1 Channel 12V Relay Module Optocoupler Mount
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This is the Product i used: 1 2 4 8 Channel 5V 12V Relay Module Board Shield with Optocoupler Support High and Low Level Trigger for Arduin0 https://vi.aliexpress.com/item/1005001525484340.html Spax Senkkopf Universalschraube PZ-Antrieb Ø 3 mm x 12 mm 30 Stück https://www.google.com/search?client=firefox-b-d&q=obi+m3x12+universal+schraube
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