• Supports single (4.2V) and double (8.4V) lithium rechargeable batteries
• Adjustable charge current: 0.1A to 2A
• Multiple safety protections: Overcurrent, undervoltage, overtemperature, and reverse battery shutdown
• Charge status indicator: Red and green LED lights

• Wide Input Voltage Range: 5V to 80V
• Adjustable Output Voltage: 5V to 20V
• Minimum Voltage Drop: 1V
• Maximum Switch Current: 0.8A

• Can detect multiple gases: CO, NO2, C2H5OH, H2, NH3, and CH4
• High sensitivity with ppm detection range
• Compact design for easy integration in various applications
• Low power consumption

• LM358 Chip Onboard: Ensures reliable operational amplification.
• 100x Gain Circuit Design: Ideal for signal amplification applications.
• Adjustable Magnification: Features a 10K adjustable resistor for gain tuning.
• Power Indicator: Onboard LED for power status indication.

• 10-segment LED bar graph with multi-color display (red, yellow, green, blue)
• Ideal for battery level and power indication
• Compact design with standard 2.54mm pin pitch
• Efficient power usage with low forward current

• High Resolution: 240x320 resolution, 18-bit color (262,000 colors) for vibrant display.
• Compatible with 5V Logic: Works with 3.3V or 5V logic.
• Onboard LDO Regulator: Includes a 3.3V 300mA LDO regulator for stable power.
• LED Backlight: Equipped with 4 white LED backlights that are on by default, but can be controlled via a digital pin.

The PIC16F628 is a powerful and easy-to-program CMOS Flash-based 8-bit microcontroller from Microchip. It features the robust PIC® architecture, making it suitable for a wide range of applications, including automotive, industrial, appliances, and consumer electronics. This microcontroller is designed for low voltage programming and offers a variety of features that enhance its versatility and performance.

The AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller from Atmel, featuring 8K bytes of in-system programmable Flash memory. This microcontroller is designed for a wide range of applications, offering robust performance and flexibility. It includes several standard features that make it suitable for embedded control applications.

• Ultra-Low Standby Power Consumption: 90uA - 400uA
• Coverage Range: Up to 60 meters
• Built-In PCB Antenna
• Power Input: 3.6V - 6V DC (Cannot exceed 6V)

• LoRa Spread Spectrum modulation technology for long-range wireless communication
• Constant RF power output at +20dBm (100mW)
• High sensitivity: down to -148dBm
• Programmable bit rates up to 300kbps

• High-Precision Infrared Temperature Sensor with MLX90614ESF-BCC chip
• Non-Contact Temperature Measurement for accurate readings
• Standard I2C Communication Protocol for easy integration
• Wide Voltage Compatibility (3V - 5V) with internal low dropout regulator

• High Efficiency: Maximum conversion efficiency of 95% (5V input, 3.3V output at ~200mA).
• Wide Voltage Range: Input voltage range from 4.75V to 23V, with a selectable output voltage from 1.0V to 17V.
• High Surge and Continuous Current: 3A surge current and 1.8A continuous rated current.
• Stable Performance: 340kHz switching frequency and minimal 30mV no-load output ripple.

• 32-bit RGB full color LED module
• Utilizes WS2812B chips with built-in LED control
• 5050 package RGB full color highlight LEDs
• Simple control via a single IO port

• Dual Motor Drive: Supports two DC motors with up to 2A current per channel.
• Wide Voltage Range: 6.5V–12V (VIN Power Supply), 4.8V–35V (External Power).
• PWM Speed Control: Supports precise motor speed control.
• PLL Advanced Speed Control: Ensures smooth motor operation.

• 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.

• Motor Control Modes: Operates in CW, CCW, short-brake, and stop modes to control two DC motors.
• PWM Speed Control: Each motor’s speed is controlled via a PWM signal, up to a frequency of 100 kHz.
• Power Supply: VM up to 15V max for the motor, and VCC range of 2.7V-5.5V for logic supply.
• High Output Current: Rated output current of 1.2A (average), with a peak of 3.2A.