[agrumpycow]

Originally Posted by Gaina

I saw a 'Thunder Bell' on TV a while back and I can't remember how he made it. If anyone has made one or has the instructions, I'd be really grateful if you could tell me. I know that some thin copper was involved as it was the change in air pressure that made the bell go off.

Thanks

I think I've heard of something like that but I can't find it now.....always the way ain't it
Does is work in the same way as this, this is a bit too blue peter-ish but the principle will be the same: BBC - Wear Weather - Build your own weather station - Barometer