Tag Archives: arduino

Arduino relay module interface

The new KEYES 5V Relay Module is perfectly made for Arduino application. It has three pins, the VCC, GND and Signal. It can act as switch if the circuit and the load circuit have different supply voltage. It is commonly use if the load circuit is AC. It is a switch used to connect isolated connection from the circuit using a circuit signal. It has red LED that turns on every time the coil is energized or the signal pin has a high input. Commonly used in automation control circuit, it is actually a small Current to control a large current operation “automatic switch.”

Arduino Connection with Relay Module

Arduino Relay Module Interface

For the DC part of the circuit:

Arduino digital pin 10 –> module pin S
Arduino GND –> module pin –
Arduino +5V –> module pin +

AC Part of the circuit:

On the AC side connect your feed to Common (middle contact) and use NO (Normally Open) to Lamp. It will get power when (S) is high.

Warning: Always be very careful when experimenting with AC, electrical shock can result in serious injures.

Relay module from bottom side is open when AC is connected do not touch the circuit.

Arduino Program for Relay module

This program will turn on and off the Lamp. Similar to Blink example. You can see module led also blinks.

ESP8266 Web Server with HTML Web Page

In this tutorial we are making ESP8266 web server with HTML web page. ESP8266 connects to WiFi Network and we get web page in our phone and PC which is connected to same WiFi network.

In previous tutorial we have seen how to make ESP8266 as Access point and web server.

A Web server is a program that uses HTTP (Hypertext Transfer Protocol) to serve the files that form Web pages to users, in response to their requests, which are forwarded by their computers’ HTTP clients. Continue reading ESP8266 Web Server with HTML Web Page

ESP8266 Web Server AP (Access Point)

In this tutorial we are making ESP8266 as Access point and using it to make it web server. We have seen how to connect to WiFi Router and make web server in previous post.

A Web server is a program that uses HTTP (Hypertext Transfer Protocol) to serve the files that form Web pages to users, in response to their requests, which are forwarded by their computers’ HTTP clients. Continue reading ESP8266 Web Server AP (Access Point)

ESP8266 Web Server

A Web server is a program that uses HTTP (Hypertext Transfer Protocol) to serve the files that form Web pages to users, in response to their requests, which are forwarded by their computers’ HTTP clients.
To implement web server on ESP, there are two ways to make your first web server first connect to your WiFi router or make ESP as access point. Continue reading ESP8266 Web Server

Touch Screen interfacing with Arduino

Resistive touch screen displays are composed of multiple layers that are separated by thin spaces. Pressure applied to the surface of the display by a finger or stylus causes the layers to touch, which completes electrical circuits and tells the device where the user is touching.

In this chapter we are focusing only on 4-wire resistive touch screen interfacing. Continue reading Touch Screen interfacing with Arduino