XL6009 is a high-performance 400KHz 4A switch currency step-up (BOOST) module. This module is coming with the 3rd generation high-frequency switch technology as the core chip, The performance is much higher than LM2577 Wide input voltage: 3V~32V;Optimum operating voltage range: 5~32V;Wide output voltage: 5V~35V With 4A high efficiency MOSFET switches, the efficiency of XL6009 can be up to 94%(LM2577current is 3A) With ultra high switch frequency 400KHz , even if small capacity filtering capacitors can achieve very good results, ripple is smaller (Compared to LM2577,its frequency is 50KHz) With 0.1uF high-frequency bypass capacitor, effectively filter out high-frequency noise

3Pcs MQ-135 MQ135 Air Quality Sensor Hazardous Gas Detection Module Gas sensor DC 5V For Arduino Sensors Double-sided panel design, with power supply indication and TTL signal output indication; With DO switching signal (TTL) output and AO analog signal output; The effective signal of TTL output is low level. (When the output low level signal light, can be directly connected to the microcontroller or relay module) Analog output voltage, the higher the concentration of the higher voltage. Input voltage: DC5V Power consumption (current): 150mA

A module includes 4 relays 5V with Terminal Blocks for both Input and Output Interface Each relay supports Normally Open and Normally Closed and Optocoupler Isolation. Each relay supports High-level Trigger or Low-Level Trigger selectable by a jumper. Relay for Arduino, ESP32, ESP8266, Raspberry Pi, or any 5V or 3.3V microcontroller. Tutorials for Arduino is provided.

Function: A simple humidity sensor for detecting soil moisture. Output: High level output when soil is dry, low level otherwise. Application: Used to make automatic watering devices for easy plant garden management. Output Modes: Dual output mode with simple digital output and more accurate analog output. Features: Adjustable sensitivity (digital potentiometer adjusts digitally) and stable operation using LM393 comparator.

2.4GHz Dual Mode WiFi + Bluetooth Development Board Support LWIP protocol, Freertos SupportThree Modes: AP, STA, and AP+STA Ultra-Low power consumption, Compatible with Arduino IDE ESP32 is a safe, reliable, and scalable to a variety of applications.

ATmega328P Microcontroller: Powered by the reliable ATmega328P, running at 16 MHz with 32KB of flash memory, 2KB SRAM, and 1KB EEPROM, offering ample resources for a wide range of basic to advanced electronics projects. 14 Digital I/O Pins & 6 Analog Inputs: Features 14 digital I/O pins (6 of which support PWM output) and 6 analog inputs (10-bit resolution), providing flexible options for sensors, motors, and other external components. USB Connectivity for Easy Programming: The built-in USB port allows for direct programming and serial communication, enabling a simple connection to your computer for sketch uploading and debugging through the Arduino IDE. Compatible with Arduino IDE: Full compatibility with the Arduino IDE ensures easy access to a vast array of libraries, code examples, and community-driven projects, making the Uno a great choice for both beginners and experienced makers. Widely Used in Education & Prototyping: The Arduino Uno is a standard in educational environments, widely used for learning and teaching electronics and programming. It's perfect for prototyping, robotics, IoT projects, and more.

Compact and Powerful – The Arduino Nano [A000005] is a small yet powerful microcontroller based on the ATmega328P, making it perfect for projects with limited space. Its compact design allows for easy integration into embedded systems, wearables, and portable applications without compromising performance. Versatile I/O Options – Equipped with 14 digital I/O pins, 8 analog inputs, and PWM support, the Nano enables precise control of components such as sensors, motors, and LEDs. This versatility makes it ideal for robotics, automation, and interactive projects requiring multiple inputs and outputs. Easy USB Connectivity – The built-in mini-USB port allows quick and hassle-free programming, as well as power supply without additional components. It simplifies prototyping and development, making it easy to upload sketches, communicate with the board, and integrate with other devices. Arduino IDE Compatibility – Fully compatible with the Arduino IDE, the Nano supports a vast library of pre-written code, examples, and community projects. This makes it accessible for beginners while offering advanced users the flexibility to develop custom applications with ease. Ideal for Prototyping & IoT – Perfect for makers, students, and engineers, the Arduino Nano is widely used in IoT applications, robotics, and embedded systems. Its small size and powerful features make it a great choice for prototyping, experimentation, and building compact, high-performance devices.

The Mega is 100% compatible with Arduino IDE and most shields designed for the Arduino mega R3，RoHS Compliant The chip is Atmega+2560-16au and 16u2, same with the official version. Improved and expert version: 1. 0 pinout: added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board. In future, shields will be compatible both with the board that use the AVR, which operate with 5V and with the Due that operate with 3. 3V. The second one is a not connected pin, that is reserved for future purposes. Stronger RESET circuit. Use 5. 5 * 2. 1mm DC barrel jack (compatible with 5. 5 * 2. 5mm DC barrel jack) It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started.

The Raspberry Pi 3 Model B looks identical to the Pi 2 B at first glance. It is the same size and has much of the same components on board. So what is the difference? The new Pi 3 brings more processing power and on-board connectivity, saving you time with the development of your applications. Perfect for your Internet of Things (IoT) designs.

Raspberry Pi 4 Model B with 8GB RAM is the latest product in the popular Raspberry Pi range of computers. It offers ground-breaking increases in processor speed, multimedia performance, memory; and connectivity compared to the prior-generation Raspberry Pi 3 Model B+ while retaining backward compatibility and similar power consumption. For the end-user, Raspberry Pi 4 Model B provides desktop performance comparable to entry-level x86 PC systems.

Raspberry Pi 5 features the Broadcom BCM2712 quad-core Arm Cortex A76 processor @ 2.4GHz, making it up to three times faster than the previous generation. With RAM variants up to 8GB, this is the fastest, smoothest Raspberry Pi experience yet.