10pcs Smart Electronics 4pin KEYES KY-028 Digital Temperature Thermistor Thermal Sensor Module Switch for Arduino DIY Starter

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 Simple circuit of digital temperature module

and integrated LED connecting to digital 13 interface
to make temperature indicator light.

 Use number 13 interface to connect the integrated LED,

connect digital temperature sensor to number 3 interface.
When the digital temperature sensor senses key signal,
the LED is on, otherwise, it's out. 
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