Velleman EDU02 Manuel d'utilisateur télécharger pdf (Page 7)

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Piezo speaker

A piezo speaker converts an electric

signal into sound. Polarity is not

important

(Velleman part# TV1)

Microcontroller (µC)

A programmable device which can perform various tasks.

We have pre-programmed it so that it will play musical notes or it

will generate the sound of a cricket. This device is has a polarity.

Watch the position of the notch.

(Velleman part# VKEDU02)

Transistors

E B C

C B E

A transistor is an amplification device. By means of a small

current, a much larger current is controlled. Transistors come in

two flavours, NPN and PNP-types, depending on the polarity. With

this kit, you receive a BC557 (PNP) transistor. A transistor has 3

pins: Base, Emitter and Collector.

(Velleman part# BC557B)

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Velleman EDU02 Manuel d'utilisateur Page 7