The proposed IoT-based distribution transformer condition monitoring system enables real-time monitoring of distribution transformers, identifying such deviations as overload conditions…

This post describes a circuit that has a capacitive input sensor and a switching transistor at the output PNP. When…

Nowadays you can buy white LEDs, which emit quite a bit oflight. They are so bright that you shouldn’t look…

While driving on highways, motorists should not exceed the maximum speed limitpermitted for their vehicles. However, accidents keep occurring due…

The Diode Clipper, also known as a Diode Limiter, is a wave shaping circuit that takes an input waveform and…

The amplifier features delay, dc protection, and temperature monitoring across the speaker protection circuits. Since the application of short circuit…

Push-button bathroom fan switch design supports timed operation. This design switches a 120VAC load, and includes several much-needed details on…

A universal problem in battery-operated devices is the threat of damage when an end user (never an engineer) inserts the…

Polarity-correcting circuit protects battery-powered devices. previously-published Design Idea outlined a polarity protection circuit that provides the correct connection of the…

Kirchhoff’s Voltage Law (KVL) is Kirchhoff’s second law that deals with the conservation of energy around a closed circuit path….

A Voltage Source is a device that generates an exact output voltage which, in theory, does not change regardless of…

The principle behind this wind speed meter without moving parts is based on the measurement of a temperature difference. We…

Nobody pays much attention to automatically opening and closing sliding doors nowadays. In view of the complex mechanics involved, not…

This application of the well-known Type 555 timer is intended for model railway enthusiasts wishing to construct a two-lamp flashing…

Contactless Voltage Tester

INFRA-RED LIGHT BARRIER Infrared light barriers enjoy great popularity as timing devices at sports venues, as detectors in alarm installations,…

FOUR POSITION TOUCH DIMMER Any electric light may be adjusted with this dimmer to very low, low, medium, and maximum,…

FLASHING LIGHT WITH TWILIGHT SWITCH The special feature of this flashing light is the op- tical switch, which automatically switches…