But don't waste time reinventing the wheel. I needed a small audio amplifier the other day and looked for an IC to build it. My junk box was empty of audio amplifiers so I went to a distributor and found a nice IC for 65p but minimum order 10 off. With postage the price was about £10, and I still had to find the other components and build it.
I was just about to order it when I realised it might be cheaper on eBay. There a found an assembled board with the same amplifier for 56p with a minimum order of 5 pieces:- £2.80 post paid and ready to use - and four spare ready-made amps for future projects.
I was just about to order it when I realised it might be cheaper on eBay. There a found an assembled board with the same amplifier for 56p with a minimum order of 5 pieces:- £2.80 post paid and ready to use - and four spare ready-made amps for future projects.
Beating the system is fun, too.