For the base material I used some MDF type board from an old picture frame. Since it was less than a 1/4in thick I had to use multiple layers of this, adding up to about 3 square feet (this area will depend on the footprint of your laptop). I used a small 3in x 8in steel plate (less than 1/8th in thick) for the mounting plate and 4 small wood screws to attach it. For the clamps, I used two small knobs, some 1/4-20 threaded rod, 2 1/4-20 nuts, and 4in of shower door framing (for the clamp frame). A thin piece of foam protects the computer from the clamp. The clamps are connected to the base of the stand with two 1/4-20 tee nuts. Finally, a short piece of 1/4-20 threaded rod and short piece of 3/8th in threaded rod are used to store the two mounting wing nuts, one 1/4-20 wing nut for the standard camera mount and a 3/8th in wing nut for tripod mounts. Just to avoid any confusion, let me clarify that most tripods use the 1/4-20 standard and connect directly into a camera. However, for some tripods that you can change the head on, a 3/8ths in thread is used to connect the head to the tripod base.
Heres the summary of items to get-
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Baseboard
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steel mounting plate
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4 small wood screws to attach steel plate
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2 knobs
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threaded 1/4-20 rod (or just hack a long bolt)- about 4in long
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2 1/4 20 nuts
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3/8ths in threaded rod (or just hack part of a bolt- about 1 in long
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Some U shaped extruded aluminium for the clamp frame ( size will depend on laptop thickness
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A little bit of thin foam to pad the clamp
The tools (and adhesives) that I used were
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Drill and a set of bits (up to 1/2in) for metal and wood
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1 1/2in and 1 1/4in hole saws
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Angle grinder (for metal)
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Clamps (the more the better)
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Wood glue
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Epoxy
If you have a tripod with a quick release mount then you could machine a replica mount to be permanently and securely fixed to the baseboard. That would make for easier assembly.
Another thought - if the laptop is going to be clamped to a foam mat it may be worth having some ventilation holes in the baseboard and mat that match up with those in the laptop.
Me too!