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 ...
NEC protocol is the most popular in infrared remote control encoding protocols, and my FPGA board employs it. NEC protocol uses Pulse Position Modulation(PPM) to encode. When a button is pressed on ...