1. The handheld remote control is principally composed of a microprocessor chip, a crystal oscillator, amplifying triode, remote control accessories infra-red gentle giving out diodes plus a keyboard matrix that comprise the remote device transmission.

2. The scanning signal power generator inside IC1 produces 5 scanning heartbeat signals at diverse instances, which are productivity from pins 5 to 9 and sent to the computer keyboard matrix circuit. When a essential is pushed, the related control indicate of your function crucial is enter for the important handle encoder from pins 10 to 14, along with the electronic digital sign of the related function is production.

3. Then this instruction code indicate is production through the finger encoder, and modulated around the provider sign through the modulator produce a higher regularity heartbeat train that contain practical details. After the output of pin 17 is amplified by the triode BG, it drives the infrared lighting giving out diode D to deliver out pulse modulation. Signal.

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