Speaker

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.

Related Commands:

Schematic

PCB

Play sounds

This program will play an ascending sequence of tomes through a speaker connected to output pin B.1.

Code Example:

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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