Velleman K8088 User manual

RGB Controller
K8088
ILLUSTRATED ASSEMBLY MANUAL H8088IP-1
Total solder points: 117
Difficulty level: beginner 1 2 3 4 5 advanced
Controlincandescentbulbs,LEDs,
commonanodeledstrips,etc...
Specifications
 256 intensity levels/ch.
 voltage output : same as input voltage
 current limit possible (on-board resistor needed)
 LED PWM freq. : 82Hz
 power supply : 10 - 15Vdc / 9A max.
 dimensions : approx 80x70x23mm

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Features:
 suited for both incandescent bulbs and LEDs
 up-down level adjust for each output
 hard transition effects : runnning light, Strobo, Colour loops, etc...
 smooth fade effects : colour change, flame effect, random colours, slow off etc...
 wide-range effect speed adjust
 Hi power MOSFET outputs
 memory for last selected effect & speed
 easy up/down effect select
 suited for common anode RGB strips
Specifications:
 256 intensity levels/ch.
 voltage output : same as input voltage
 current limit possible (on-board resistor needed)
 LED PWM freq. : 82Hz
 power supply : 10 - 15Vdc / 9A max.
 dimensions : approx 80x70x23mm
Features & Specifications
Ideal for use with flexible LED light lights strips, ex. RGB Led. (ordernr. LDB1-HS3027AC)

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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.
⇒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.
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Assembly hints
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 !
DO NOT BLINDLY FOLLOW THE ORDER OF THE
COMPONENTS ONTO THE TAPE. ALWAYS CHECK
THEIR VALUE ON THE PARTS LIST!

5
 R1 : 330 (3 - 3 - 1 - B)
 R2 : 330 (3 - 3 - 1 - B)
 R3 : 330 (3 - 3 - 1 - B)
R4,R5 & R6 : see page 9 &10
 R7 : 180 (1 - 8 - 1 - B)
 R8 : 390 (3 - 9 - 1 - B)
 R9 : 1K (1 - 0 - 2 - B)
 R10 : 47K (4 - 7 - 3 - B)
2. Resistors
R...
Construction
 D1 :1N4007
CATHODE
3. Diode. Watch the polarity!
 J
1. Jumper wire
 RA1 : 10K (103)
4. Resistor array
!
1
 IC1 :14p
5. IC socket. Watch the
position of the notch!
D...
 C1 : 100nF (104)

C2 : 100nF (104)

C3 : 100nF (104)
 C4 : 15pF (15)
 C5 : 15pF (15)
6. Capacitors.
C...
 SW2 : Blue up
 SW3 : Green up
 SW4 : Red up
 SW5 : Red down
 SW6 : Green down
 SW7 : Blue down
7. Push buttons
SW...

6
 C6 : 100µF / 25V
11. Electrolytic Capacitor.
Watch the polarity !
C...
 SW1 : ON / OFF
 SW8 : RGB / effect -mode
8. Switches
SW1.
construction
 VR1 : UA78L05
9. Voltage regulator
VR...
 SK1 : 2p "12Vdc"
 SK2 : 2p "Red"
 SK3 : 2p "Green"
 SK4 : 2p "Blue"
10. Terminal blocks

X1 : 20MHz
12. Crystal
X...

7
Construction
 LD1 : 3mm Red "R"
 LD2 : 3mm Green "G"
 LD3 : 3mm Blue "B"
COLOR= 2...5
LD...
CATHODE
12. LEDs. Watch the polarity!
17mm
14mm
 TR1 : BUK9535-55
 TR2 : BUK9535-55
 TR3 : BUK9535-55
13. Transistors
14mm
 IC1 : VK8088
(programmed PIC16F630-I/P)
14. IC
IMPORTANT
Apply an extra layer of
solder on all copper
PCB tracks.

8
Description
Description
1) On/off switch
2) Mode switch. Select between ‘RGB’- and ‘Effect’-mode
‘RGB’-mode: Red, Green and Blue output levels can be
individually adjusted by means of the up/down buttons
‘Effect’-mode: Allows to choose between 11 built-in effects
3) Output indicator leds.
4) Power supply connector.
5) RED output (3A DC max.)
6) GREEN output (3A DC max.)
7) BLUE output (3A DC max.)
8) RED-level down / ‘previous effect’-button
9) RED-level up / ‘next effect’-button
10) GREEN-level down / ‘reduce effect speed’-button
11) GREEN-level up / ‘increase effect speed’-button
12) BLUE-level down / ‘previous colour’-button
13) BLUE-level up / ’next colour’-button
3
7654
1
9
8
8
10
12
2
11
13

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Connection
Connection
Incandescent lightbulb or halogen lightbulb:
connect the lightbulb to the output R, G or B.
Place a wire jumper for R4, R5 and R6.
 Polarity is not important. 3A /channel max (36W@12V).
LED-strip with common anode (+) :
Connect the common anode to the (+) of the 12VDC power supply.
Connect the cathode (-) of each colour to the (-) of R,G or B on the K8088.
Place a wire jumper for R4, R5 and R6.
 Max. current consumption is 3A/channel.
12VDC
- +
12VDC
- +
COM
Anode R G B

10
LED:
 LEDs require a series resistor (R4, R5 or R6)
Determine led voltage drop (Check manufacturer datasheet).
Rule of thumb: red: 1.7V, green: 2V, blue: 3..4V).
Next, check required LED current.
Example:
Red LED, 1.7V drop, required current: 20mA
Resistor calculation: (12V-1.7V) / 0.020 = 515 ohm (choose nearest value,
e.g. 560 ohm)
Resistor power rating calculation: (12V-1.7V) x (12V-1.7V) / 560 = 0.19W
(choose a 0.25W resistor)
Connection
12VDC
- +
C (-)
A (+)

11
Use
Use
RGB-mode (mode switch into position ‘RGB’)
This mode allows you to compose a desired colour by adjusting the level of each channel.
8) RED-level down
9) RED-level up
10) GREEN-level down
11) GREEN-level up
12) BLUE-level down
13) BLUE-level up
Memory: Once you have composed a colour, you can store it in memory by flipping the mode switch to ‘eff'. Next time,
when you turn on the controller with the slide switch set to ‘RGB’, it will revert to the colour you’ve composed.

12
Effect-mode (mode switch SW8 in position ‘eff’)
This mode allows you to select one of the 11 available effects, using the buttons (8) and (9)
Effects 2 to 11 feature adjustable speed. Press (11) to increase speed, press (10) to decrease speed
Memory: Once you have selected an effect and the desired speed, you can store it in memory by flipping the mode
switch to ‘RGB'. Next time, when you turn on the controller with the slide switch set to ‘eff’, it will revert to the effect you’ve
selected
Effect # Description
1 Static colours Select a static colour by means of buttons (12) and (13).
Colours: Red - Green - Red/Green - Blue - Red/Blue - Green/Blue - Red/Green/Blue
2 Sequenced colours Same as above, but automatically sequenced
3 Sequenced pri mary colours Red - Green - Blue sequencer
4 Colour fade Fade Red-Green-Blue-Red
5 Flame effect 3 independent flame simulations
6 Strobo 3 outputs blink with 50% duty cycle
7 Random colours Random colours, hard transistions between colours
8 Random colours Random colours, soft transitions between colours
9 Random flashes Random colours, fade 0 -> 100% -> 0
10 Nightlight All channels 100%, next, slow off all channels, finally Blue remains at 10%
11 Traffic light Green, Blue, Red, Green sequence. Use Blue output for yellow light
Use

13
Mounting order overview
Mounting order overview
Mount the PCB onto the lower part of the housing, see figure.
Place the front and rear sticker on the housing.

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Schematic diagram.
Schematic diagram
SK1
SCREW02
SK2
B
C1
100n
C2
100n
C3
100n
I O
GND
VR1
UA78L05
GND GNDGND GND
+5V
+12V
RA5 /T1CKI /OSC1/CLKIN 2
RA3/MCLR/Vpp
4
RC5
5
RC4
6
RC3
7
RA4/T1G/OSC2/CLKOUT 3
RA0 /CIN+ /I CSPDAT 13
RA1 /CIN- /I CSPCLK 12
RA2/COUT/T0CKI/INT 11
RC2
8
RC1
9
RC0
10
VDD 1
VS S
14
IC1
PIC16F630-I /P
+5V
GND
GND
R6
Rb
+12V
GND
R3
330
SK3
G
R4
Rg
+12V
GND
R1
330
SK4
R
R5
Rr
+12V
GND
R2
330
+5V
RA1
RESI STOR A RRA YA8C10K
GND
R9
1K
R7
180
R8
390
LD2
BLU E
LD3
GREEN
LD1
RED
GND
GND
GND
GND
SW8
R1 0
47K
+5V
C6
100µ/25V
D1
1N4007
C5
15p
C4
15p
GND GND
X1
20MHz
SW1
SW2 SW3 SW4 SW5 SW 6 SW7
T3
IRF540
T2
IRF540
T1
IRF540
SK4
B
SK3
G
SK2
R
LD2
LD1
BUK9535-55
BUK9535-55
BUK9535-55
390
180

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PCB
PCB

5 410329 385606
Modifications and typographical errors reserved - © Velleman nv. H8088IP'1 - 2008 (rev.1)