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You can make a digital sound synthesizer, for experimentation with sound equipment or with peripheral devices, using special integrated circuits or digital-to-analogue converters (DACs). But here is a simple 8-input digital sound-synthesis circuit for producing audio from digital codes...
An always-on network backup device accessible to a computer from both outside and inside the network is a highly desirable thing. As the system will always be on, power consumption is an important consideration. These requirements are fairly met...
With just two simple Python files, an inexpensive LCD display and a low-cost digital temperature sensor, you can turn Raspberry Pi into a beautiful LCD clock with IP address and temperature indication facility. There will still be a few...
Consider this: A criminal stops your car by force and you are left with no option but to surrender the car. The criminal drives away your car, but about 60 seconds later the engine stops running on its own...
The concept of controlling various servo motors through Arduino Uno board is introduced here with a fun project called ‘namaste Greeting robot.’ The robot turns its head by 180° and scans people in its range using an ultrasonic module....
Presented here is the design of a low-cost Gauss meter using a linear Hall effect sensor and a standard alkaline battery. A Gauss meter is used to measure the strength of a magnetic field. Here, in order to make...
This Global Positioning System (GPS)-based timer is used to turn on and turn off a radio receiver at a specific time. The GPS clock works as the timer for turning on and turning off any digital or analogue radio...
Presented here is a microcontroller-based special-purpose programmable interval timer for live shows and competitions to record time while the contestants are performing. The main objective of this project is to design an accurate programmable interval timer that can be...
Several articles about water-level controllers for overhead tanks have been published in earlier issues of EFY magazine. But the project we are going to share today is new and unique. So presented here is a Web-based water-level monitor and...
This simple circuit can be used to light a small area at night. It is useful as a nifty bedroom night lamp, but it can also be used for other applications. The circuit is versatile and fully-automatic but draws...