COUNTDOWN3 Component list
-------------------------


Main Board:
-----------

- IC1: PIC16F84(A) (Microchip)
- IC2: 4543B BCD to 7-segment decoder-latch
- IC3: ULN2003A Darlington Transistor Array
- IC4: 555 Timer
- T1...T5: BC327 PNP transistor (Icmax=0.5A)
- D3,D4: 1N4148
- XTAL1: Crystal 4.0000MHz
- Buzzer: Piezo 5V (Velleman SV4/5S)
- C1,C2: 22pF
- C3...C6,C8,C9: 100nF
- C10: 2.2uF-35V-Tantalium
- R1...R3: 10KOhm-0.25W
- R4,R13...R16: 4.7KOhm-0.25W
- R5...R11: 150 Ohm-0.25W
- R17: 1KOhm-0.25W
- R18,R19: 100KOhm-0.25W
- 1x DIL 18pins
- 2x DIL 16pins
- 1x DIL 8pins
- PCB connector 4pins - male (Velleman BTWM4)
- PCB connector 4pins - female with wires (Velleman BTWF4)
- 4x Distance Bolts 10mm - female/female



Power Supply Board:
-------------------

- IC5: 7805 Regulator T0220
- IC6: 7809 Regulator T0220
- D2: 1N4148
- D5,D6: 1N4001
- Rel1: Relay 5V - SPDT (Velleman)
- C7: 100nF-400V
- C11: 1000uF-25V
- C12: 220nF
- C13: 10uF-35V-Tantalium
- C14,C15: 100nF
- R12: 470 Ohm- 0.25W
- T1: Transformer 220VAC-2x9V - 2x3VA
- F1: PCB Fuseholder 20x5mm (Velleman) + Fuse 1AT
- PCB connector with screws - 3poles - 5mm (Velleman) 
- PCB connector with screws - 2poles - 7.5mm (Velleman) 
- 4x Distance Bolts 10mm - female/female
- T0220 cooling fin for IC5 (Velleman)


Display Board:
--------------

- DISP1...DISP4: 7-Segment Display 10mm Common Anode
  (ex. Vishay TDSR3150, Kingbright SA39-11)
- D1: LED 3mm Red
- S1...S3: Pushbutton (Velleman D9)
- C4...C6: 10nF
- PCB connector 15pins - male - 90 (Velleman BTWMH15)
- PCB connector 15pins - female with wires (Velleman BTWF15)
- PCB connector 2pins - male - 90 (Velleman BTWMH2)
- PCB connector 2pins - female with wires (Velleman BTWF2)
- 4x Distance bolts 10mm - female/female


 (turbokeu@turbokeu.com)
