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Smartphone Based Liquid Level Monitoring System

Measurement of liquid level in process tanks for monitoring and/or controlling is essential in process industries. In process plants, tanks contain various liquids that...

6W+6W Stereo Amplifier Using LA4440

Here is a simple project of a 6W+6W stereo amplifier using a 14-pin LA4440 IC. This amplifier can deliver an output power of 6W...

LED Emergency Light Cum Power Bank Plus Mini Fan Driver

This simple circuit can be used as an LED emergency light, a power bank for charging mobile phones, and as on-the-go (OTG) USB DC...

Automatic Water Dispenser

A branded automatic water dispenser is usually expensive. So, a relatively low-cost do-it-yourself solution is presented here. It is a portable general-purpose automatic water...

DIY: Low Noise Power Supply With Four ICs In Parallel

This article presents a low-noise power supply with four 78L15 voltage regulators in parallel, giving about 15V DC output. The modern environment has become...

Smart 230V AC Bulb Holder

The smart 230V AC bulb holder introduced here is an ultra-simple device with an automatic electric bulb controller switch and a standard electric bulb...

Automatic Lights and Door Without Microcontroller

There are various IoT devices available in the market that perform tasks based on voice commands such as opening a door or switching on/off...

Low-cost 3.7V to 5V-6V DC-to-DC converter

This article presents a simple, low-cost DC to DC converter that converts 3.6V-3.7V battery input into three outputs of 6V, 5.3V and 5V. These...

14-Watt Hi-Fi Audio Amplifier Using TDA2030A

Here is a simple mono audio amplifier using a single 5-pin IC TDA2030A. This IC is inexpensive and easily available in the market. The...

IR Based Automatic Hand Sanitiser Dispenser

This project is based on an infrared (IR) sensor, which detects the presence of hands and consequently activates the motor pump to dispense alcohol-based...

Make A 9V Battery Adaptor For Arduino Board

Arduino board requires a USB cable connected to a laptop/PC or an external AC/DC adaptor for power supply. If you want a portable Arduino-based...

Make A Simple Capacitive Touch Keyboard With Arduino

Certain shortcuts on your keyboard such as copy, paste or print can definitely simplify your work. And what if you can create these different...

Solar Day Lamp With Battery Backup

This solar day lamp with battery backup can be used in offices, homes, shops, warehouses, temples, etc. It offers a cost-effective way of harnessing...

Automatic Hand-Wash Timer

According to the World Health Organization (WHO) guidelines, people need to wash their hands with soap and water at least for 20 seconds to...

Make This Automatic LED Staircase Light

Going up or down a staircase can be a challenging task at night, especially for kids and elderly people. This Automatic LED Staircase Light...

Portable Solar Lantern Cum Bedlight

This portable solar-powered lantern with auto bedlight for everyday use can be made with easily available components. The circuit diagram of the portable solar lantern...

This Stereo Amplifier Is Simple To Make

Here is a simple stereo amplifier you can make with a CD6283 audio amplifier and a few passive components. It provides an output of...

Build A Universal AC/DC Booster, Audio Amplifier Cum Line Driver

A universal AC/DC booster, audio amplifier and line driver can be used in sensor circuits, audio signal generators, electrical guitars and so on. Most...
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