I recently bought myself an Arduino and I happened to have an infrared detector too. Therefore, (obviously) I had to figure out how to use ALL of the remote controls in my house to do something ...

As you might have noticed, the 38-KHz pulse generator is built around the evergreen timer chip NE555P (IC1). Here, the RC components (R5-C3-P1) set the astable frequency to drive the infrared light ...