I wanted a TV mount that I could attach to the upper portion of my entertainment center, but could not find one that would fit without modification, so I do what everyone here does - make my own. I'll show you how I made mine and hopefully give you some ideas on how to modify mine to fit your needs. I'll also try to point out things I would do differently and my learning opportunities (mistakes).
Step 1: Get your Stuff
Please review the entire instructable to see how things go together and see how you will need to modify my qty's and dimensions to match your needs. Now lets talk stuff you need.
+First you need to know the mounting hole pattern on the back of the TV you plan to hang. These should be in the instruction/owner manual (aka trash) or you might be able to look it up on line, or just measure it. They should be something like 75x75mm, 100x100mm, 100x200mm or 200x200mm. My TV is 200x200mm.
+Dimension from top hole, to top of TV, mine was about 8"
+Where you are going to mount it and hardware required
Pieces and parts :
+3/4" black pipe (mine is 12")
+3/4x1/2NPT street elbow (see recommendations at the end)
+1/2NPT T fitting
+1/2x1/4NPT black bushing
+1x1x1/8 angle iron (length as needed mine was 8')
+Qty 2 - 5/8" bolt
+3/4"NPT pipe floor mount
+cheap PFTE cutting board (get at the dollar store), these are the white plastic type boards, very slippery
+Qty 4 - screws for your TV - some sets come with them (my old Visio), some don't (my new LG)
+Qty 4 - lock washers for the diameter of the screws above
+Qty 4 - flat washers for the diameter of screws above
+Qty 10 - #10x1/2 flat head, metal screws with nuts
+Qty 4 - 1/4-20x3/4 pan head, metal screws with nuts
+Qty 10 - #10x3/4" flat head, wood screws