I desoldered a component, HY-05 Electro-magnetic sound generator, from a broken motherboard. Its DCV is 3~8V, operating frequency 2400 plus or minus 200 Hz. I can get a small metallic sound with the operating voltage probably because the frequency is wrong. How can I adjust the frequency in the power supply of 50Hz? If the question is bizarre, it may be that the component is just broken.