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Here we describe how to control electrical and electronic gadgets from a remote location using radio frequency (RF) transmission. An RF interface is used instead of infrared (IR) to avoid the drawbacks of an IR interface. Besides, RF has...
During development, testing and maintenance of digital and analogue electronic circuits and embedded systems, there is a need for TTL and CMOS signals produced by stable frequency sources. These sources are also useful for fast checking of oscilloscopes, probes,...
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 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...
We have seen many projects where a robot is controlled by a remote controller. Here we describe a robot (robocar) that can be steered in any direction just like you drive your car. Wireless steering senses the motion and...