Many electronic circuits require a voltage higher than that available from the power supply. For example, when only a 12V battery or adaptor is available but a circuit requires 20V to 24V, a ...

This light cum room freshener module offers two choices. In the first choice, the room freshener spray and a small LED light get activated for three to five seconds. In the second choice, where a ...

If we told you that a C preprocessor hack dated back to 1968, you’d be within your rights to remind us that C didn’t exist in 1968. However, assemblers with preprocessors did, and where there is a ...

Motion sensor circuits are there on the Internet for quite a while now. These circuits are mainly used to drive AC load (like lights, fans) in home automation or IoT projects. It is also very common ...

“HW-687 is one easy module for adding speed regulation to your next DC motor-based project. It is a simple pulse-width–modulated speed controller providing smooth control with almost no jerks. There ...

This ultrasonic dog repeller circuit will chase away angry dogs. It is build with the all known 555 circuit, a buzzer and a little ferrite transformator. The ultrasonic frequency must be set with a ...