Velleman-projects K8025 Assembly instructions Manuel d'utilisateur télécharger pdf (Page 7)

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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uxorgrease.

• Adiagonalcuttertotrimexcesswires.Toavoidinjurywhencuttingexcessleads,holdtheleadsotheycannot

ytowardstheeyes.

• Needle nose pliers, for bending leads, or to hold components in place.

• SmallbladeandPhillipsscrewdrivers.Abasicrangeisne.

) 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, the 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leaet.

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

Construction

R...

 R1...R3 :68K (6-8-3-B)

 R4...R7 :680 (6-8-1-B)

 R8 :330 (3-3-1-B)

 R9,R10 :180 (1-8-1-B)

 R11 :560 (5-6-1-B)

 R12 :1K (1-0-2-B)

 R13 :120 (1-2-1-B)

Resistors

CeramicCapacitor

 C1,C2:27pF (27)

 C3 :1nF (102)

 C4,C5 :220nF(224)

Diode(Checkpolarity!)

CATHODE

D...

 D1:1N4007

IC-socket

 IC1:14p

Switch

 SW1:poweron/off

Batteryholder

Pushbutton

 SW2:Pattern

Electrolyticcapacitor

Quartzcrystal

C...

 X1:4MHz

Watchthe

polarity!

X...

 C6,C7:10µF

 E1:3V

(#part.CR2032)

Pushbutton

SW...

 SW3:int/prog

Mount &

solder on

solderside !

Watchtheposition

ofthenotch!

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Velleman-projects K8025 Assembly instructions Manuel d'utilisateur Page 7

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