Board Components: XFR Wall Transformers 9VDC 350mA (Positive Center) MT7142-ND J1 Connector - Jack for wall transformer, 2.1mm CP-202A-ND J2 Connector - DB 9 female right ang (Amp745781-4) A2100-ND J3 Connector - Ribbon, rt, 34 pin (3M 3431-5002) MHR34K-ND J4 Connector - Conn Phoenix 2 pos (3.81) 277-1206-ND 227-1902-ND U1 Dip - 40 pin 3M5471-ND U2 MAX232A Dip - 16 pin MAX232ACPE+-ND U3 7805 vreg TO-220 KA7805ETU-ND U4 Dip - 8 pin A24794-ND R1 Resistor - 47K 1/8 watt 47KEBK-ND C1-2 Cap - 18pf Lead spacing 0.25 inch 1428PH-ND C9 Cap - 10uf 50v Lead spacing 0.2 inch (5mm) P5178-ND C3-8,10 Cap - 0.1uf Lead spacing 0.2 inch (5mm) 399-1348-ND X1 MP04A 4MH Crystal, DigiKey CTX080-ND CTX080-ND D1 Diode - 1N914 1N914CT-ND SW1 Switch - 6mm Push button (Omron B3F-1022) SW403-ND Optional Accessories: AE1379-ND CABLE DB9 MALE - DB9 FEMALE 2M 768-1014-ND CABLE USB-RS232 SERIAL CONVERTER Not available from Digikey: 3ea 4-32 X 3/8 screw 3ea 4-32 nut