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The category holds various, simple, complex PCB circuits for Engineering students
The project will show a simple Battery Level Indicator Circuit
Simple mosquito repellent circuit by using 555 timer IC and few other commonly available components
A "Clap On Clap Off" switch is an interesting concept that could be used in home automation.
A laser security alarm which uses a laser light and a laser light detector circuit. It gets activated when someone crosses it.
A simple Microphone to Speaker system, in which input sound is given to the MIC and we hear the amplified version from the speaker