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About Infrared Receiver Module: The Infrared Receiver is based on HL-A838 integrated infrared receiver modules£¬ IR transmitter module can receive incoming 38KHz modulated infrared signal£¬ and demodulated into logic level£¬ when it receives the modulated infrared signal then output low level£¬ otherwise output high level. Infrared remote control can be completed by encoding and decoding codes. Features: - Add proprietary power supply filter circuit and the signal for pull-up resistor to protect the circuit and signal stability; - Funny and easy to use; - Low-power£¬ wide angle; - Long distance reception: 8m (Max) at VCC = 5V; - Operating voltage: 3.3~5.5V; - Output logic level: TTL£¬ CMOS level compatible and active low level; - Arduino library: Arduino-1.5 libraries IR remote. About Remote Controller: - Encoding format: NEC coded; - Transmission Distance: 8m (Max); - Carrier frequency: 37.9 KHz +/- 0.8%; - Battery Specifications: CR2025 160mAh; - Great for DIY project.