Dennis,In it's simplest form, a diode that can handle the peak motor current and reverse voltage of the power supply.
How was your 2015?
Thanx.. all who contributed to this thread. I will order the parts and build asap...
Theres a part that's sitting here ( but I will deal with it later ) motor control that I bought from Canakit... but as I say I'll put that in later...
R