Hero999
Banned
Don't be put off, it's really easy with an IC like the LM386 or TDA7052 (if you want it louder).Brian Hoskins said:Well analogue Electronics is not my forte, and whilst I'm quite capable of designing an audio amplifier (a crude one at least) I decided that I didn't have time so I bought a cheap amplifier module with an 8R output from Maplin. It's not very powerful, but it fits the bill quite nicely!
You probably only need a gain of 20 for an 8 ohm speaker so this minimal circuit will probably do:
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LM386 Schematic diagrams
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The Craplin amplifier module is probably just a simple audio amplifier IC with a couple of capacitors and resistors. These sorts of things tend to be really overpriced. It probably would have been economical to make your own.
What are you going to use for a speaker?
Although I didn't bother buying them (I've already got plenty of cheap speakers at home) I saw some small speakers in Pound Land a couple of weeks ago. Some were embedded in cardboard and folded up, others were attached to the end of an earphone jack. They would probably be ideal for this kind of thing, form memory (I'm purely talking about the drivers here) the cardboard ones were about 5mm thick and 45mm wide and the earphone jack ones were 25mm wide and 10mm thick. If there's a Pound Land you, I recommend taking a look.
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