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10PCS Knock Sensor Module with LED KY-031 For Arduino PIC AVR Raspberry

1-200pcs KY-003 Standard Hall Magnetic Force Sensor Module for AVR Smart Car DIY

DC 12V Digital LCD Programmable Timer Time Relay 16A Amps B8X25872

Protable Delay Relay Module Controller Programmable 7.1*3.9*2.5cm DC12V