Velleman K8089, Illustrated Assembly Manual

Page: 6 / 16

6
Construction
R1 : 100K (1 - 0 - 4 - B)
R2 : 10 (1 - 0 - 0 - B)
R3 : 22K (2 - 2 - 3 - B)
R4 : 22K (2 - 2 - 3 - B)
R5 : 240 (2 - 4 - 0 - 0 - 1)
R6 ... R37 : 220 (2 - 2 - 1 - B)
!
R38 : 1K (1 - 0 - 2 - B)
R39 ... R42 : 10K (1 - 0 - 3 - B)
!
R44 : 220 (2 - 2 - 1 - B)
R45 : 2K2 (2 - 2 - 2 - B)
R46 : 10K (1 - 0 - 3 - B)
1. Resistors.
R...
Hint:
if you want the mount the clock against a wall, you can use the unstuffed
PCB as a template to mark the drill holes.
D1 : 1N4007
D2 : 1N4007
D3 : 1N4007
D4 : 1N4007
D5 : BAT85
D6 : BAT85
D7 : 1N4148
2. Diodes (check the polarity)
C A T H O D E
D ...
ZD1 : 4V3
ZD2 : 4V3
ZD2 : 4V3
ZD3 : 4V3
3. Zener diodes (check the polarity)
CATHODE
ZD...
Hint: resistors can be soldered at
component side of the board.
IC1 : 14p
IC2 : 16p
IC3 : 16p
IC4 : 16p
IC5 : 16p
4. IC sockets. Watch the position
of the notch!
IC...
1
C1 ... C11 : 100nF (104)
C13 : 100nF (104)
5. Capacitors
c...
SW1 : Open / closed
6. Switches
SW1.
Hi
nt: mount a screw connector if remote
selection is needed, see step 12.