Design Your Own Li-Fi Dongle And Speaker
Light Fidelity (Li-Fi) is a new paradigm in wireless communication. In this article, we describe the design of a Li-Fi dongle (transmitter) and speaker (receiver) for audio and music applications. The...
Microcontroller Based Solar Charger
As the sources of conventional energy deplete day by day, resorting to alternative sources of energy like solar and wind energy has become need of the hour. Solar-powered lighting systems are...
Smart Wireless Water Meter With Web DB IoT Projects (Hindi & English)
As water consumption and wastage increases day by day, water scarcity has become a growing concern around the globe. While some irresponsible people are overusing water and wasting it daily, a...
Wireless Water Level Indicator Without MCU
A wired water-level indicator uses many wires, whose resistance increases as their length increases. A wireless water level indicator using microcontroller (MCU) is costly and not very easy to program. Presented...
DC Power Meter for 0-55V 20A Work Bench Power Supply
This project describes how to make a low-cost DC power meter that can be used for displaying Voltage, current, power and the running time of operation. This is useful and can...
Reaction Time Game
This reaction time game tests the time taken by two players to react, and declare the fastest one as a winner. To do this I am using external interrupts and pin...
Make A Simple Power Supply For Adjustable Voltage And Current
Sometimes a simple analogue power supply with adjustable output voltage and adjustable current-limiting function is needed. This article presents a simple power supply using an adjustable regulator LM350 that provides variable...
Designing FM Receiver Using GNU Radio and RTL-SDR Dongle
This article covers the designing of an FM receiver using GNU Radio software and RTL-SDR hardware on Ubuntu operating system (OS). With advancements in software-defined radio (SDR), more supports are available...
Temperature Monitoring on Cayenne IoT Platform
This temperature monitoring system is based on Cayenne Internet of Things (IoT) platform, NodeMCU microcontroller (MCU) and Message Queuing Telemetry Transport (MQTT) protocol. The authors’ prototype is shown in Fig. 1.
Cayenne...
AUTOMATIC EMERGENCY LIGHT
This emergency light has the following two advantages:
1. It turns on automatically when the mains power fails, so you need not search it in the dark.
2. Its battery starts charging as...
