I bought a brainwave monitor on Ebay a few months ago for way too much money and, unlike the one that was my inspiration, the only way to get the thing humming was through electrode inputs, which I didn't have, nor could I seem to want to find. So yesterday I bought a soldering iron and installed a 1/4 inch jack so I could use a microphone and/or a guitar to get this old thing to squeal and hiss. The whole process was a blur and I can't believe I actually did it, but yeah, she's now a working, beautiful, boring machine. MP3s to come. Click the photo for a better view.Pre 1/4 Inch JackAnother Sunday Project