Hi, I think I should point out that I know absolutely nothing about electronics, but I can solder. I am looking for an idiot's guide to build an inverter for 14V DC to work from my car cigarette lighter. I need an output of about 7 amps, but I could build multi units if this is impractical. I would use Maplins for parts unless anyone can point me at another parts stockist in NW London. Thanx.