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Piezo speaker, Microcontroller (µc), Transistors – Velleman EDU02 User Manual

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)

Rouge

Noir