please see the transmitter side,this is the circuit i used to produce the 38khz signal.
by the way,if i only using the internal clock of PIC16F877A,will it function?i mean to modulate the signal?my receiver is tssp6p38 and this is the receiver.
nothing happen -.- do you know how to modulate it by crystal oscillator?or the internal clock of microcontroller? i'm using PIC16F877A. do you have any reference circuit?