Resistors ceramic capacitor, Diode, Ic-socket – Velleman projects K8025 Assembly instructions User Manual

Page 7: Switch, Battery holder, Push button, Electrolytic capacitor, Quartz crystal

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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 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

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 leaflet.

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)

: 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)

: 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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