The MFOS Alien Screamer Noise Box is a great introduction to synth-diy electronics. This simple circuit can really make a lot of cool sounds and it has a speaker and amp built in. It runs off of one nine volt battery and draws very little current. PC boards are available and kits will be soon also. You can find the entire project here: http://www.musicfromouterspace.com/index.php?MAINTAB=SYNTHDIY&PROJARG=ALIENSCREAMER/ALIENSCREAMER.php&CATPARTNO=ALIENSCREAMERPCB
