This kit is great! Jason is very helpful with any questions or concerns you may have and the games are addicting and great fun to play. The code and design of this product is top-notch and it's worth every penny! A great buy!
This board does exactly what it says on the tin: It makes a "Y"-configured motor - common on hard disk drives - spin, the speed being roughly proportional to the applied voltage.
In order for this to work, the power supply must be of fairly low impedance and able to supply at least more than an amp of current without sagging much or else the motor may never start properly, this being the nature of typical HDD motors! The chip, aTDA5144, is fairly robust having built-in overcurrent and thermal protection.
As it turns out a supply in the range of 5 to 15 volts (for both the motor and chip's supply) but much above 10 volts will really cause the HDD motor to scream - and it probably won't last too long!
The board is small and well built and the connections/use is straightforward, but before using, it is strongly recommended that one gets the TDA5144 data sheet and review it.