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This circuit uses a NE555 timer IC, some LEDs, a couple of piezo buzzers and a few other components to produce audio-visual effects as per your requirement. The timer NE555 and its equivalents are widely used for all sorts...
A lot of accidents happen every day due to drunk driving. This is a very useful circuit for testing whether a driver is drunk or not. The circuit is easy to use, inexpensive and indicates various levels of alcohol...
Normally, ATMEL’s AVR microcontrollers are programmed using programmers. There are many ways to program the AVR microcontrollers, such as in-system programming, parallel programming and using bootloader. Advantage with the bootloader method is that you don’t need any external hardware...
Be it for weather prediction, detecting air flow movement through pipelines or obtaining altitude position with the help of a drone, pressure measurement plays an important role in a wide range of applications such as gas leakage, detection of...
This article discusses the importance of Digital Camera histograms generated by high-end cameras, which help in clicking better pictures. Apart from a general discussion on histograms, a MATLAB implementation of the same is provided for the hard-core programmers. Histogram is...
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...