Velleman K8003 is a compact and versatile DC controlled dimmer that provides precise control over lighting, motor speed, and other electrical devices using a safe DC voltage. With a maximum load capacity of 3.5A, it can handle up to 750W at 220V, 380W at 110V, and 80W at 24V, making it suitable for various applications. The optically isolated control voltage and load ensure safe operation, while the isolated triac further enhances safety. The K8003 is compatible with a wide range of control voltages from 0 to 10VDC, with a maximum control current of 2.25mA at 12VDC.
Velleman K8003 is a compact and versatile DC controlled dimmer that provides precise control over lighting, motor speed, and other electrical devices using a safe DC voltage. With a maximum load capacity of 3.5A, it can handle up to 750W at 220V, 380W at 110V, and 80W at 24V, making it suitable for various applications. The optically isolated control voltage and load ensure safe operation, while the isolated triac further enhances safety. The K8003 is compatible with a wide range of control voltages from 0 to 10VDC, with a maximum control current of 2.25mA at 12VDC.
Total solder points: 61
Skill level :
Beginner 1o 2o 3þ 4o 5o Advanced
MANUAL H8003IP-ED3
K8003 DC CONTROLLED DIMMER
Manual
This small but handy circuit is ideal for replacing an existing
dimmer or switch, in order to be able to control a lamp, set of
lamps or even a moter via an adjustable DC voltage. One obvi-
ous application is control via the K8000 interface board, thanks
to its optically isolated input.
Specifications :
þ Operating voltages : 24, 110-125 or 220-240VAC 50/60Hz
þ Max. load : 3.5A (750W/220V; 380W/110V; 80W/24V)
þ Control voltage : 0 to 10VDC
þ Max. control current : 2.25mA at 12VDC
þ Control voltage and load are optically isolated
þ Isolated triac
þ Dimensions : 48x74mm (1.9”x2.9”)
modifications reserved
Applications :
þ Control power circuits with a safe DC voltage
þ Ideal for computer interfacing projects (with K8000)
þ Adjust lighting, speed of collector motors, …
þ Your own unique application
5%
4K7= ( 4 - 7 - 2 - B )
1%
4K7= ( 4 - 7 - 0 - 1 - 1 )
COLOR= 2… 5
I P E SF S DK N D GB F NL
C
O
D
E
CODICE
COLORE
CODIGO
DE
CORES
CODIGO
DE
COLORES
VÄRI
KOODI
FÄRG
SCHEMA
FARVE
KODE
FARGE
KODE
FARB
KODE
COLOUR
CODE CODIFI-
CATION
DES
COU-
LEURS
KLEUR
KODE
C
O
D
E
0
Nero Preto Negro Musta Svart Sort Sort Schwarz Black Noir Zwart 0
1
Marrone Castanho Marrón Ruskea Brun Brun Brun Braun Brown Brun Bruin 1
2
Rosso Encarnado Rojo Punainen Röd Rød Rød Rot Red Rouge Rood 2
3
Aranciato
Laranja Naranjado
Oranssi Orange Orange Orange Orange Orange
Orange
Oranje
3
4
Giallo Amarelo Amarillo Keltainen Gul Gul Gul Gelb Yellow Jaune Geel 4
5
Verde Verde Verde Vihreä Grön Grøn Grønn Grün Green Vert Groen 5
6
Blu Azul Azul Sininen Blå Blå Blå Blau Blue Blue Blauw 6
7
Viola Violeta Morado Purppura Lila Violet Violet Violet Purple Violet Paars 7
8
Grigio Cinzento Gris Harmaa Grå Grå Grå Grau Grey Gris Grijs 8
9
Bianco Branco Blanco Valkoinen Vit Hvid Hvidt Weiss White Blanc Wit 9
A
Argento Prateado Plata Hopea Silver Sølv Sølv Silber Silver Argent Zilver A
B
Oro Dourado Oro Kulta Guld Guld Guldl Gold Gold Or Goud B
__________________________________________________________________________________________________________________________________________________________
3
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 sol-
der 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 can-
not fly towards the eyes.
• Needle nose pliers, for bending leads, or to hold components 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 :
þ Make sure the skill level matches your experience, to avoid disappointments.
þ Follow the instructions carefully. Read and understand the entire step before you perform each operation.
þ Perform the assembly in the correct order as stated in this manual
þ Position all parts on the PCB (Printed Circuit Board) as shown on the drawings.
þ Values on the circuit diagram are subject to changes.
þ Values in this assembly guide are correct*
þ Use the check-boxes to mark your progress.
þ 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 :
Mount the component against the
PCB surface and carefully solder the
leads
Make sure the solder joints are
cone-shaped and shiny
Trim excess leads as close as pos-
sible to the solder joint
0.000
_______________________________________________________________________________________________________________________________________________________
4
1. RESISTORS
q R1 : 4K7 (4 - 7 - 2 - B)
q R2 : 100K (1 - 0 - 4 - B)
q R3 : 100K (1 - 0 - 4 - B)
q R4 : 470K (4 - 7 - 4 - B)
q R5 : 1M (1 - 0 - 5 - B)
Choose operating voltage :
For 24VAC :
q R6 : 15K (1 - 5 - 3 - B)
q R7 : 39K (3 - 9 - 3 - B)
For 110-125VAC :
q R6 : 100K (1 - 0 - 4 - B)
q R7 : 220K (2 - 2 - 4 - B)
For 220-240VAC:
q R6 : 220K (2 - 2 - 4 - B)
q R7 : 470K (4 - 7 - 4 - B)
2. DIODES
(Watch the polarity!)
CATHODE
D...
q D1 : 1N4148
q D2 : 1N4148
q D3 : 1N4007
3. CAPACITORS
C...
q C1 : 4n7 (472)
q C3 : 100nF/250VAC
(104 - µ1)
q C4 : 100nF (104 - µ1)
4. ELECTROLYTIC CAPACITORS
(Watch the polarity!)
C...
q C2 : 100µF
5. IC SOCKETS
q IC1 : 6P
q IC2 : 8P
__________________________________________________________________________________________________________________________________________________________
5
6. TRIM POTENTIOMETERS
RV...
q RV1 : 220K (250K)
q RV2 : 2M (2M5)
7. SCREW TERMINALS
q J1 : 2P
q J2 : 2 x 2P
8. POWER RESISTOR
R...
24VAC :
qR8 : 1K5 (1 - 5 - 2 - B)
R...
2mm
110-240VAC :
qR8 : 15K
9. MOUNTING OF THE TRIAC
10mm
M3 BOLT
M3
NUT
LOCK
WASHER
q TR1 : TRIAC
10. COIL
L...
q L1 : 50µH/6A
11. IC’s (Watch the position of
the notch)
q IC1 : 4N27 or eq.
q IC2 : TEA1007 or eq.
_______________________________________________________________________________________________________________________________________________________
6
12. CONNECTION EXAMPLE FOR RESISTIVE LOAD (FIG 1.0)
FUSEHOLDER
FUSE 4A T
MAINS
80W/24V
380W/110V
750W/240V
MAX
!
0 10
VDC -
+
CONNECTION EXAMPLE FOR INDUCTIVE LOAD (FIG 2.0)
FUSEHOLDER
FUSE 4A T
MAINS
0 10
VDC -
+
PRIM
SEC
!
500VA
MAX
CONNECTION EXAMPLE WITH K8000 COMPUTER INTERFACE (FIG3.0)
K8000
__________________________________________________________________________________________________________________________________________________________
7
R1
RV2
R3
MAX
R4
2
1
6
4
5
IC1
INPUT
VOLTAGE
CONTROL
+
-
D1
RV1
MIN
D2
R2
C2
C4
LOAD
D3
R8
R5
1
3
R6
5
L
MAINS
L
TR1
L1
TEA1007
6
8
7
IC2
C1
4
2
R7
C3
N
MAINS
13. SET UP
• Connect a digital voltmeter to the PCB in parallel with the load.
• Set both trimpots to the middle of the range of adjustment.
• Switch in the control voltage and the supply voltage.
• Set the control voltage to 0V.
• Adjust RV1 (Min) until the voltmeter reads 0V.
• Set the control voltage to maximum.
• Adjust RV2 (Max) until the voltmeter reads the maximum voltage.
• Repeat both adjustments once again.
• The circuit is now ready for use.
NOTE: In some cases it can be useful to set the minimum level such that
there is a small pre-voltage present, such as for example with stage and
theatre lighting.
14. PCB LAYOUT
15. DIAGRAM
_______________________________________________________________________________________________________________________________________________________
8
Modifications and typographical errors reserved
© Velleman Components nv.
H8003IP - 2002 - ED3
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Velleman K8003 is a compact and versatile DC controlled dimmer that provides precise control over lighting, motor speed, and other electrical devices using a safe DC voltage. With a maximum load capacity of 3.5A, it can handle up to 750W at 220V, 380W at 110V, and 80W at 24V, making it suitable for various applications. The optically isolated control voltage and load ensure safe operation, while the isolated triac further enhances safety. The K8003 is compatible with a wide range of control voltages from 0 to 10VDC, with a maximum control current of 2.25mA at 12VDC.
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