Velleman K8042 Illustrated Assembly Manual Download Page 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. 

 

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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. 

 

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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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Summary of Contents for K8042

Page 1: ...SYMMETRIC 1A POWER SUPPLY K8042 ILLUSTRATED ASSEMBLY MANUAL H8042IP 1 Low cost universal symmetric power supply...

Page 2: ...ut voltage LED output indicators compact size Specifications positive and negative output adjustable between 1 2 and 24VDC output current up to 2 x 1A continuous with suitable heatsink max input volta...

Page 3: ...he 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 ha...

Page 4: ...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 CORRECT MOUNTING SEQ...

Page 5: ...1N4007 D10 1N4007 2 Diodes Watch the polarity D CATHODE J 1 Jump wire C3 100nF 104 C4 100nF 104 4 Capacitors C RV1 2K2 2K5 RV2 2K2 2K5 5 Trim potentiometers SK1 2p SK2 2p SK3 3p 6 Terminal blocks LD1...

Page 6: ...specialized dealer to one side of an insulation plate and press it with this side against the heatsink there were the component has to be fitted Then apply a little heat conducting paste to the compo...

Page 7: ...7 Fit the components and heatsink onto the PCB and fix it by means of two 5mm spacers and two screws Solder now the connections of the voltage regulators 2 Heatsink construction 3 Screw Spacer...

Page 8: ...Kit into a enclosure you have to drill two holes in the backside of the housing to pass the 15mm M3 bolts trough 11 Using a metal enclosure as a heatsink Heat conducting paste 15mm M3 bolt Insulation...

Page 9: ...12 Connection enclosure VA 0 Req output voltage Req AC input voltage transformer 1 2 5V 2 x 9VAC 5 9V 2 x 12 15VAC 9 12V 2 x 15VAC 12 15V 2 x 18VAC 15 18V 2 x 22VAC Absolute max AC input 2 x 24VAC 0 V...

Page 10: ...10 PCB 13 PCB layout...

Page 11: ...11 diagram 14 Diagram...

Page 12: ...5 4 1 0 3 2 9 3 2 7 1 3 2 Modifications and typographical errors reserved Velleman nv H8042IP 1 2014 rev 2 VELLEMAN NV Legen Heirweg 33 B 9890 GAVERE Belgium Europe...

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