*BZZZZZZZZZZ* Feel that? That's your little buzzing motor, and for any haptic feedback project you'll want to pick up a few of them. These vibe motors are tiny discs, completely sealed up so they're easy to use and embed.
Two wires are used to control/power the vibe. Simply provide power from a battery or microcontroller pin (red is positive, blue is negative) and it will buzz away. Works from 2V up to 5V, higher voltages result in more current draw but also a stronger vibration.
If you want to reduce the current draw/strength (for example, to control it directly from an Arduino pin) try putting a resistor (100 to 1000 ohms) in series.
Dimension: 10mm diameter, 2.7mm thick
Voltage: 2V - 5V
5V current draw: 100mA, 4V current draw: 80mA, 3V current draw: 60mA, 2V current draw: 40mA
11000 RPM at 5V
Weight: 0.9 gram