Gears Belt Pulley Shaft Sleeve Colorful Plastic Kit sen0017 These are also referred to

These are also referred to as X connectors or star connectors

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Character LCD modules may use either parallel wiring or an I2C backpack

The Solenoid Lock Round Tongue Mini Electric LY-01 DC12V is a practical solenoid from Circuitrocks for students

Adjustable sensitivity: Tune the light threshold on the board

Gears Belt Pulley Shaft Sleeve Colorful Plastic Kit sen0017 These are also referred toModel Color Specification 82A   Copper Gear 562A Orange Red   562A Blue   502A Orange Red   102A Yellow   102A Blue   102A Long Orange Red   15T Blue 2. 3mm 15T Blue 3. 17mm 15T Blue D Type 3mm 15T Blue D Type 4mm MXL16T Blue 3mm MXL16T Blue 4mm MXL16T Blue 5mm 36102B Purple   40102B Red   40102B Yellow   23202B Black   24182B Blue   24222B Blue   81. 4A Orange Red   301. 8B Green