Velleman WST8089 Manuale utente

Total solder points: 263

Difficulty level: beginner 1 2 3 4 5 advanced

57mm 7-SEGMENT DIGITAL CLOCK

ILLUSTRATED ASSEMBLY MANUAL H8089IP-1

Large57mmclock & temperaturedisplay

withextra uniquefeature

K8089

VELLEMAN NV

Legen Heirweg 33

9890 Gavere

Belgium Europe

www.velleman.be

www.velleman-kit.com

Features & specifications

Features :

12/24h clock system

min temp readout:

• celsius: -20°C

• fahrenheit: -4°F

max temp readout:

• celsius: 70°C

• fahrenheit: 158°F

auto toggle function

easy time setting

easy wall mounting

back-up battery

automatic frequency detection

unique extra feature: auto toggle between time/temp and scrolling sign

'OPEN' or 'CLOSED'

Specifications

• power supply: 12VAC (e.g. PS1205AC)

• power consumption: 250mA max. (incl. temp. sensor*)

• backup battery: 3V (CR2032)

• power consumption on backup battery: +/-1mA

• dimensions: 230x74x32mm / 9 x 2.9 x 1.25"

* optional : temperature sensor K8067 or VM132

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 disappoint-

ments.

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

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

0.000

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 !

Construction

R1 : 100K (1 - 0 - 4 - B)

R2 : 10 (1 - 0 - 0 - B)

R3 : 22K (2 - 2 - 3 - B)

R4 : 22K (2 - 2 - 3 - B)

R5 : 240 (2 - 4 - 0 - 0 - 1)

R6 ... R37 : 220 (2 - 2 - 1 - B) !

R38 : 1K (1 - 0 - 2 - B)

R39 ... R42 : 10K (1 - 0 - 3 - B) !

R44 : 220 (2 - 2 - 1 - B)

R45 : 2K2 (2 - 2 - 2 - B)

R46 : 10K (1 - 0 - 3 - B)

1. Resistors.

R...

Hint: if you want the mount the clock against a wall, you can use the unstuffed

PCB as a template to mark the drill holes.

D1 : 1N4007

D2 : 1N4007

D3 : 1N4007

D4 : 1N4007

D5 : BAT85

D6 : BAT85

D7 : 1N4148

2. Diodes (check the polarity)

CATHODE

D...

ZD1 : 4V3

ZD2 : 4V3

ZD3 : 4V3

3. Zener diodes (check the polarity)

CATHODE

ZD...

Hint: resistors can be soldered at compo-

nent side of the board.

IC1 : 14p

IC2 : 16p

IC3 : 16p

IC4 : 16p

IC5 : 16p

4. IC sockets. Watch the position

of the notch!

IC...

C1 ... C11 : 100nF (104)

C13 : 100nF (104)

5. Capacitors

c...

SW1 : Open / closed

6. Switches

SW1.

Hint: mount a screw connector if remote

selection is needed, see step 12.

Construction

T1 : BC547

T2 : BC547

7. Transistors

VR1: UA7808

VR2: UA78L05

8. Voltage regulator

SW2 : Sign on/off

SW3 : Hours +

SW4 : Minutes +

10. Push buttons

E1 : CR2032 (3V)

9. Battery holder



SK1 : 2p power 12VAC

SK2 : 3p Temp. sensor

! If remote selection is needed :



SW1 :2p Open/closed

12. Terminal blocks

C12 : 470µF / 25V

13. Electrolytic capacitor.

Watch the polarity !

C...

VR...

IC1 : VK8089

(programmed PIC16F630-I/P)

IC2 : 74HC595

IC3 : 74HC595

IC4 : 74HC595

IC5 : 74HC595

15. IC's. Watch the position of the

notch!

2pins:

SK3 : 12h/24h

SK4 : °C/°F

SK5 : Clock/clock+temp

3pins:

hh:mm / hh.mm

11. Pinheaders

Make sure that the heat sink does

not touch C12 !

14. Heat sink

Construction

DY1 : 2 x 5pins

DY2 : 2 x 5pins

DY3 : 2 x 5pins

DY4 : 2 x 5pins

1. Tulip pin headers

MOUNT THESE COMPONENTS ON THE PCB SOLDERSIDE, SOLDER

THEM ON THE COMPONENTS SIDE

DY1DY2DY3DY4

5pins

Cut8x5pins

SOLDER SIDE

construction

CATHODE

DY1

DY2

DY3

DY4

Make sure that all displays are

correctly mounted !

2. Digit displays

ATTENTION: mount the displays so that the

dot is mounted towards the push button.

DY1DY2DY3DY4

Side with push buttons

3. Assembly of the enclosure

1 Mount the leds, watch the polarity.

display display

Construction

4. Test and connection

1. Power supply:

Supply 9-12VAC to the inputs marked '12VAC'.

Make sure supply can deliver 300mA

Make sure to use an AC power supply. If you supply a DC voltage, the

accuracy of the clock will be 5% worst case.

2. Back-up battery:

Insert a 3V CR2032 battery in the battery holder. If power

fails, unit will retain the clock. Display will remain blank.

Note: Accuracy when running on backup battery: 5%

worst case. Consumption: +/- 1mA

CHECK IF THE CLOCK IS WORKING CORRECTLY (see page 13)

5. Optional temperature sensor

If you have ordered an additional temperature sensor K8067

or VM132 then you can let the temperature automatic toggle

with the time and sign.

Connect the terminals marked GND, V+ and IN to the corresponding terminals of

the temperature sensor. As this is a current loop sensor, you can run several

meters of wire between the sensor and the clock.

Optional temperature sensor

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