A speaker consists of a baffle connected to a coil of wire wrapped around a magnetic core. When electricity is passed through the coil it will move, pushing or pulling the baffle, which in turn moves air and produces an audible sound.
Speakers are very low resistance and so require capacitors to block the DC current. An alternative is the piezo which can be driven directly from a PICAXE output line.
Speaker
Schematic
PCB
Play sounds
This program will play an ascending sequence of tomes through a speaker connected to output pin B.1.
- Code Example:
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main: for b1 = 1 to 100 ; cycle through sounds sound B.1, (b1,25) ; play that sound next b1 pause 5000 ; wait five seconds goto main ; repeat
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Create Module
A speaker may be connected via the BCX38C darlington transistor create module (buzzer shown here). However the speaker must be a 32 or 40 ohm (not 8 ohm) type.
Bill of Materials
Description | Code | Qty | |
---|---|---|---|
64 ohm speaker | SPE010 | 1 | Buy Now |
22uF electrolytic capacitor | CAP005 | 2 | Buy Now |
Simulation
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