his mosquito repelling circuit is made around the IC 555. Here the IC 555 is used as an oscillator which generates frequency in the range of 220 Hz to 62 KHz. This frequency can be adjusted by using the preset R2 connePart list:::IC 555Loudspeaker or Earphone 8EResistance :: 220E, Controls 1M and 5RCapacitors::0.1, 100MF, 10V, 0.005cted in the circuit.
