How To Make Optimal Container for Digital Wireless Transmitter To Protect it from Water and Dust Ingress
(...CONTINUED from Page 4) Since the transmitter must be electronically connected to a metal detector, one hole must be made in the transmitter's container to run a connecting cable through it.
To achieve full protection for the transmitter against water and dust ingress, I had to do the following: 1) make a sizable depression upward in a lower corner of the container (when it is set upright against the armrest) to prevent the water from reaching the hole, and 2) make a hole inside the dimple, which would be tight enough to prevent a 3.5mm plug of the connecting cable from moving back and forth inside the hole once the plug is implanted into it.
To make a sizable dimple in the container's corner, I filled a metal Saute pan half way with water and brought it to a boiling point on my cooking stove. I also prepared a second pan with ice cold water.
My idea was to press the container's corner against a hot bottom of the Saute pan being heated to soften the corner while the boiling water would prevent the plastic from melting.
As soon as the plastic was soft enough, I took the container out of boiling water and pressed a dull end of a wooden cooking spatula (be careful not to break it) against the container's corner.
As soon as a little depression was made, I immediately submerged the plastic container into the ice-cold water to harden the plastic so that it would not return into its initial shape.
Since my method was not highly efficient (but better than nothing), I had to repeat the above-described procedure a few times to get, little by little, desirable results - the depression was deep enough to conceal at least a half of the sticking-out connector.
Another good use of the corner depression was to protect the plug from accidental knocking off as, without a dimple, it would be sticking an inch out of the container and fully exposed to external damaging forces.
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