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MFRC-522 RC522 RFID RF IC Card Sensor Module

$3.94
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ESP8266 Serial to Wi-Fi Wireless Module for Arduino/ Raspberry

$4.11
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SIM900A Antenna Tested GSM GPRS Board Wireless Extension Module

$18.95
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Two-way Relay with Optocoupler Module Relay Expansion Board

$2.17
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4-Channel 5V Relay Module Low Strigger for Arduino

$4.22
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I2C RTC DS1307 AT24C32 Real Time Clock Module for Arduino

$1.62
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Soil Hygrometer Humidity Detection Module for Arduino

$1.55
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Electronics Fans Package Kit for Arduino

$12.89
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Micro Controller Board ATmega32u4 Leonardo for Arduino

$11.54
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DIY BL85-55 3V 160mA Solar Battery Panel – Black + Blue + Green

$4.36
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