The 5V 4-Channel Relay Module is ideal for controlling multiple devices with a single microcontroller. With a maximum output of DC 30V/10A and AC 250V/10A, it ensures reliable switching and robust performance for various projects.

• Wide Voltage Range: Supports a working voltage of 80 ~ 260VAC for various voltage applications.
• High Power Measurement: Can measure up to 100A current and 22000W power, making it ideal for high-power applications.
• Multiple Measurements: Measures Watt (power), Volt, Ampere (current), and Frequency for a complete understanding of the electrical system.
• Accurate: Provides a measurement accuracy of 1.0 for reliable readings.

The SIM900A GSM GPRS Board + Antenna for Arduino is a robust module that ensures reliable connectivity for your projects. With a comprehensive set of features, this board is perfect for various applications. Key specifications include:

• SIM900A GSM module
• TTL level communication (cannot be directly connected to 232 level)
• SIM900A reset (active low)
• Power options: DC 5V and DC 3.3V-4.5V input
• Onboard Resources: Serial port circuit with protection, SMA antenna interface, SIM card circuit, 4*3.5 fixture hole, SIM900A serial port output terminal
• Frequency: 900 / 1800 MHz
• Working voltage: 5V
• Dimensions: 5.6 cm x 4.9 cm x 2.8 cm
• Weight: 23 g

Specifications:

• Lens type: Standard M12
• Processor: NXP LPC4330, 204 MHz, dual-core
• Power Input : USB input (5V) or unregulated input (6V to 10V)
• Lens field-of-view: 80° horizontal, 40° vertical
• RAM: 264K bytes
• Flash: 2M bytes
• Length (mm): 38
• Width (mm):42
• Height (mm): 15.3
• Weight (g): 70

Package:

1x Pixy 2.1 Smart Vision Sensor-Object Tracking Camera

• Dual-Port Independent Output for simultaneous charging
• Supports Multiple Fast Charging Protocols:
  • QC2.0, QC3.0, MTK PE1.1/2.0, Apple, Samsung AFC, Huawei FCP, Spreadtrum SFCP
• Wide Input Voltage Range: DC 6V - 30V

• Accurate temperature and humidity sensing
• I2C and one-wire bus communication
• Wide temperature measurement range (-40°C to 125°C)
• Compact and easy to integrate with Arduino

• High sensitivity IR receiver
• Extremely sensitive to wavelengths between 760-1100nm
• Power supply indicator lamp
• Comparator output indicator lamp

• 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

• 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.

• Ideal for Prototyping: Perfect for building custom circuits, especially for Arduino projects.
• Single-Sided Design: Simplifies soldering and circuit design.
• Durable Construction: Made from high-quality material with a copper thickness of 1 oz.
• Customizable Design: Can be easily modified to fit specific project needs.

Monitor your heart rate with precision using the KY-039 Finger Probe Heartbeat Detection Sensor Module. Key features include:

• Working voltage: 5V
• Uses IR LED and optical transistor for pulsation detection
• Ideal for synthesized teaching experiments
• Compact dimensions: 25 x 22 x 17mm
• Lightweight: 2g

Perfect for integrating into your Arduino projects to measure heartbeat rates accurately.

• 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.

• High-sensitivity microphone for capturing subtle sound changes
• Compatible with Arduino and other microcontroller platforms
• Analog output with threshold level output flip for flexibility
• Equipped with a power indicator and comparator output light for easy monitoring

• Automatically controls temperature, activating when below or above the set value.
• Supports both high and low-temperature triggering modes.
• Directly drives the relay to control AC (220V) or DC (30V) devices.

• Input Voltage Range: DC 4.5V to 24V.
• Adjustable Output Voltage: From 0.8V to 17V with fixed voltages at 1.8V, 2.5V, 3.3V, 5V, 9V, and 12V.
• Output Current: Up to 3A (max), with a tested output of 1.5A at 12V input.
• High Efficiency: Up to 97.5%

• Chip: MPU-6050
• Power Supply: 3V-5V
• Gyroscope Range: +250, +500, +1000, +2000 °/s
• Acceleration Range: ±2, ±4, ±8, ±16 g