One full-duplex UART with a maximum rate of 3 Mbps
• Supports I2C, DAC, PWM, and multiple interfaces
• Built-in 242 KB high-speed SRAM

Discover the Arduino Nano ATmega328p, a powerful microcontroller board designed for a variety of electronic projects in Bangladesh. Featuring the Atmel ATmega328 microcontroller, it operates at 5V with a recommended input voltage of 7-12V. With 14 digital I/O pins and 8 analog input pins, it offers versatile connectivity and performance for your DIY electronics.

• Wide Voltage Range: Runs from 2V to 5V, offering flexibility for different power sources.
• Automatic Reset: The latest version includes automatic reset for easy programming.
• Flat Backside: The backside is completely flat, providing a cleaner and more versatile design.

• Wide supply voltage range: 3V to 5V
• Chip: X9C103S
• Compact PCB board size: 2.7 * 1.3 cm
• 10K span potentiometer for precise adjustments

• Photosensitive Switch: Detects light levels for automatic switching.
• High Load Power: Supports AC 250V/10A and DC 30V/10A for various electrical applications.
• Compact Design: Easy to integrate into projects and systems.

• Double Panel PCB Design: Ensures durability and enhanced performance.
• Reliable Chip Control: Provides stable, anti-interference operation with minimal false triggering.
• Efficient Voltage Regulation: Offers stable power supply with proper heat dissipation for long-term usage.
• Anti-Reverse Protection: Prevents damage from accidental reverse power connection.

• Easy Operation: Simply plug in USB or micro USB to output 1.2V-24V adjustable voltage
• One-Key Off: Easily turn off the output with a single button
• Precise Adjustment: Multi-loop precise adjustable potentiometer for fine voltage control
• Power-Off Storage: Saves settings before power-off