This circuit generates two different frequencies and mixes these to produce a balanced ringing tone, which can be used in burglar alarms or call...

Usually, the audio output from a laptop’s built-in speakers is low. A power amplifier is required to get a high volume. Here is a...

Today, the mobile Internet is providing unprecedented opportunity to include more than two-thirds of the world’s population into main-stream services, such as banking, health-care,...

Applied Materials, Inc. is the global leader in providing equipment, services and software to enable the manufacture of advanced semiconductor, flat panel display and...

Today, most of the electronics devices come with a liquid crystal display (LCD). Even new fridges have it. It is interesting as well as...

Motion control plays a vital role in industrial automation. Manufacturing plants in industries like chemical, pharmaceutical, plastic and textile, all require motion control. And...

This standalone digital thermometer controls the temperature of a device according to its requirement. It also displays the temperature on four 7-segment displays in...

The basic requirements of a realtime programmable timer generally used in schools and colleges for sounding the bell on time are: • Precise time base...

This project based on Atmel AT89C52 and Dallas real-time-clock (RTC) chip DS12887 can be used to control and remotely program the switching operation of...

Small DC motors are efficiently controlled using pulse-width modulation (PWM) method. The circuit described here is built around an LM324 low-power quad-operational amplifier. Of...