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1 PCs 4 channel relay shield module control board expansion for arduino UNO R3
Tips: Function 1-8 is powered on automatically, function 9-18 requires a high level pulse signal (high level duration is not shorter than 20ms, the same below) triggers the start.

1 PCs 4 channel relay shield module control board expansion for arduino UNO R3

SKU: 153845674276
$12.99Price
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