Velleman-Kit K8071 User manual

1W / 3W POWER LED DRIVER
K8071
ILLUSTRATED ASSEMBLY MANUAL H8071IP
Total solder points: 62
Difficulty level: beginner 1 2 3 4 5 advanced
Poweruptofour1Wortwo3W
high-powerLEDs.
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VELLEMAN NV
Legen Heirweg 33
9890 Gavere
Belgium Europe
www.velleman.be
www.velleman-kit.com
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Features:
delivers accurate constant current required by most high-power LEDs
high efficiency due to switch mode principle
built-in rectifier for easy connection to AC source
compact size
short-circuit protected
no heatsink required
also suited as fixed current NiCd/NiMH battery charge circuit
for home, disco, stage, education, architectural lighting, science projects, ...
Specifications:
350mA or 700mA constant current source
input voltage: 6..12VAC / 9-18VDC
power consumption: 650mA max.
dimensions: 45x30x16mm / 1.8x1.2x0.64"
Features & Specifications
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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 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 :
 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 drawings.
 Values on the circuit diagram are subject to changes, the values in this assembly guide are correct*
 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.
0.000
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
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DO NOT BLINDLY FOLLOW THE ORDER OF THE COMPONENTS ONTO THE TAPE.
ALWAYS CHECK THEIR VALUE ON THE PARTS LIST!
REMOVE THEM FROM THE TAPE ONE AT A TIME !
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R6 : 1 (1 - 0 - B - B - 9)
If 700mA output is desired,
mount R7 :
R7 : 1 (1 - 0 - B - B - 9)
1. Metal film resistors
R...
Construction
D5 : SB130
D...
CATHODE
R1 : 30K (3 - 0 - 0 - 2 - 1)
R2 : 2K2 (2 - 2 - 0 - 1 - 1)
R5 : 2K2 (2 - 2 - 0 - 1 - 1)
5. Vertical metal film resistors
R...
IC1 : 8P
3. IC sockets, Watch the
position of the notch!
C1 : 100nF (104)

C2 : 100nF (104)

C3 : 100nF (104)

C4 : 68pF (68)
4. Capacitors.
C...
R3 : 100 (1 - 0 - 1 - B)
R4 : 1K (1 - 0 - 2 - B)
6. Vertical resistors
R...
T2 : BC547B
T3 : BC557B
Bend transistor
T2 away from
IC socket IC1.
7. Transistors.
T2
2. Schottky diode. Watch the
polarity!
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Construction
VR1 : UA78L05
8. Voltage regulator
C5 : 10µF/35V
C6 : 470µF/25V
Bend the electrolytic capacitor
away from diode D1.
11. Electrolytic Capacitor.
Watch the polarity !
C.. .
D1 : 1N4007
D2 : 1N4007
D3 : 1N4007
D4 : 1N4007
9. Diodes. Watch the polarity!
D1
CATHODE
AC (2x)
- (C)
+ (A)
10. PCB tabs
C..
+
L1 :330µH / 1A
12. Coil
L...
T1 : IRF9520
14. Power Mosfet T1
IC1 : LM393
13 IC. Watch the position of
the notch!
Bend the power
mosfet toward IC1
VR...
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Connection
15. Connection
+ - +
-
+ - +
-
- + -
+
Maximum 4 x 1W power LED
+
-
+
-
6 - 14VAC
or
9 - 18VDC
Maximum 2 x 3W power LED
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16. Schematic diagram.
Schematic diagram
IO
GND
VR1
UA78L05
SK2
-
SK1
+V
C6
470µF/25V
C1
100n C5
10Á
GND GND GND
D1
GND
R1
30K 1% R2
2K2 1%
GND
+V
Vref
GND
D2
D3 D4
1N4007
SK4
C (-)
SK3
A (+)
+V
GND
L1
330µH
R6
GND
R5
2K2
C4
68p
GND
R4
1K
+V
R3
100
Vref
5
6
7
IC1B
T1
T2
BC547
T3
BC557
+V
GND
D5
1N5822
R7
C2 100n
GND
1E0
0,6W
1E0
0,6W
3
2
8
4
1
IC1A
LM393
GND
+V
C3
100n
GND
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PCB
17. PCB
R4
R3
R2
R1
IC1
D5
C4
C5
C3
C1
C6
D1
R7 T3
T2
VR1
T1
R6
D2
D3
C2
R5
D4
650mA max.
input:
L1
Velleman
AC
P8071'2
AC
AC
6-14VAC
9-18VDC
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Modifications and typographical errors reserved - © Velleman nv, Legen Heirweg 33 - 9890 Gavere (België)
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