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Module de relais 4 canaux, 4 canaux module de relais 5V avec optocoupleur Module de déclenchement haut et bas pour Arduino 5V/12V/24V (5V) : Amazon.com.be: Bricolage
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4 Channel Relay Module 5V/12V/24V, Optocoupler Relay Module Board Trigger Up and Down for Arduino(5V) : Amazon.com.be: Electronics
