esp8266 with 4-channel relay

thingiverse

Case with Top for NodeMCU and Relay Module The NodeMCU is a popular microcontroller board based on the ESP8266 chip, which provides Wi-Fi capabilities. The relay module, on the other hand, is used to control high-voltage devices such as lights or motors. In this case, we want to create a circuit that allows us to control these devices using the NodeMCU. To do this, we will use a top hat rail and some basic electronics components. We will start by connecting the relay module to the NodeMCU's GPIO pins. This will allow us to send digital signals from the microcontroller to the relay, which in turn will activate or deactivate the high-voltage device. Next, we will connect the top hat rail to the NodeMCU's power pins. This will provide power to the microcontroller and the relay module. We will also connect some basic electronics components such as resistors and capacitors to filter out any noise on the power supply. Once everything is connected, we can write a simple program using the Arduino IDE to control the relay module. The program will read the state of a digital input pin and use that information to decide whether or not to activate the high-voltage device. With this setup, we have created a simple yet effective circuit for controlling high-voltage devices with the NodeMCU and relay module. This project demonstrates the versatility of the NodeMCU and its ability to interact with the physical world. NodeMCU Features: * Wi-Fi capabilities * Digital and analog input/output pins * Built-in voltage regulator * UART, SPI, and I2C interfaces Relay Module Features: * High-voltage switching capability * Digital input control * Low power consumption