Velleman K8091EU User manual

LED CLOCK with SLOW ON DIMMER
H8091IP-1
AttractiveLEDclockwithnightlightconnection
K8091EUK8091EU

3
Features & specifications
The K8091 is an attractive LED clock with connection possibility for a nightlight.
15 minutes before the set time, the light intensity of the connected light will
increase up to full power at set time and beeps will be heard. The beep length is
gradually built up so you will not be startled by a sudden alarm signal.
Features :
clock with red 7-segment display.
possibility to connect any lamp armature fitted with an incandescent light bulb
sleep function (15 min) for slow light power-off.
snooze function with alarm repeat function after 8 min.
manually settable light intensity.
beep and / or light option.
Specifications
 power supply: 220- 240V AC / 50Hz.
 lamp power: 40 ~ 100W max.
 power consumption: < 1W (without lamp)
 dimensions: 92x45x101mm / 3.6x1.8x3.9"
WARNING !
ALL PARTS IN THIS KIT CARRY HAZARDOUS VOLTAGES WHICH CAN KILL !
Do not touch any part of the kit while connected to the AC grid.
Do not modify the kit in any way.
Do not use the kit if the enclosure is damaged or open.
For use with regular incandescent lightbulbs (40-100W) only.
Not suited for low-voltage halogen lighting, energy saving bulbs, led lighting,
fluorescent lighting, motors, buzzers, transformers etc...
We highly recommend to have your kit inspected by a qualified technician
before connecting it to the AC power for the first time or after a malfunction.

4
Assembly hints
1. Assembly (Skipping this can lead to troubles ! )
Ok, so we have your attention. These hints will help you to make this project
successful. Read them carefully.
1.1 Make sure you have the right tools:
 A good quality soldering iron (25-40W) with a
small tip.
 Wipe it often on a wet sponge or cloth, to keep it clean; then apply solder to
the tip, to give it a wet look. This is called ‘thinning’ and will protect
the tip, and enables you to make good connections. When solder
rolls off the tip, it needs cleaning.
 Thin raisin-core solder. Do not use any flux or grease.
 A diagonal cutter to trim excess wires. To avoid injury when cutting
excess leads, hold the lead so they cannot fly towards the eyes.
 Needle nose pliers, for bending leads, or to hold compo-
nents in place.
 Small blade and Phillips screwdrivers. A basic range
is fine.
For some projects, a basic multi-meter is required, or might
be handy
1.2 Assembly Hints :
Make sure the skill level matches your experience, to avoid disappointments.
Follow the instructions carefully. Read and understand the entire step before
you perform each operation.
Perform the assembly in the correct order as stated in this manual
Position all parts on the PCB (Printed Circuit Board) as shown on the draw-
ings.
Values on the circuit diagram are subject to changes.
Values in this assembly guide are correct*
0.000

5
Use the check-boxes to mark your progress.
Please read the included information on safety and customer service
* Typographical inaccuracies excluded. Always look for possible last minute
manual updates, indicated as ‘NOTE’ on a separate leaflet.
1.3 Soldering Hints :
1- Mount the component against the PCB
surface and carefully solder the leads
2- Make sure the solder joints are cone-shaped
and shiny
3- Trim excess leads as close as possible to the
solder joint
REMOVE THEM FROM THE TAPE ONE AT
A TIME !
Assembly hints
AXIAL COMPONENTS ARE TAPED IN
THE CORRECT MOUNTING SEQUENCE !

6
Construction
(1) ASSEMBLY OF THE COMPONENT SIDE
ZD1 : 15V0
3. Zener diode (check the polarity)
CATHODE
ZD...
C1 : 100nF (104)
C2 : 100nF (104)
C3 : 100nF (104)
C4 : 10nF (103)
C5 : 100pF (101)
5. Capacitors
c...
1/8W:
R1 : 100 (1 - 0 - 1 - B)
R2 : 100 (1 - 0 - 1 - B)
R3 : 100 (1 - 0 - 1 - B)
R4 : 100 (1 - 0 - 1 - B)
R5 : 100 (1 - 0 - 1 - B)
R6 : 100 (1 - 0 - 1 - B)
R7 : 100 (1 - 0 - 1 - B)
R13 : 10K (1 - 0 - 3 - B)
R14 : 10K (1 - 0 - 3 - B)
R16 : 10 (1 - 0 - 0 - B)
1/2W "metal film" :
R8 : 47 (4 - 7 - 0 - B - 9)
R9 : 10 (1 - 0 - 0 - B - 9)
R10 : 470K (4 - 7 - 4 - B - 9)
R11 : 470K (4 - 7 - 4 - B - 9)
R12 : 100K (1 - 0 - 4 - B - 9)
1/4W:
R15 : 220 (2 - 2 - 1 - B)
1. Resistors
R...
D1 : 1N4148
D2 : 1N4148
D3 : 1N4148
D4 : 1N4148
D5 : 1N4007
2. Diodes (check the polarity)
CATHODE
IC1 : 18p
Mind the position of the notch and shorten
the connection pins as short as possible
after soldering!
4. IC socket. Watch the position of
the notch!
IC...
1
D...
F1 : 1A
6. Fuse.
BUZ1(3-6VDC/25mA)
7. Buzzer
+
BUZ...

7
R17 : 220 (2 - 2 - 1 - B)
Construction
SK1 : 2p (AC IN)
SK2 : 2p (output)
12. Terminal blocks
10. 1W Resistor
VR2: UA78L05
9. Voltage regulator
VR...
C8 : 220µF
C9 : 10µF
11. Electrolytic capacitors.
Watch the polarity !
C...
C6 : 100nF
C7 : 470nF
13. Capacitors
SW1
SW2
SW3
14. Push buttons
TR1 : BT136
15. Triac
TR...
T1 : BC547
8. Transistor
T1
IC1: VK8091EU
Programmed PIC16F627A
16. IC

8
Construction
 Mount the four digit display first.
DY1 : 4-digit
 Mounting the coil:
1) Cut the rubber foot and stick it to the PCB as shown.
2) Position the coil onto the rubber foot. Bend the leads carefully and insert
them into their soldering pads. Solder carefully.
1. Four digit display & coil
(2) MOUNT THESE COMPONENTS ON THE PCB SOLDERSIDE, SOLDER
THEM ON THE COMPONENTS SIDE
!
min.
2mm

9
construction
2. Power cable
+/- 45cm
 Cut 45cm of the included cable, measured from the female connector.
 Put both cables trough the hole on the rear cover of the housing.
 Strip the male and female cable.
 Connect the female cable/connector to the output connector
SK2, the male cable/connector to output connector SK1
 When both cables have been connected to the K8091EU
mount the strain relief and tighten up with the included 15mm
bolts and M3 nuts.
20mm
7mm
Twist & thin the wires!
L N N L
AC OUT
M3 bolt
Strain relief
M3 lock washer
M3 nut
SK1 SK2 SK1
SK2

10
Assembly
3. Assembly
select mode
Light / Buzzer
sleep / snooze
dim / cancel alarm
run mode
on
off
time
hour
minutes
time set
alarm set
light/buzzer alarm/light
activated
Indications :
Control :
Product description
Stick the rear sticker on the backside of the housing, see figure.
Rear-sticker
Before mounting the PCB on its place you must mount
the red display.
After placing the red display mount the
PCB in the front cover with the 4-digit
display facing to the red
display window with 4 screws.
At last mount the rear of the housing
and closed with 4 screws.
(a)
(b)
(c)