User Manual

7
Piezo speaker
A piezo speaker converts an electric
signal into sound. Polarity is not
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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