This Simple Over-Temperature Warning Indicator Circuit uses an LED to indicate excessive temperature, as it uses only a few easily available components, making the circuit simple, low cost, and easy to build. The circuit turns ON an LED when temperature rises above a set level like 45°C – 55°C and therefore, it is useful for […]
Sensors and Detectors
Arduino Flash Trigger Circuit with Sound Sensor
Nowadays, electronics projects are becoming very popular, especially Arduino based projects are easy to build, because of this the beginners also feel confident. In this project, an Arduino monitors the sound sensor and triggers the camera flash when it detects a sound. So Arduino Flash Trigger Circuit with Sound Sensor is very useful for high […]
Solar Cell Based Camera Flash Trigger Circuit
Photography flash units need correct timing; however, many old flash units do not have trigger input, so a Solar Cell Based Camera Flash Trigger Circuit is useful, as this circuit is very simple as it uses very few components and also it does not need any battery. The circuit operates by detecting light, when the […]
220V AC Live Detection and Interface Circuit
Handling 220V AC directly is very dangerous, but still we need to know mains is ON or OFF; so, this 220V AC Live Detection and Interface Circuit is useful as it solves this safety problem easily. This circuit safely senses the mains voltage and sends a clean logic-level signal, then an optocoupler provides isolation, keeping […]
Transistor Based Water Level Alarm Circuit
Sometimes the water tank becomes full, but we forget to switch OFF the motor, as a result, the system wastes water; so, this simple Transistor Based Water Level Alarm Circuit is useful, as it gives sound alert when water reaches a level. Moreover, the circuit is cheap and easy to build as it uses very […]
Darkness Activated LED Circuit
This article explains about a Darkness Activated LED Circuit which is useful device that saves power, also it is energy efficient circuit because light glows only in darkness. The circuit automatically turns the light ON at night and OFF during the day, so we never need a manual switch for daily operation; also the circuit […]