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5V 12 V DC Delay Relay Module with Timer Switch On/Off, 1 Channel Relay Module Relay Board with Timer Volt 10A Switch Controller Module Trigger Expansion Board for Arduino (12V) : Amazon.co.uk:
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Gikfun DV 6V~30V Multifunction Trigger Delay Time Module Switch Control Timer Relay Digit LED Display Micro USB 5V for Arduino EK1945
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