Good idea. I never thought of using a 555. Do you know what value resistors and capacitor i would need to get the right frequency? Ive been using a 555 calculator and ive got 0.820K, 1.5K and 0.01uF. They give about 37.6MHz. Does it have to be exactly 38.5KHz?

Is there a way to calculate what resistors and capacitors to use? It would be better if there was a calculator where you can enter the Hz and it will calculate those for you.