Review on BestTong Miniature Vibrating Vibration Coreless by Jason Childs

Running on a reliable 3.7 volt lithium polymer battery generates quite a bit of vibration! Very high speed! What do I use them for? Individual crafts for adults. What they actually need is a resistor, a potentiometer, or something that will make them produce a nicer vibration. I think if your project involves a less intimate use of these things they would be perfect. Very small, very fast and can be operated over a wide range of DC voltages. Good price for many of them!