SMS-Based Smart Notice Board
We are all familiar with how notice boards in schools, offices, colleges and railway platforms look like. But have you ever wondered how they work and how you can make such...
Make Your Own 15W Audio Amplifier
Here is a simple audio amplifier circuit based on TDA2050 IC. This amplifier can deliver an output power of around 15W for an 8-ohm load, 18W speaker with 18V DC power...
Make A Smart Presentation IR Pointer Using Arduino
Smart presentation pointers are readily available in the market but are expensive. Here is a simple, easy-to-build, inexpensive and infrared (IR)-based smart slide pointer using Arduino Leonardo.
Slide presentations using PowerPoint can...
Build Your Own Miniature VAW Meter
The circuit presented here can measure voltage (V), current (A) and wattage (W) on an OLED. It is actually voltmeter, ammeter and wattmeter circuits combined in one unit. It is a...
Automatic Power-Resumption Alarm
Most power-resumption alarm devices produce non-stop alarm when power resumes. To overcome this problem, here is an automatic Power-Resumption alarm circuit that sounds an alarm for a few seconds only after power...
World’s Top 30 Electrical Engineering Project Ideas
Engineers are always in search of projects, and finding meaningful projects makes that search worthwhile. Listed below are some electrical engineering project ideas for such engineers. A lot of them may...
Web-Based Device Controller With Arduino Board
Arduino board can also be used to control electrical devices and appliances over the Internet. Just by clicking a few buttons on a webpage, the devices can be operated from a...
Microcontroller-Based Morse Code Encoder
Morse code is a method of transmitting textual information as a series of on-off tones, lights or clicks that can be directly understood by a trained listener without using any special...
IoT-Based Smart Agriculture System
Most of us have a small garden, farmland or a plantation area. Our busy schedule, however, doesn’t allow us to maintain it well. But with the use of technology, we can...
Make This Solid-State Relay Driver for Microcontroller
Here is a simple solid-state relay (SSR) driver circuit using a transistor. An SSR is similar in operation to a traditional electromagnetic relay with movable/physical contacts. It employs an optical semiconductor,...
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Use MQTT Protocol In Smartphones And Raspberry Pi
The article demonstrates the use of Message Queuing Telemetry Transport (MQTT) protocol in smartphones and Raspberry Pi.
MQTT,...
Simulate Smartphone Screen Lock/Unlock Application
An Android phone allows itself to be locked/unlocked using a password, pattern on a grid of nine...
Creating Game Using Python Within Ten Minutes
Have you ever wondered how video games are created? It is not as complicated as you might...
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