DIY Arduino Based Musical Fountain

In this project we make an Arduino based musical water fountain which can sprinkle water according to the music beats. A sound sensor is used to recognize the music and then a DC motor to work according to the signals received by the sound sensor.

This Arduino Water Fountain takes input from any external sound source such as mobile phone and laptop and then the sound is break down to different voltage ranges, then use the output to turn on various Relay. We first used a condenser mic based sound sensor module to perform on the sound source to split the sounds into different voltage ranges. Then the voltage will be fed to op-amp to compare sound level with a particular limit. The higher voltage range will correspond to a relay switch ON which comprises a musical water fountain operating to the beats and rhythms of the song. 

You can find the full DIY project here with required instructions along with circuits and programming.

DIY Raspberry Pi Based NAS Server

Raspberry Pi is the pocket sized computer having almost all the feature of a normal computer including USB port, LAN port, audio/video output, HDMI port etc. It also has inbuilt Bluetooth and Wi-Fi connectivity which makes it perfect candidate to build various online servers like Webserver, Media server, Print Server, Plex server etc. So here we will be creating another server using Raspberry Pi- File Server or NAS (Network Attached Storage), where you can plug any storage device with Raspberry Pi and access it using any computer connected on the same network.

Using this Raspberry Pi NAS server you can share and access the files and folders without actually connecting the storage device to your system.

In this tutorial, we will install Samba in preinstalled Raspbian OS, so you don’t have to loose the default Raspbian OS. Samba is a re-implementation of the SMB (Server Message Block) networking protocol which integrates Linux computers with MAC and Windows based systems. There is another protocol named CIFS (Common Internet File System) which is an implementation of the SMB protocol. Nowadays, CIFs or SMB is used interchangeably, but most people use the term SMB.

Check out the full DIY tutorial here

DIY Raspberry Pi Gaming Console using RetroPie

Raspberry Pi is an amazing credit-card sized computer most suited for IoT based applications and online servers like Print server, webserver, Media server. Many types of custom ROMs and custom operating systems are available for Raspberry Pi and you just need to burn the custom ROM on SD card and insert it in Raspberry Pi. Like Windows 10 and Android can be easily installed on Raspberry Pi.

RetroPie is a software library used to emulate retro video games on the Raspberry Pi. In this tutorial, we are going to install RetroPie on Raspberry Pi and transform it into a powerful retro-gaming system. RetroPie supports 52 different gaming systems that means you can play everything in one place. You can easily setup RetroPie on your Raspberry Pi by following this tutorial.

DIY IoT Based Biometric Attendance Project using Arduino

In this project we use IoT to make attendance system more useful and online accessible. Most of the attendance systems generally store the information over a micro SD card and have to be connected to software via a computer to access the information.


So here we use Arduino and an IoT platform called Thingsboard to build a biometric attendance system that scans for fingerprint and on successful identification of the person it will log the information to the cloud platform ThingsBoard by using the ESP8266 Wi-Fi module. This information can then be displayed in the dashboard of ThingsBoard making it available for the required authorities to view and analysis information over the internet without having any direct physical access to the hardware.

Interesting? Follow this Circuit Digest tutorial to make this biometric attendance system project.

Below is the demonstration video of the project:

Interfacing a Camera Module with Arduino Uno

In this DIY project a OV7670 camera module is interfaced with Arduino UNO to click and store images.




The OV7670 camera module works on 3.3V, so it becomes important to avoid Arduino which gives 5V output at their Output GPIO pins. The OV7670 is a FIFO camera. But in this tutorial, the picture or frames will be grabbed without FIFO.

Below are some of the pictures captured using the above shown hardware.



Check out the complete tutorial on below link:
https://circuitdigest.com/microcontroller-projects/how-to-use-ov7670-camera-module-with-arduino 

Digital Wall Clock using Atmega16 and DS3231 RTC

This is a DIY PCB project for a Digital wall clock, which is made using Atmega16 microcontroller and DS3231 RTC module.



In this Digital Clock Project, ten common anode 7-segment displays of 0.8-inch are used to display time and date. Here seven segment displays are used to show hour, minute, date, month and year. Our PCB design also has options to display seconds and temperature, which can be displayed by adding more display units.

You can watch the video below for more details of this AVR project.

For complete project, check out the link below: https://circuitdigest.com/microcontroller-projects/digital-wall-clock-on-pcb-using-avr-microcontroller-atmega16-and-rtc 

Using Google Firebase with ESP8266 NodeMCU

In this DIY project will be building a project where we’ll use a temperature & humidity sensor DHT11 and a NodeMCU ESP8266 Module to log the temperature and humidity in real time on Google’s Firebase database server.



The complete project is divided into two sections. First we start with assembling the hardware components and uploading firmware into it. And second, we will use Firebase to setup with NodeMCU to exchange real time data.

Find the complete project tutorial on circuit digest: https://circuitdigest.com/microcontroller-projects/sending-temperature-and-humidity-data-to-firebase-database-using-esp8266