4.5 to 25volt 15Amp power supply circuit

[ecat]

£21.50! The ones I found in a quick search were £110 each. lol. Of course you could DIY... http://sound.westhost.com/articles/diy-heatsink.htm . Beauty isn't it?

The lm338 is quite a bullet proof design, at Vin - Vout = 20v for example, the internal current limit will kick in at around 2.5A. This protects the chip but makes a nonsense of this designs claims. As always on the internet, if something takes your fancy do your best to verify everything about it, including the credibility of the author. When it comes to electronics, the link at the top of this post is good place to start.