What is the Hall Effect Sensor/Device A device which converts magnetic or magnetically encoded information into electrical signals is called HALL EFECT SENSOR. A Hall Effect device/sensor is a solid state device that is becoming more and more popular because of its many uses in different types of applications. Hall Effect devices are immune to…

The above circuit is a simple VHF FM transmitter circuit. It is basically a VHF colipits oscillator capable of transmitting sound or music to any standard FM receiver.The circuit works on a small 9V battery which makes it easily portable. It also has a capacitor microphone which picks up very weak sound signals. The output frequency…