Pololu Multi-Hub Wheel w/Inserts for 3mm and 4mm Shafts - 80×10mm, White, 2-Pack Shipping:2-4 Weeks so even when moving the

so even when moving the LED around

assembled and connected to an Arduino Uno R3

NFC Tags (order as many as you want to have to put on key rings)

Breadboard-friednly 0

Pololu Multi-Hub Wheel w/Inserts for 3mm and 4mm Shafts - 80×10mm, White, 2-Pack Shipping:2-4 Weeks so even when moving theThese versatile white plastic wheels have silicone tires and measure 80 mm (3. 15) in diameter. What makes them special is the included set of interchangeable collets that can be inserted into the wheel to firmly grab four different shaft types: 3mm D, 3mm round, 4mm D, and 4mm round. The collet inserts start with a comfortably loose fit on their intended shafts, and unlike simple press fit wheels, their grip on the shaft gets progressively tighter as