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Arduino 6 Channel Relay Module has power and relay operation instructions
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How to turn on delay start (default 0ff):
The XH-M452 electronic temperature and humidity controller is of a relay type
Mini FM Transmitter Wireless Microphone Surveillance Frequency Board Module for Arduino Adjustable Capacitor DC 3V 9mA 88-115MHz Ut07a Arduino 6 Channel Relay ModuleFeatures: Operating Voltage: DC 2V 9V Current: 9mA (3V voltage Reference distance: open ground 100 meters 10 30 meters indoor environmental obstacles (3v voltage test increasing the voltage from the greatly increased) Operating frequency: 85MHZ 115MHZ (usually between 99 101 boot default frequency) Receive way: as long as the 88 108MHz FM radio can receive with FM feature phones. Frequency adjustment: adjustable capacitor Output Impedance: 50 ohms