As most of you already know, some Canon DSLR have a dedicated plug for the remote. This is pretty annoying, especially when we want to make a special diy shot controller. The easy way is to buy a cheap remote and cut the plug from it, and there is also the chance to find a remote which has a socket to connect a common 3.5mm audio jack to shot and focus contacts.
I'm sure to have one of them, but I'm not sure where it is ;-) so I decided to DIM (do it myself!) an N3 plug.
Step 1: The reference
I'm lucky to already have a compatible shutter remote (which I use for timelapses), this is necessary because we need obviously a reference to model our plug, and we don't want to flow resin into the camera socket, do we?
Step 2: The pins guides
First we have to insert three short single core wires into the little holes. These wires would reveal the pins position in our mold, and would keep in place the cables meanwhile the resin hardens.
Bend the wires so that they will remain in the mould after the casting, I've also glued them together with some double component epoxy glue.
To avoid that the plug sticks to the cast you can cover it with some silicone grease.
Step 3: The silicone rubber
To make the cast you've various options, I opted for a double components molding silicone rubber, which is handy because you can keep it for years in your drawer and it will always work. Of course you can also use the Sugru, which maybe has a better colour, I don't like pink, I prefere purple ;-)
Step 4: The molding stamp
After some time (sugru is faster, my silicone rubber needs some hours), you can keep out the plug. If things go right, the single core wires should stay attached on the cast. Check that the wires are in the right place and straight vertical.