I have 3 sound/light PC boards from Robbe. Only one of them has holes for mounting. How do you mount these things?

Maybe you can make a slide-in frame out of balsa or some other material like foam.

In the computer shops there is often a hardware bit n pieces department where you can get mounting pillars. If the holes in the boards line up, you can stack them.
Making a slide-in frame as already suggested works well.
Having been in electronic engineering most of my working life, I have a regretable tendency to put gear like that in a plastic bag to provide waterproofing and insulation, and fix it with double sided tape to a convenient place.

Correction. The one board with mouting holes is Robbe. The 2 boards without any way to mount them are RAM. I was thinking about simply using velcro right on the backs of the boards. Comments?

Velcro works, but it always ticks me off when the applied load of the wires twists it around, it hardly looks shipshape and Bristol fashion!
So I make a low-walled close-fitting box around the board, and Velcro the board into the bottom of the box. Works for ESCs and Rxs too.

Pat M

Hi,

What I do (assuming there are holes in the corners of the PC boards) is to cut 4 pieces of fuel tubing to an equal length and use them as spacers. I then screw it down using #2 x ? screws into your main floor or mounting board inside the boat. This allows for a simple CHEAP and flexible shock-proof type mount for them....works for me For the ones without holes, you can carefully drill small holes in them somewhere on the board (inspect carefully to figure out where) and drill holes accordingly.

Pete

I once tried using sticky tape on the solder side of the RAM boards and the sound wouldn't work right until I removed all the adhesive between all the metal contacts.
Since then I put the RAM board in large diameter heat shrink tubing and warm it enough to shrink wrap it.

I then put two sided stick tape on flat side of shrink wrap to mount it.

Jim Shander