This is a simple design circuit of remote control. In this circuit is using infrared for controlling. Besides the infrared, this IC have core of operation that is used NE555 IC. This is the figure of the infrared remote control circuit.
Infrared remote controls are using a 32-56 kHz modulated square wave for communication. These circuits are used to transmit a 1-4 kHz digital signal (OOK modulation) through infra light (this is the maximum attainable speed, 1000-4000 bits per sec). The transmitter oscillator runs with adjustable frequency in the 32-56kHz range, and is being turned ON/OFF with the modulating signal, a TTL voltage on the MOD input. On the receiver side a photodiode takes up the signal. The integrated circuit inside the chip is sensitive only around a specified frequency in the 32-56 kHz range. The output is the demodulated digital input (but usually inverted), just what we used to drive the transmitter. When the carrier is present, this output is usually low. When no carrier is detected, the output is usually high.
Part Component:
R1 = 1k, R2 = 15-22k use a 15k resistor series with a 10k potmeter to adjust frequency in the 32-40kHz range, R3 = 15 @5VDC, 200 mA peak/35 @9VDC, 200 mA peak/50 @12VDC, 200 mA peak, C1 = 1n, C2 = 47n
Infrared remote controls are using a 32-56 kHz modulated square wave for communication. These circuits are used to transmit a 1-4 kHz digital signal (OOK modulation) through infra light (this is the maximum attainable speed, 1000-4000 bits per sec). The transmitter oscillator runs with adjustable frequency in the 32-56kHz range, and is being turned ON/OFF with the modulating signal, a TTL voltage on the MOD input. On the receiver side a photodiode takes up the signal. The integrated circuit inside the chip is sensitive only around a specified frequency in the 32-56 kHz range. The output is the demodulated digital input (but usually inverted), just what we used to drive the transmitter. When the carrier is present, this output is usually low. When no carrier is detected, the output is usually high.
Part Component:
R1 = 1k, R2 = 15-22k use a 15k resistor series with a 10k potmeter to adjust frequency in the 32-40kHz range, R3 = 15 @5VDC, 200 mA peak/35 @9VDC, 200 mA peak/50 @12VDC, 200 mA peak, C1 = 1n, C2 = 47n
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