Sorry Gary, It seems you highjacked this thread.
The link I posted last does have values, it is a open source project.
If you do some of your own research you will find many more.
if this is for your shop than why do you need it to run off 12 volts DC?
You would be better off runing off 110VAC.
I have never made one and cannot help any further.
I suggest you start your own thread with your spesificashoins after you spend some time seeing whats already out there.
I will not do your research for you.
Happy New Year, Andy