Infrared receiver header details
Its main functions include amplification, frequency selection, and demodulation. The input signal needs to be a signal that has already been modulated. After its reception amplification and demodulation, the original signal is directly output at the output. So that the circuit is the most simplified! Sensitivity and anti-interference are very good, it can be said that it is an ideal device to receive infrared signals.
The infrared receiving circuit is usually composed of an infrared receiving diode and an amplifying circuit. The amplifying circuit is usually composed of an integrated block and a plurality of resistors and capacitors, and needs to be packaged in a metal shielding box, so the circuit is complicated and the volume is small. Less than a 7805 volume!
SFH506-38 and RPM-638 are a special infrared receiving circuit that integrates the infrared receiving tube and the amplifying circuit. It is small in size (comparable to a medium power transistor), has good sealing performance, high sensitivity, and price. Low, the market price is only a few dollars. It has only three pins, namely the positive pole of the power supply, the negative pole of the power supply and the signal output end. Its working voltage is about 5V. Just connect it to the power supply and it is a complete infrared receiving amplifier, which is very convenient to use.
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