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You can use it when you have a power supply with a barrel jack and want to plug it into a breadboard
Non-contact optical switch
I2C serial interface
the resistance of LDR will become low according to the intensity of light
Mini Limit Switch Screwdriver You can use it whenIntroduction : Limit switch is a switch operated by the motion of a machine part or presence of an object. Features : Actuator : 17mm lever. Rating : 5A at 250ACV.
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