Velleman K4305 Assembly instructions

Total solder points: 186
Difficulty level:
Beginner 1o 2þ 3o 4o 5o Advanced

K4305

2 x 10 LED STEREO VU METER

• For instant visualization of audio signal levels.

• Easy hook up to a LINE level ( LOW input) signal source.

• For use with mixing panels, amplifiers, CD players, radio’s, ...

• A special input (HIGH INPUT) is provided, which allows direct con-

nection to a SPEAKER* output .

• DOT or BAR display mode selectable to suit your application.

• Attractive display window supplied, which can be used both horizontal

as vertical.

• If wanted, the unit can be calibrated by means of a trim potentiometer.

*NOT SUITED FOR CONNECTION TO HIGH POWER CAR STEREO
SYSTEM

Specifications:

• 2 X 10 LED’s

• BAR OR DOT MODE

• INDICATION RANGE: 0dB = 0.775mVrms.

-20dB, -10dB, -7dB, -5dB, -3dB, -1dB, 0dB, +1dB, +2dB, +3dB

• FREQUENCY RANGE: 20Hz tot 30KHz

• LOW INPUT FOR 0dB: 150mV to 6Vrms (47K)

• HIGH INPUT FOR 0dB: 1.5V to 60Vrms (470K).

• POWER SUPPLY: 10 to 15VDC / 250mA max.

• PCB DIMENSIONS 2X: 68X37mm

modifications reserved

PARTLIST H4305P-ED1

5%

1

2

3

4

5

6

7

8

9

A

B

1%

COLOR= 2… 5

4K7= ( 4 - 7 - 2 - B )

4K7= ( 4 - 7 - 0 - 1 - 1 )

I P E SF S DK N D GB F NL

CODICE

C

COLORE

O
D
E

CODIGO

DE

CORES

CODIGO

DE

COLORES

VÄRI

KOODI

FÄRG

SCHEMA

FARVE

KODE

FARGE

KODE

FARB

KODE

COLOUR

CODE

CODIFI­CATION
DES
COU-

LEURS

KLEUR

KODE

0

Nero Preto Negro Musta Svart Sort Sort Schwarz Black Noir Zwart

Marrone Castanho Marrón Ruskea Brun Brun Brun Braun Brown Brun Bruin

Rosso Encarnado Rojo Punainen Röd Rød Rød Rot Red Rouge Rood

Aranciato Laranja Naranjado Oranssi Orange Orange Orange Orange Orange Orange Oranje

Giallo Amarelo Amarillo Keltainen Gul Gul Gul Gelb Yellow Jaune Geel

Verde Verde Verde Vihreä Grön Grøn Grønn Grün Green Vert Groen

C
O
D
E

0

1

2

3

4

5

Blu Azul Azul Sininen Blå Blå Blå Blau Blue Blue Blauw

Viola Violeta Morado Purppura Lila Violet Violet Violet Purple Violet Paars

Grigio Cinzento Gris Harmaa Grå Grå Grå Grau Grey Gris Grijs

Bianco Branco Blanco Valkoinen Vit Hvid Hvidt Weiss White Blanc Wit

Argento Prateado Plata Hopea Silver Sølv Sølv Silber Silver Argent Zilver

Oro Dourado Oro Kulta Guld Guld Guldl Gold Gold Or Goud

6

7

8

9

A

B

__________________________________________________________________________________________________________________________________________________________

ASSEMBLY STEPS

Required tools to assemble the kit:

A small soldering iron of max. 40W.
Thin (1mm) solder, do not use any flux.
A small cutter to trim the excess wires.

1.

Mount the compo­nents against the
PCB surface and
carefully solder the
leads.

2.

Obtain cone- shaped,
shiny soldered joints
by heating the com­ponent leads suffi­ciently.

3.

This solder joint
results in a bad
connection.

4.

Trim the excess
wires up to the
level of the sol­der

• Careless assembly will certainly lead to troubles.

• Insert the part, oriented correctly, into its correct holes on the PCB.

• Mount the components in the correct order as stated in this manual.

• The component values in the diagram are for reference only. The val-

ues in this partlist are correct and must be followed.

• Use the boxes q to tick off your progress.

F Before starting to build, also read the general guidelines

3

_______________________________________________________________________________________________________________________________________________________

Assembly

Mount all components onto the PC boards (mount the two boards)

1. JUMPERS

q J1
q J2, mount for BAR mode, do

not mount for DOT mode.

BAR DOT

2. DIODES (Check the polarity)

D...

CATHODE

q D1: 1N4148
q D2: 1N4148
q D3: 1N4000… 1N4007

3. ZENER DIODES
(Check the polarity)

+3

+2
+1
0dB

-1

-3

-5

-7

-10

-20

+3

+2
+1
0dB

-1

-3

-5

-7

-10

-20

ZD...

CATHODE

q ZD1: 6,2V (6V2)

4

__________________________________________________________________________________________________________________________________________________________

4. ¼W RESISTORS

R...

q R1: 47K (4-7-3-B)
q R2: 47K (4-7-3-B)
q R3: 330 (3-3-1-B)
q R4: 10K (1-0-3-B)
q R5: 10K (1-0-3-B)
q R6: 2K2 (2-2-2-B)
q R7: 470K (4-7-4-B)

5. IC SOCKETS

(Check the position of the notch)

6. RESISTOR TRIMMERS

RV...

q RV1: 220K (250K)

7. CAPACITORS

C...

q C1: 220nF (0.22µF, 224)
q C2: 220nF (0.22µF, 224)

1

q IC1: 8P
q IC2: 18P

IC...

8. ELECTROLYTIC CAPACITOR

(Check the polarity)

C...

+

q C3: 47µF
q C4: 47µF
q C5: 47µF

5