Electronics > Projects, Designs, and Technical Stuff
Attaching PCB to wood
lutkeveld:
I have a capacitive touch board that I need to attach to wood.
Screws are not an option.
Hot glue does not seem like the most reliable option.
What would be a good option? Silicone, epoxy, double sided tape?
Thickness must be <1mm, otherwise the capacitive touch wont register anymore.
Does anybody have experience with this?
Conrad Hoffman:
I think the question boils down to what sticks to wood. The board is no problem. I've built various things with hot glue and it works well. There are various types of hot glue, some of which need more hot than others. IMO, the hotter pro versions are better. Another great thing is 3M VHB tape. Usually very reliable.
coromonadalix:
silicon caulk ?
Benta:
24h Epoxy is the thing (you know, the type with two equally sized tubes).
You'll need to fix the two pieces together mechanically and put the joint under pressure during curing. It's a good idea to add food-wrap foil between fixture and assembly, otherwise you may end up with a larger assembly than you planned for.
Preheat your oven to 100 C, chuck the assembly in and wait 30 min.
Done.
(Don't tell your wife about the oven part).
ejeffrey:
--- Quote ---Thickness must be <1mm, otherwise the capacitive touch wont register anymore.
--- End quote ---
I don't understand. Presumably you are gluing the non-touch sensor side to the wood?
It would also be good to understand why screws aren't an option and what kind of wood. Are you gluing to a thin piece of plywood with a cutout for a down-facing sensor?
Anyway, my first choice would also be standard long-set epoxy. Hot glue is tricky because it doesn't stay liquid very long so it is hard to get a thin and uniform layer inside the bond. You would probably have to make do with a few spots around the edge. Epoxy on the other hand gives you ample time to position the work pieces, secure them, clean up squeeze out and so on. Watch out for flow. Epoxy has a gotcha that if you use heat to cure it gets substantially less viscous when first heated. This helps it form a good bond as it flows into narrower areas and can permeate the wood fibers a bit more, but it can also flow where you don't want it.
Hot glue is a quick and dirty option, and it might work OK. It has the advantage that you can hold it in place while it sets, and it doesn't become less viscous at any point.
Navigation
[0] Message Index
[#] Next page
Go to full version