Atari Punk Console v2 I like the vintage crunchy 8 bit sounds these make, and I found a schematic for an upgraded version. I can't remember where I found it. I used Fritzing (free for Mac) and planned out the PCB layout. I printed it on PCB transfer paper, ironed onto copper board from Radio Shack, etched it, drilled the contact holes, soldered all hardware. I used an external HDD box as my enclosure because it was free. Bad choice as it seems the coating on all of the plastic carries a charge, so if it moves at all and anything touches the bottom or a wall, it shorts out. Other than that it works great. External headphone jack for a speaker and a power toggle.