You can find all the info you need at the link above or with a simple Google search .
I love doing this DIY stuff, especially the more mechanical type projects. I can do basic things with electronics unless it requires curcuit calculations or testing equipment more advanced than a multimeter. I've designed a few circuit boards for motor relays at work, but if it has opamps in it then it's beyond me for now. I've got a few projects in the back of my head that may urge me past that ignorance someday, but I've got a lot of respect for the guys who really understand and can mod that stuff, such as you Richard. +T