Lucky Wheel

A random number/choice generator

Schematic Diagram and Component List

Name
Quantity
Position

CR1220 Battery Holder

2

BT1, BT2

220uF Electrolytic Capacitor

1

C1

1uF Electrolytic Capacitor

1

C2

Red LED Light

10

0-9

DPDT Self-locking Switch

1

KG

S9014 NPN Transistor

1

Q1

10k Ohm Resistor

1

R2

470k Ohm Resistor

1

R3

1M Ohm Potentiometer

1

R13

Switch

1

S1

555 SO-08 IC

1

U1

4017 SO-16 IC

1

U2

Procedures

Place and solder the battery holders first.

Place and solder the IC connectors.

Place and solder the resistors at position R1 and R2.

Place and solder the switches.

Place and solder the NPN transistor and potentiometer.

Place and solder the capacitors, be aware of their polarity.

Place and solder the LED lights, be aware of their polarity.

Insert the ICs into the adaptors.

Check the components.

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