This is a 1.5V FM transmitter circuit diagram. This circuit can
broadcast your voice around your house in the 88 to 108 MHz band. This
circuit uses 1.5 volt DC battery, you can also use small 1.5V watch
battery to power the circuit.
L1 is equal to 5 turns of 0.7mm enameled wire wound on a 3mm form. This wireless transmitter is able to transmit at a distance of 30 meters. Credit for this circuit is given to: circuitdiagram.org. I simply did all of the Layouts for you.