Hi John,
Thanks again for the info, and the new link. I'll have a good read through that later tonight. I'm still an absolute novice, so I don't really even know what I'd do with more current at the moment. I'm generally just doing "electronics-by-numbers", following guides exactly, without really understanding how it all works, but I hope to pick bits up as I go.
Can you recommend any good, simple projects for me that'd be a good thing to make next? No worries if not. Now that my oscillator's done, I'm not sure what to focus on. I'm most interested in sound-making devices, but I'd happily make anything. I suppose I'm limited by my components - I have bags of resistors, capacitors, diodes, potentiometers, switches, and plenty of 40106 chips - but I don't know what I can actually do with them. I may research trying to make some kind of very basic push button drum machine. Could be fun.
Cheers,
Jamie