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Velleman-Kit K2649 Illustrated Assembly Manual page 6

Thermostat with lcd-display, digital readout of both set and actual temperature

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Construction
A. POWER SUPPLY MODE 'P2649V'
1. Diode. Watch the polarity !
D5 : 1N4148
CATHODE
2. Zenerdiode. Watch the
polarity !
ZD...
CATHODE
ZD1 : 8V2 - 500mW.
3. Diodes. Watch the polarity !
D1 : 1N4007
D2 : 1N4007
CATHO DE
D3 : 1N4007
D4 : 1N4007
6
4. Resistors
D...
R1
:
560
R3
:
100K
R4
:
100K
R6
:
100K
R15 :
220K
R16 :
220K
R17 :
560K
R18 :
560K
R26 :
820
R27 :
1K
R28 :
10K
R29 :
82
R34 :
6K8
R35 :
5M6
D...
5. Metal film resistors
R...
(5 - 6 - 1 - B)
(1 - 0 - 4 - B)
(1 - 0 - 4 - B)
(1 - 0 - 4 - B)
(2 - 2 - 4 - B)
6. IC socket, Watch the
(2 - 2 - 4 - B)
position of the notch !
(5 - 6 - 4 - B)
(5 - 6 - 4 - B)
(8 - 2 - 1 - B)
(1 - 0 - 2 - B)
(1 - 0 - 3 - B)
(8 - 2 - 0 - B)
(6 - 8 - 2 - B)
(5 - 6 - 5 - B
R...
R20 : 10K (1 - 0 - 0 - 2 - 1)
R21 : 10K (1 - 0 - 0 - 2 - 1)
R22 : 47K (4 - 7 - 0 - 2 - 1)
R23 : 47K (4 - 7 - 0 - 2 - 1)
IC2 : 14P

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