Homemade infrared remote control detector ----- Infrared detector

Keywords: infrared remote control, detection Working principle After the infrared receiving header receives the modulated infrared signal, there is a signal output at its output, and then amplify the information signal by the triode (this signal has the characteristics of the audio signal), and then the volume potentiometer that is coupled to the radio by capacitor. The input, adjust the volume potentiometer to the appropriate location, and the "Dudu" sound in the speaker, while smoothizing the light-emitting diode on both ends of the speaker. 2. Component selection In the infrared receiving head, the model is HS3008; 1OOKΩ adjustable resistor is only one; the triode is one, the model is C1627, and other NPN-type three-pole; 500Ω resistors; 4.7uf / 16V electrolytic capacitance; old pocket radio One (as long as the power amplifier circuit is normal). 3. Production method Remove the front-level circuit in the radio, only the power amplifier circuit is retained, and the infrared receiving circuit is mounted on the empty position of the radio circuit board, adjust the resistance of the adjustable resistor, so that the working current of the triode can be between 1.5 ~ 2mA. 4. How to use When the remote control is detected, as long as the remote control is aligned and press the button, the "Dudu" sound in the receiver, the light-emitting diode flashes, indicating that the detected remote control is basically normal. When the remote control button is pressed, the receiver does not respond, indicating that the remote control is bad. Liu Qin

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