Looks doable, there's a Maplin shop not too far away so I'll take a look next time I'm over that way. If I get the parts and feel brave enough to fiddle I'll be sure to let you know how it goes

Thanks Hove, I'd love to try it but knowing what resistor and transistor to use is beyond me, I can solder but need parts lists for such things

Ahh, sounds like it may not be a good idea to try to run a cooling fan off of it then, thanks

Thanks for the reply, my understanding from the parts description is that the buzzer is 5v, the fan is a 20mm 5v fan which draws ~0.06Amps.

Just wondering whether replacing the buzzer with a 5v fan would cause and damage to anything (I'm working on the presumption that the supply to the buzzer would be good to drive a 5v fan of course )?