• 3.2-inch TFT LCD screen with Ultra HD resolution
• Screen resolution: 480x320 pixels
• High-quality backlight with 6 white LEDs
• Wide power supply range (5V/3.3V)

• Low Power Consumption: Operates on a supply voltage of 2.4V-3.6V, typically 3.0V, and consumes only 0.12mA of current.
• Wide Measuring Range: Measures light intensity from 1lx to 65535lx.
• I2C Communication: Uses I2C bus for data transmission, making it easy to integrate with microcontrollers.
• High Accuracy: Offers ±20% accuracy in light measurements.

The AT89C2051 is a low-voltage, high-performance CMOS 8-bit microcontroller from Atmel, featuring 2KB of flash programmable and erasable read-only memory. This microcontroller is designed using high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set. It provides a highly flexible and cost-effective solution for many embedded control applications.

• Serial Baud Rate: Supports baud rates from 1200 to 460800bps.
• Working Frequency Band: Operates on 850/900/1800/1900 MHz.
• Control Mode: Uses AT commands (3GPP TS27.007).
• GPRS: Supports PPP connection and embedded TCP/IP protocol.

• Compact Design: Shell-in-one structure for enhanced durability
• High Voltage Output: Capable of stepping up voltage to DC 200-400KV
• Efficient Current Handling: Input 4A and output 0.5A
• Polar Discharge Distance: Approximately 1.5 cm, beyond which damage may occur

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

• Non-contact temperature measurement
• Wide target temperature range: -40°C ~ 115°C
• High resolution of 0.02°C
• Low power consumption with 3V to 5V operating voltage

• 2-digit 7-segment LED display with red illumination for clear visibility
• Common Anode (C.A.) configuration for ease of integration into electronic circuits
• Brightness of 1.0 mcd @ 10mA, offering good visibility even in low-light environments
• Right-hand side decimal point location, ideal for numerical displays and counters

• Adjustable delay time range from 10 seconds to 24 hours
• Power-on reset for automatic start
• Current output voltage ratio: 3V/300mA, 5V/200mA, 9V/100mA
• Can drive 3V/5V/12V relays, LEDs, and similar devices

• Wide Input Range: Input voltage from 4.5V to 28V.
• Adjustable Output: Output voltage range from 0.8V to 20V.
• High Efficiency: Conversion efficiency up to 96%.
• Compact Size: Small size of 22mm * 17mm, perfect for DIY projects.

• ARM Cortex-M0+ 32-bit CPU running at up to 48MHz
• 256KB Flash memory for program storage
• 32KB SRAM for data storage
• USB Type-C connectivity for easy interfacing and power

• Human infrared sensor for automatic control
• Adjustable 3 gear modes:
  1. Induction highlight + slightly bright
  2. Induction highlight + light off
  3. Light control
• Sensing distance: 2-5 meters (depending on ambient temperature)

• On-board ISD1820 chip for voice recording
• Built-in microphone for direct recording
• Records up to 10 seconds of audio
• Natural voice quality with reduced distortion

• Adjustable voltage step-up converter for 18650 Li-ion batteries
• Supports both charging and discharging functions
• Compact PCB module design
• Ideal for DIY power bank projects

• Supports Wi-Fi IEEE 802.11 b/g/n protocol with up to 150 Mbps data rate.
• Dual-band Wi-Fi with 20 MHz and 40 MHz bandwidth in the 2.4 GHz band.
• Bluetooth 5 support with Low Energy (LE) and Mesh functionality.
• Supports up to 4x Virtual Wi-Fi interfaces for flexible networking.

• Heating voltage: 5 ± 0.2V (AC direct current)
• Operating current: 5-10mA
• Detectable concentration range: PH0-14
• Test temperature range: 0-80 °C