DIY KIT 29- USB Digital Amplifier Board DIY Kit Audio Decoding Module
This is a USB or computer powered amplifier with a built-in USB digital audio decoding feature. It comes with a single USB plug and there is no need of an external power supply and no external audio cable. It is a simple and convenient kit to build a basic amplifier. It uses a high-efficiency class…
Powering up 3 digit object counter with USB cable
Step 1: In any USB cable(for example, the one you use for charging your phone), there are 4 wires. Step 2: Use your multimeter to find out which two wires give +5V. One wire should be +5V and the other should be -VE (GND). Step 3: Connect the +5V wire to +ve point of screw terminal...
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Example 1- Using WTV020SD-16P music module with Arduino
This article is about playing music files using WTV020SD-16P and Arduino. This experiment is suitable for amateurs and beginners. WTV020-SD module is a voice rewritable content type of mass storage voice module, pluggable maximum capacity of 1 GB SD card memory. It can load WAV format files and AD4 formats files. WTV020-SD module  voice chip…
Light activated police siren using 555 timer and light dependent resistor(LDR)
Here’s a simple light activated police siren using light dependent resistor and NE555 timer. Before you make this project, I would recommend you to make the following projects. a. Light sensor and dark sensor I strongly recommend you to make a dark sensor and light sensor using LDR and understand clearly how it works. b….
How to test DYP-ME007 Ultrasonic range finder using NE555 and Multimeter
Test ultrasonic range finder DYP- ME007
Arduino project 60- Arduino based thermostat and relay
In this tutorial, we will build a thermostat to independently activate and deactivate any domestic device depending on the temperature. We will be able to display the temperature and the activation status of the device connected to the relay on the 16×2 LCD display. Moreover, on the sketch we can modify the temperature, detected by…
FTDI basic breakout board
Description: This is a basic breakout board for the FTDI FT232RL USB to serial IC. The pinout of this board matches the FTDI cable to work with official Arduino and cloned 5V Arduino boards. It can also be used for general serial applications. The major difference with this board is that it brings out the…
CD4029 up and down counter module for Arduino
This is a basic up and down counter module for Arduino enthusiasts CD4029 is a presettable binary/decade up and down counter chip. Scoreduino app has a feature to control the CD4029 based up and down counter module. You can connect the CD4029 counter module to Arduino and send up and down signals via Bluetooth. It…
Bluetooth Audio Receiver Board – RCA
This Bluetooth music receiver connects to the RCA input on your home audio system. You can then stream audio from your Bluetooth enabled cell phone or mp3 player to your home audio system.
Arduino project 57- Obstacle avoiding robot using Arduino
How many times have we wished to have a robot that goes around the house avoiding obstacles? Creating this project with Arduino Uno, an HC-SR04 module and two wheels will take us to be a child. The robot is able to avoid obstacles, thanks to the ultrasonic range finder sensor that senses obstacle coming on…
EasyEDA’s Gerber viewer for beginners and experts
Few months ago, we had published an article about EasyEDA and described about its features. We see EasyEDA as one stop solution for all the PCB design and manufacturing processes. Check out the previous article about EasyEDA. EasyEDA has been providing most of the services related to PCB/circuit design and manufacturing to its customers. The only thing…
Serial LCD do-it-yourself(DIY) kit
This is a simple serial lcd do-it-yourself (DIY) kit based on Arduino. I derived this kit from the open source eagle file available on sparkfun.com. Â The only difference is that I used low cost components to make it more affordable. It uses the libraries and examples published on the quickstart page of sparkfun.
Water Level Indicator
We can use the logic of making an automatic light detector to make a simple water level indicator.We just need to remove LDR from the circuit and put the wires into water, then it simply works as water level indicator. There is a specific resistance between the wires that are dipped into water and conduction of electricity through water gives biasing voltage to base of transistor.
The sensitivity can be adjusted using VR1. Put 470K variable resistance in VR1.
50V – 10A Bidirectional DC Motor Driver Using A3941 – Electronics-Lab
This tiny board designed to drive bidirectional DC brushed motor of large current. DC supply is up to 50V DC. A3941 gate driver IC and 4X N Channel Mosfet IRLR024 used as H-Bridge. The project can handle a load up to 10Amps. Screw terminals provided to connect load and load supply,…
Dark sensor using two transistors
This works same as the other dark detector circuit. When light is falling on LDR, its low resistance drives transistor Q1-BC547 into conduction. This keeps transistor Q2 cut-off due to low base bias. The D1-LED does not get power as long as ambient light falls on LDR. When the resistance of LDR becomes high in…
Experiments with 741- Operational amplifier
Description: This versatile 741 operational amplifier module can be used for making a dark detector using an LDR, a photo transistor and a photo diode. The amplifier has been configured in inverting mode. It compares the change in voltage at pin 2 with the reference voltage at pin 3 and gives output at pin 6…
RC module
Description: An RC circuit is used to introduce time delay in circuits. A combination of resistor and capacitor gives a time constant. The following circuit shows a basic RC circuit. In the figure C1(100uF) works as a storage capacitor. When you press the switch, the capacitor charges quickly and provides base current to the transistor…
Experiments with Amarino Nano 1.0
If you have come to this page from a search engine, please read this page first, you will eventually come back to this page again. The first page gives you the idea of Amarino Nano 1.0 and its features. Steps for experiments:Â Before you start the experiment, stack the Arduino Nano and Bluetooth modules on…