Produino 10PCS LM393 Comparator Speed Sensor Module for Arduino – Blue

Price:
US$7.33

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Overview and Specifications:

Main chip: LM393;
With output status indicator light, lower level, light on;
High level, light off;
Working voltage: 3.3~12V;
Output format: 0 and 1 digit
Widely be used in dynamo speed detecting or Arduino DIY project

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