Due to inside the moon got some metal pieces and wires. To protect the short circuit and to protect the weak point of soldering to crack. I need to cover circuit module by plastic resin, of course it needs 1 set of mold. Let's go...
making specimen by covering circuit module with plasticine ~ 1mm. thickness
is much enough (try not to make more than 1 mm. because our space is very limited.)
also cover edge profile.
to cover the weak points help more reliability.
Make PP board as box above size is 5 mm offset from sound module.
Making silicone base by poring silicone(hard type) 3 mm thickness.
Once silicone base is completely dry. Cut PP board as slot 2.5mm (size of group of wires) down till 3 mm above silicone base level.
cut another side (for next wires)
Place sound module specimen into center of box. Plug slot upper wires.
Top view
Now making the 2nd layer (sound module lower half)
to see the half level.
we're making the upper half. Coat the lower half by vaseline.
Pore the soft type of silicone (3 mm from top of specimen)
wait till silicone is dry (~ 2 hrs.)
Once silicone is completely dry, pore plaster thickness 10 mm.
This step needs 1 day to be dry.
finished the mold for sound module. Get ready to make resin of it.
Check the gap all around to see the side of wires and gap.
Pore resin into each side of mold.
place sound module, ensure the group of wires are sit on the right position.
wait till they turn to be jelly, then close the mold.
Ensure wires are still on the right position.
Now we already have sound module with the insulation
(to protect short circuit, soldering crack etc.)
This part seems waste time, but it's worth for me.
It's more reliability for limited of area (inside the moon)
Hope you learned some benefit of this part and enjoy it more or less.
Next part would be "how to fix switches into the moon" and more on soldering steps.
thanks for watching
Bye for now... ^_^
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