Total solder points: 271 Difficulty level: beginner advanced. 2 x 15 LED STEREO VU METER K4306 ILLUSTRATED ASSEMBLY MANUAL
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1 Total solder points: 271 Difficulty level: beginner advanced 2 x 15 LED STEREO VU METER K4306 For high precision audio level indication ILLUSTRATED ASSEMBLY MANUAL H4306IP-1
2 Features & Specifications Features: For visualization of audio signals. Use with mixing panels, amplifiers, car audio systems Easily connects to the line-level output (LOW INPUT) from any tape deck, stereo system, or CD player. A special input (HIGH INPUT) is provided, so that the unit can directly be connected to the speaker output of most systems*. To make it universal, the readout can be set as DOT or BAR indication. The supplied display window for vertical or horizontal mounting, makes the unit very attractive. Specifications: Bar or dot readout. Scale: -23dB to +5dB, 15 LED s per channel. db-linear division from -4 to +5dB (1dB per led). Systematically growing steps below -4dB. Accuracy: ±0.5dB (1KHz). Frequency range: 20Hz to 30KHz (-3dB). Three different LED colors: green, orange and red. Adjustable input sensitivity: 150mV to 5Vrms Low input 1.5V to 50Vrms High input Input impedance: 47K Low input / 470K High input Power supply: 12 to 15VDC / 300mA Dimensions: 150 x 57mm 2 NOT SUITED FOR CONNECTION TO HIGH POWER CAR STEREO SYSTEM
3 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 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. 3
4 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! 4
5 -8-8 Construction 1. Jumper wires BAR readout : BAR DOT JB1 JB2 JB3 JB4 Left Right Left Right J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J11 DOT readout : JD1 JD2 +1 0dB dB
6 Construction 2. Diodes. Watch the polarity! CATHODE D1 : 1N4148 D2 : 1N4148 D3 : 1N4148 D4 : 1N4148 D5 : 1N4148 D6 : 1N4148 D7 : 1N4148 D8 : 1N4148 D9 : 1N4007 D Zenerdiode. Watch the polarity! 4. Metal film resistors 5. Resistors R... R1 : 3K ( ) R2 : 3K9 ( ) R3 : 3K ( ) R4 : 3K9 ( ) R... R10 : 47K ( B) R11 : 2K2 ( B) R12 : 18K ( B) R13 : 18K ( B) R14 : 2K2 ( B) R15 : 1K ( B) R16 : 1K ( B) R17 : 2K2 ( B) R18 : 2K2 ( B) R19 : 2K2 ( B) R20 : 330 ( B) 6. IC sockets. Watch the position of the notch! CATHODE ZD1 : 6V2 ZD... R5 : 470K ( B) R6 : 47K ( B) R7 : 47K ( B) R8 : 470K ( B) R9 : 47K ( B) IC1 IC2 IC3 IC4 IC5 IC6 : 8p : 8p : 18p : 18p : 18p : 18p 6
7 Construction 7. Capacitors. C Electrolytic Capacitors. Watch the polarity! 11. LEDs. Watch the polarity! C... - LD... 23mm 0.9" 13mm C1 : 220nF (224) C2 : 220nF (224) C3 : 220nF (224) 8. Trim potentiometers RV1 : 220K RV2 : 220K C4 : 470µF C5 : 47µF C6 : 47µF C7 : 470µF 10. 1W resistors R... 2mm R21 : 47 ( B ) R22 : 47 ( B ) CATHODE LD1 : green LD2 : green LD3 : green LD4 : green LD5 : green LD6 : green LD7 : green LD8 : green LD9 : green LD10 : green LD11 : green LD12 : green 7
8 Construction LD13 : green LD14 : green LD15 : green LD16 : green LD17 : green LD18 : green LD19 : green LD20 : green LD21 : yellow LD22 : yellow LD23 : yellow LD24 : yellow LD25 : red LD26 : red LD27 : red LD28 : red LD29 : red LD30 : red 12. IC s. Watch the polarity! IC1 : 741 IC2 : 741 IC3 : LM3916 IC4 : LM3916 IC5 : LM3916 IC6 : LM3916 8
9 Assembly 13. Assembly Ø (A) Make the holes in the housing or panel (fig.1.0) : 7 6mm M3 COUNTERSUNK-HEAD BOLT Fig. 1.0 (B) Mount the suitable spacers (fig. 2.0) : 10mm M3 SPACER LOCK WASHER 6mm M3 COUNTERSUNK-HEAD BOLT 2...3mm FRONTPANEL SHAKEPROOF WASHER 10mm M3 SPACER Fig
10 Assembly (C) Mount the PCB onto the spacers (fig 3.0) : 4mm M3 BOLT Fig mm M3 COUNTERSUNK-HEAD BOLT 2...3mm FRONTPANEL SHAKEPROOF WASHER 10mm M3 SPACER PCB 4mm M3 BOLT 10
11 Connection 14. Connection to a suitable signal Connecting to a line level output (tuner, preamplifier, cd player ) and connecting a power supply from 12 to 15VDC / 300mA max.. TAPE L OUT R FROM AUDIO AMPLIFIER HI LEFT LO LO HI RIGHT K4306 MAINS MAINS 1N V/300mA 12V/300mA 1N V/300mA uF/25V uF/25V VDC POWER SUPPLY Fig. 4.0 Connect the unit to a suitable supply voltage between 12VDC and 15VDC, this can also be a standard DC adapter. You can also build your own power supply, see diagram. Use a 2x12V transformer, two rectifier diodes and a electrolytic capacitor or use a single 12V transformer with a bridge rectifier and a electrolytic capacitor. 11
12 Connection 15. Connection to a speaker output Connecting to a speaker level output and connecting a power supply from 12 to 15VDC / 300mA max. L+ LEFT SPEAKER L- INPUT (0) R- RIGHT SPEAKER R+ FROM POWER AMPLIFIER HI LEFT LO LO HI RIGHT K4306 MAINS MAINS 1N V/300mA 12V/300mA 1N V/300mA uF/25V uF/25V VDC POWER SUPPLY Fig. 5.0 Connect the unit to a suitable supply voltage between 12VDC and 15VDC, this can also be a standard DC adapter. You can also build your own power supply, see diagram. Use a 2x12V transformer, two rectifier diodes and a electrolytic capacitor or use a single 12V transformer with a bridge rectifier and a electrolytic capacitor. 12
13 Connection 16. Connection to a car radio Connecting to a speaker output from a regular car radio. LEFT SPEAKER R- RIGHT SPEAKER R+ CAR RADIO L+ L- +12V ANTENNE POWER OUT Fig. 6.0 HI LO LEFT LO HI RIGHT K4306 REMARK: Do not connect the unit to a high power car booster or car stereo, this equipment uses isolated ground connection. The connection to this kind of amplifier can cause permanent damage to the amplifier or car radio! Adjust the units sensitivity according to your preference by means of the trim potentiometer RV1 13
14 PCB 17. PCB LAYOUT 14
15 15 Diagram HIGH IN GND C1 220n R5 470K RV1 220K R9 47K UA741 IC D2 1N4148 D1 1N4148 R R1 3K C5 47u 6V2 ZD1 C7 470u 5 4 SIG RLO 6 RHI REF 7 R14 2K2 ADJ V+ V- LD dB LD5-10dB 17 LD7-8dB 16 LD9-6dB 15 LD11-4dB 14 LD13-3dB 13 LD15-2dB 12 LD17-1dB 11 LD19 0dB 10 LD1-23dB 1 + GND D9 1N4007 C4 470u C3 220n IC4 LM VDC +3dB LD25 RED DOT/BAR 2 V- 1 LM ADJ REF RHI RLO SIG IC LD23 YELLOW LD21 YELLOW 14 +1dB dB 3 MODE 9 LD29 RED LD27 RED dB V+ +5dB JB3 D5 1N4148 D6 1N4148 R15 1K MODE 9 R2 3K9 R17 2K2 R19 2K2 R21 47/1W DOT/BAR JD2 JB2 UA741 IC2 D3 1N4148 R4 3K9 R3 3K GND LOW IN RV2 220K R10 47K R7 47K C2 220n 3 2 D4 1N DOT/BAR JB1 DOT/BAR R22 47/1W R13 18K -2dB LD16-23dB LD2 2 V- 1 LM ADJ REF RHI R11 2K C6 47u RLO IC3 15 LD10 LD8 LD6 LD dB 16-10dB -8dB LD14 LD dB -4dB dB D7 1N4148 D8 1N4148 R18 2K2 16 JD1 SIG 3 5 V+ ADJ V- 8 2 R16 1K LD20 LD dB MODE 0dB LM3916 RLO RHI REF SIG IC6 5 MODE JB4 9 LD26 RED LD24 YELLOW LD22 YELLOW dB dB +3dB LD28 RED LD30 RED +5dB dB V+ LEFT RIGHT IC1 = A1,A2 7 4 R12 18K R6 47K LOW IN R8 470K HIGH IN modifications reserved 18. DIAGRAM
16 Modifications and typographical errors reserved Velleman nv. H4306IP ED1 VELLEMAN NV Legen Heirweg 33, 9890 Gavere Belgium - Europe
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