Relay Motor Control Parts List
Item	Description	Part Number	Source
R1, R2 R3, R4	1.0 k 1/4 W resistor
R3, R4	100 k 1/4 W resistor	note had to switch to 1k to work, could try 10k
R5	2.2 k 1/4 W resistor
O1,O2	Optical Isolator, Darlington	4N32
D1	Power Diode	1N4004
D2	Schottky-type Diode	International Rectifier 20L15T (or salvage from drill ?)	Digi-Key 20L15T-ND
LED1	Bi directional LED	Use one red and one green standard diode
Q1	Power MOSFET	International Rectifier IRL520N	Digikey IRL520N-ND
Q2	Power MOSFET	STMicroelectronics STP60NF06	Digikey 497-2779-5-ND
K1	Relay, 12 VDC coil, 15 A contacts	Potter & Brumfield K10P-11D55-12	Digikey PB327-ND
M1	12 VDC Motor	From variable speed Drill