| 摘要 |
PURPOSE:To accurately generate a remote control waveform by providing a counter connected to a carrier signal generation circuit in a microcomputer and counts a carrier signal. CONSTITUTION:The output side of the carrier signal generation circuit 2 provided in the microcomputer 1 and generates the carrier signal is connected to the base of a transistor 4 via a resistor 3. The emitter of the transistor 4 is grounded, and the collector is connected to a positive power source via an infrared light emitting diode 5 and a resistor 6. The carrier signal outputted from the carrier signal generation circuit 2 is supplied again to the counter 9 incorporated in the microcomputer 1, and the number of it is counted correctly. In such a way, the remote control waveform can accurately be generated. |
