I'm going to send messages over an (IR) LED. The bits are 600 or 1200us long. This switching will be done in the Arduino, no problem. But between the Arduino and the LED (the MOSFET driving it, respectively) I want to put a 555 timer circuit (there will be lots of interrupts, and I always wanted to use a 555 ;) ), pulsing the LED with 56KHz.
So the output of the Arduino will (de)activate the 555. But how is this done best? Should I switch the Vcc, the Reset, the trigger of the 555?
Edit: Heres the datasheet: http://www.freshney.org/electronics/downloads/ts555.pdf