Standards and tests are essential to evaluate the quality and longevity of LEDs and luminaires. So test and measurement solutions have to keep pace...

The erratic behaviour of frequency-hopped signals makes them difficult to capture, verify and measure. Hence more effective tools and processes are required to design...

Though the reliability of brain scanning for lie detection is still under question, these tests are fast becoming popular with the crime investigating teams....

Here’s the circuit of a multi-switch input musical doorbell (shown in Fig.1). The circuit is built around the popular and less expensive quad D-latch...

This circuit (Fig. 1), used in conjunction with a thin piezoelectric plate,senses the vibration generated on knocking a surface (such as a door or...

Here are two night lamp circuits using LEDs. One could be used as a night-vision clock and the other as a TV lamp. Both...

Won’t it be nice to have music playing in the background all the while when you take a shower? This simple circuit does the...

In small towns, there are no traffic lights and the police regulate the traffic with hand signals. Since their hand signals may not be...

This simple traffic controller can be used to teach children rudiments of traffic rules. The circuit (shown in Fig. 1) uses readily available components. It...

Electric kettles turn off automatically when water has boiled. What if the boiler beeps to alert you when your water has boiled? The tripping...