Modulated 38Khz IR Driver
Well at last! I was able to finished and satisfied with the result...:D
My very own modulated 38khz IR driver using 2 pcs. LM555 timer IC...
Circuit Description:
U2 (LM555/NE555) was configured as ASTABLE multivibrator producing 38Khz square wave signal. Diode D3 was added to improve the duty cycle.
U1 is another ASTABLE same as U2 but operating at much lower frequency 1.7 - 1.8Khz and its main function is to modulate U2. Turning the output of U2 ON and OFF at 1.7 to 1.8 thousand times per second...:D
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