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1. SMAKN® DC 12V 4-Channel Voltage Professional LM393 Comparator Module

Ranked 1st in our list of recommended comparators and sells for $22.90 (as of 11/10/2018 11:23 PDT details ) , more than 100% of the SMAKN product reviews are positive. With features such as working current relay pulls in full dc12v 200ma and when the relay does not work lt 2ma, it is indeed our top pick among comparators.



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