Velleman K8046 User manual

TOUCH SCREEN
K8046
ILLUSTRATED ASSEMBLY MANUAL H8046IP-2
Total solder points: 274
Difficulty level: beginner 1 2 3 4 5 advanced
Createyourownkeyboardwithyour
personallayout&symbols.

3
CAUTION:
This kit is supplied with a GLASS type keyboard.
BE VERY GENTLE WITH THIS TYPE OF
KEYBOARD, THE SLIGHTEST BENDING WILL BREAK THE GLASS AND COULD CAUSE
INJURY.
A BROKEN KEYBOARD IS NOT COVERED BY THE
WARRANTY, A NEW KEYBOARD CAN BE ORDERED AT YOUR DEALER.
ORDER CODE: KB020501
IMPORTANT: Since this is a complex assembly with a lot of possibilities, it is advisable to
read through the complete instructions BEFORE starting the actual assembly.
BE WARNED !
!

4
Specifications:
 LED status indication for each key/output
 Each key can be defined as toggle or momentary
 Soft touch, see-through touch panel with 8 keys
 Backlight with dim function
 Unique key-click feedback
 4 different functions (jumper selectable) :
• Eight independent keys (toggle or momentary selectable)
• Eight radio (rotary simulation) buttons
• Four radio buttons and 4 independent keys
• One key serves as a memory for 7 other keys or “clear all” key fitted.
Features:
 8 open collector switches: max 50 Volt / 50mA (all outputs)
 Board to wire connectors: 20cm wire.
 Dimensions (including frame): 165x90x35 (depth)
 Usable temperature range: -5°C to +40°C
 Keyboard operating force: 40g. (with R0.8mm test point)
 Keyboard lifetime: 1.000.000 operations with R3mm rubber
 Power supply: 2 x 9VAC or 12VDC / 250mA max.
Options :
 Optional infrared receiver module: IR38DM
 Optional BLUE BACKLIGHT: L-934MBC (8pcs required)
Features & Specifications

5
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 !
AXIAL COMPONENTS ARE TAPED IN THE COR-
RECT MOUNTING SEQUENCE !

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Construction
 D9 : 1N4148
 D10 : 1N4007
 D11 : 1N4007
 D1 to D8 are not mounted at
this time.
1. Diodes. Watch the polarity !
D...
CATHODE
 ZD1 : 5V6 - 1/2W
 ZD2 : 5V6 - 1/2W
 ZD3 : 5V6 - 1/2W
 ZD4 : 5V6 - 1/2W
 ZD5 : 5V6 - 1/2W
 ZD6 : 5V6 - 1/2W
2. Zenerdiodes. Watch the
polarity !
CATHODE
ZD...
 R1 : 680E (6 - 8 - 1 - B)
 R2 : 680E (6 - 8 - 1 - B)
 R3 : 680E (6 - 8 - 1 - B)
 R4 : 680E (6 - 8 - 1 - B)
 R5 : 680E (6 - 8 - 1 - B)
 R6 : 680E (6 - 8 - 1 - B)
 R7 : 680E (6 - 8 - 1 - B)
 R8 : 680E (6 - 8 - 1 - B)
 R9 : 10K (1 - 0 - 3 - B)
 R10 : 10K (1 - 0 - 3 - B)
 R11 : 10K (1 - 0 - 3 - B)
 R12 : 1K5 (1 - 5 - 2 - B)
 R13 : 10K (1 - 0 - 3 - B)
 R14 : 1K5 (1 - 5 - 2 - B)
A. ASSEMBLY OF THE MAIN PCB P8046B
3. Resistors
R...
 R15 : 100K (1 - 0 - 4 - B)
 R16 : 100K (1 - 0 - 4 - B)
 R17 : 100K (1 - 0 - 4 - B)
 R18 : 100K (1 - 0 - 4 - B)
 R19 : 120E (1 - 2 - 1 - B)
 R20 : 1K5 (1 - 5 - 2 - B)
 IC1 : 28p
 IC2 : 18p
4. IC sockets. Watch the
position of the notch !

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Construction
 C1 : 22pF (22)
 C2 : 22pF (22)
 C3 : 100nF (104)
 C4 : 100nF (104
 C5 : 100nF (104)
5. Capacitors.
C...
 SW1 : RESET

SW2 : BACKLIGHT
Type : KRS1273
6. Push buttons
 VR1 : UA7805
7. Voltage regulator
M2.5 SPACER
 SK3 : 3p
 SK5 : 10p
8. Connectors
 SK8 : 10p
CUT BETWEEN
PIN 10 & 11
 SK4 : 6p
9. Membrane keyboard
connector
ZD6
ZD5
R18 R17
ZD4 ZD3
R16 R15
ZD2
ZD1
1
VOLTAGE REGULATOR
M2,5 BOLT
WATCH THE POSITION OF THE
CONNECTION
M2,5 6mm SPACER

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Construction
 C6 : 10µF
 C7 : 100µF
13. Electrolytic Capacitors.
Watch the polarity !
 SK1 : 2p
 SK2 : 2p
16. Pin headers
 T1 : BC557B
 T2 : BC547B
10. Transistors
C...
Power indication, make your
choice as you prefer:
 LD17 : 3mm green clear
OR
3mm red
11. LED. Watch the polarity!
LD1
CATHODE
 X1 : 4MHz
12. Quartz crystal
X...
 RY1 : VR15M121C
14. Relay
RY...
15. IC's. Watch the position
of the notch!
 IC1 : VK8046
Programmed PIC16C55A-04 ! or eq.
 IC2 : ULN2803
PIN 1
1
SK1
SK2
27mm

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Keyboard set-up
Each key is function definable (moment or toggle) and backlit. It is even possible to simulate old fashioned
“radio buttons” (only one output can be ON, just like a rotary switch).
One key can be defined as a pre-set memory or serve as “all clear”.
The K8046 features 4 operating modes, selectable with shunt SK1 or SK2 :
1. Eight independent keys (toggle or momentary selectable).
2. Eight radio (Rotary simulation) buttons.
3. Four radio buttons and 4 independent keys.
4. One key is reserved as memory or “clear all” function.
Momentary (push button-) function : Hold the key to activate the output and release the key to deactivate it.
Toggle function : Operates according to the principle of a classic switch, i.e. you have to press the key once
to switch and press again to deactivate it.
17. KEYBOARD SET-UP
MODE SK1 SK2
1 OFF OFF
2 OFF ON
3 ON OFF
4 ON ON
SHUNT SELECTION

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For each output :
If a momentary output is needed, DO NOT mount a diode for the corresponding output D1 to D8.
If a toggle output is needed, MOUNT a diode for the corresponding output D1 to D8.
JUMPER SELECTION
Different possibilities in conjunction with diode setup:
1. Eight indepent keys (no jumper is mounted) toggle or momentary selectable see
previous page.
2. Eight radio ( Rotary simulation) buttons, only one button (output) at a time can be
ON. Again with possibility of momentary or toggle.
Normally a toggle function will be used for this type of output.
Keyboard set-up
D...
CATHODE
Diode type: 1N4148.
Check the polarity !
SK2
SK1
SK1
SK2

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Keyboard set-up
3. Four radio buttons and 4 independent keys.
This is a combination of above. The first row (1 to4). Are independent buttons, the second
row (5 to 8) have a rotary simulation.
4. Key 8 is reserved as memory or ‘Clear all’ Function.
If D8 is mounted this key will switch between all clear and memory of the previous keyboard
setting.
If D8 is NOT mounted, this key will serve as all clear.
SK1
SK2
SK1
SK2
HINT: the separate CLEAR button can also be used as keyboard clear function.
This key will actually reset the processor.

13
IR detector
It is possible to use the keyboard together with a remote control (e.g. our K8049 & K8051). In this case an
optional receiver module type IR38DM is available.
A special cut-out in the front panel has to be made, see figure 1.0.
18. Optional IR detector
Fig 1.0

14
3
Fig 2.0
2
1
Position the module like in the drawing. Use some hot glue to hold the receiver in place on the relay (Fig 2.0)
Make the connections:
Connect 1 with right side of R13
Connect 2 with COM connection of the output connector
Connect 3 with left connection of R20. See picture.
IR detector

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2. Spacers for keyboard support
Construction
 R21 : 180E (1 - 8 - 1 - B)
 R22 : 180E (1 - 8 - 1 - B)
 R23 : 180E (1 - 8 - 1 - B)
 R24 : 180E (1 - 8 - 1 - B)
 R25 : 180E (1 - 8 - 1 - B)
 R26 : 180E (1 - 8 - 1 - B)
 R27 : 180E (1 - 8 - 1 - B)
 R28 : 180E (1 - 8 - 1 - B)
B. ASSEMBLY OF BACKLIGHT PCB P8046L
1. Resistors
R...
Fig 3.0
 Mount six 8mm M2,5 spacers at the indicated
positions using six 6mm M2,5 screws (Fig 3.0).

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Output status indication
 LD1 : 3mm Red
 LD2 : 3mm Red
 LD3 : 3mm Red
 LD4 : 3mm Red
 LD5 : 3mm Red
 LD6 : 3mm Red
 LD7 : 3mm Red
 LD8 : 3mm Red
3. Output status indications
Max. 7mm
 HINT: if not all keys/outputs are used, do not mount a LED for the not used key/output.

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• Cut of a piece of shrinking tube with a length equal to 7mm.
• Slide the shrinking tube over each LED. (Fig 4.0)
Fig 4.0
Output status indication

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LED’s for backlight
IMPORTANT
Mount these LED’s exactly
like in the drawings.
4. LED's for backlight
LD...
Anode
L-934GC
First: Bend the leads exactly like the drawing (Fig 5.0).
Next: Solder one lead, and check the position, if necessary correct by heating
the soldering (Fig 6.0).
Last: Solder the second connection.
 LD9 : 3mm Green clear
 LD10 : 3mm Green clear
 LD11 : 3mm Green clear
 LD12 : 3mm Green clear
 LD13 : 3mm Green clear
 LD14 : 3mm Green clear
 LD15 : 3mm Green clear
 LD16 : 3mm Green clear
MAX.7mm
MAX 7mm!
Fig 6.0
TIP
Blue backlight is possible using
special LED’s (8pcs required).
Ordernr. : L-934MBC
Fig 5.0

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Backlight connection
5. Header for backlight PCB connection
10
Fig 7.0 Fig 8.0
10!
10!
Fig 9.0
Place the header at position SK9
(Fig 8.0).
Cut the header to use 10pins
(fig 7.0).
Solder the header (fig 9.0)
Solderside

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Test assembly
 Mount the four 15mm spacers as shown in the drawing using four 6mm bolts (Fig 10).
6. Assembling (for testing)
Fig 10