velleman K8035 Advanced UP/DOWN Counter Installation Guide

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 6k09 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

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

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 possible to the solder joint

REMOVE THEM FROM THE TAPE ONE AT A TIME !

AXIAL COMPONENTS ARE TAPED IN THE CORRECT MOUNTING SEQUENCE !

Jumpers

J : 10x

Diodes. Watch the polarity !

D1: 1N4007
D2: 1N4007
D3: 1N4148

D4: 1N4148
D5: 1N4148
D6: 1N4148

D7: 1N4148

Zener diode. Watch the polarity !

ZD1 : 4V7

ZD2 : 4V

Resistors

R9 : 10K (1-0-3-B)

R10 : 10K (1-0-3-B)
R11 : 10K (1-0-3-B)
R12 : 10K (1-0-3-B)

R13 : 10K (1-0-3-B)
R14 : 2K2 (2-2-2-B)
R15 : 2K2 (2-2-2-B)

R16 : 2K2 (2-2-2-B)
R17 : 2K2 (2-2-2-B)
R18 : 4K7 (4-7-2-B)

R19 : 4K7 (4-7-2-B)
R20 : 10K (1-0-3-B)
R21 : 10K (1-0-3-B)

R22 : 10K (1-0-3-B)
R23 : 10K (1-0-3-B)
R24 : 10K (1-0-3-B)

R25 : 10K (1-0-3-B)
R26 : 10K (1-0-3-B)
R27 : 10K (1-0-3-B)

R28 : 390 (3-9-1-B)

Pushbuttons

SW1: KRS1243

SW2: KRS1243
SW3: KRS1243
SW4: KRS1243

Voltage Regulator.

VR1: UA7805

IC sockets. Watch the position of the notch!

IC1 : 28P
DY1 : 14P
DY2 : 14P

DY3 : 14P
DY4 : 14P

LED. Watch the polarity!

LD1 : 3mm Red.

Ceramic Capacitors

C1 : 18pF (18,18J)

C2 : 18pF (18,18J)
C3 : 100nF (104)
C4 : 100nF (104)

C5 : 100nF (104)
C6 : 1nF (102)
C7 : 1nF (102)

Transistors

T1 : BC557C
T2 : BC557C

T3 : BC557C
T4 : BC557C
T5 : BC557C

T6 : BC547
T7 : BC547

Resistors

R1 : 150 (1-5-1-B)
R2 : 150 (1-5-1-B)
R3 : 150 (1-5-1-B)

R4 : 150 (1-5-1-B)
R5 : 150 (1-5-1-B)
R6 : 150 (1-5-1-B)

R7 : 150 (1-5-1-B)
R8 : 150 (1-5-1-B)

Connector

DIP Switch

DS – 4

Quartz crystal

X1: 4,1943… MHz.

Electrolytic capacitor. Watch the polarity !

C8 : 470µF
C9 : 10µF

Display

SA39-11EWA

IC, Check the position of the notch !

IC1: VK8035 (Programmed PIC16C5

Connection

1	GND	6	GND
2	+ VA	7	+ 5V
3	+ VB	8	Count Down input (B)
4	GND	9	Count Up input (A)
5	E. OUT	10	GND

The grounds are internally connected.

E.out : 5V / 50mA max. output at “equal” pre-set value

Inspect the complete assembly once more before applying power to the unit !

Hook-up when using an adapter

Hook-up when using a transformer

Operation

When all connections are made, the four LED displays will light up and the Kit number will appear “8 0 3 5”after which following messages appear :

r x. x x	Version number
T E S T	Self-test is working
G O O D	Internal parts are working correctly

If an irregularity is found during the self-test, an error code will appear, when GOOD appears then the unit is ready for u

Error code	Description
Err. 2	Error in the keyboard section.
Err. 3	The switches are in the wrong position. ’DIP SWITCH’
Err. 4	Input A and B are at the same time active
Err. 5	Input A is active during self-test or input A is possibly malfunctioning.
Err. 6	Input B is active during self-test or input B is possibly malfunctioning.

The errors 5 & 6 can appears when during the self-test counter pulses are received, this can be reset by pressing SW4 briefly.

Counting pulses can be applied to the unit in two different ways :

+ 3V to 12V pulses with respect to ground.
Use the + 5V connection for push buttons or relay contacts when there is no power supply from an external source.

Press “Reset” button briefly to reset the readout. “0000”.
Press the “UP” button to increase the actual value with one.
Press the “DOWN” button to decreases the actual value with one.

Setting the Pre-set value:
It is possible to set a number which will continuously be compared with the content of the counter. If both are equal, then the output (Equal OUT) is activated.

Press Set/Run (set briefly appears).
Press Up or Down to set the value.

Press Set/Run to store the value (Run appears).

Counter settings :
The counter can be used for decade or modulo 60 (clock) counting, an internal oscillator can be provided for use in modulo 60-mode

1. COUNTER SETTINGS
FUNCTION	DIP SWITCH
FUNCTION	OFF	ON
Decade counter	1
Modulo 60 : hh:mm (23.59)	2	1
Modulo 60 : mm:ss. (59.59)		1 & 2
2. DEBOUNCE SETTING
Normal debounce	3
Long debounce		3
3. INPUT SETTING
External pulses	4
Internal oscillator		4

ATTENTION : When changing the position of one of the switches, the current counter value and the pre-set value will be erased. (0000)

PCB

Schematic diagram.

VELLEMAN Components NV
Legen Heirweg 33
9890 Gavere
Belgium Europe
www.velleman.be
www.velleman-kit.com

Documents / Resources

velleman K8035 Advanced UP/DOWN Counter [pdf] Installation Guide
K8035 Advanced UP DOWN Counter, K8035, Advanced UP DOWN Counter, UP DOWN Counter, DOWN Counter, Counter

References

User Manual

Features & Specifications

Assembly (Skipping this can lead to troubles ! )