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
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