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Questions tagged [potting]

The processes of completely containing a PCB or entire electronic device in a compound designed to protect it from vibration, moisture, etc.

24 votes
3 answers
719 views

How do you build a machine in a solid block?

I'm aware that a number of mass produced electronics are embedded in a solid thermal resin of some form. How reasonable is that for the home hacker? What materials are used? How do you do it? Are ...
Suni's user avatar
  • 241
20 votes
7 answers
54k views

What's the best way to protect a board from corrosion in a hot/moist environment?

Some of my projects need to live outside for long periods. Sometimes, moisture gets into the enclosures. That means that a circuit board might be sitting around in contact with water for hours on ...
edebill's user avatar
  • 2,519
15 votes
10 answers
2k views

Does this exist: Insulating material to cover circuit

For example when you build a circuit you have the board and the components between them is air. Is there a clay like material that will act like air does? Application: you could bundle simple ...
stuckie27's user avatar
  • 407
11 votes
5 answers
976 views

Pebbles in potted electronics

I was recently taking a look at a failed power supply for 12V halogen lighting and noticed an unusual texture in the potting compound. I tried chipping some of it away with a screwdriver and got a ...
user avatar
9 votes
2 answers
745 views

Pour-and-drain conformal coating as an alternative to potting

Is there a standard process to pour conformal coating, similar to potting, but then drain the excess? The benefit of draining the excess is to reduce weight and get better cooling. From my limited ...
JimFred's user avatar
  • 703
6 votes
1 answer
1k views

Can you tell me more about "re-enterable" potting compound?

I heard the term "re-enterable potting compound", which is a gel-like (possibly hard?) material that can be used to fill electronics enclosures for water intrusion protection and other things. What ...
Steve's user avatar
  • 258
5 votes
3 answers
291 views

Best-practices for potting a high-voltage circuit

Can someone recommend best-practices for potting a passive DC high voltage (<20 kV) circuit? I'd like to eliminate a micro-discharge problem we are seeing. Details of our use-case follow: I have a ...
Adam V. Steele's user avatar
5 votes
1 answer
434 views

Why are some relays not completely sealed?

Here are some of the pictures of PCB relays I found online. One may notice there are these opening/holes on the top or bottom of the package. What are the purposes of these 'air vents'?
FlakR's user avatar
  • 749
5 votes
2 answers
3k views

Potting Connectors

I work for a company manufacturing electronics. We have a few products where we pot boards into enclosures. Where it is done the incoming connections are always soldered for fear of condensation ...
Steinar's user avatar
  • 768
5 votes
2 answers
1k views

Waterproof enclosures

I have a simple farm gate monitor which I'd like to put in a rugged waterproof enclosure to keep it dry enough to operate outside for approximately ten years with no maintenance other than the ...
Richard's user avatar
  • 51
4 votes
5 answers
2k views

USB Circuit Failure After Potting

I'm experiencing a strange failure of electronics after potting which I'm hoping to get some more insight and explanation to. The device is a custom, rugged USB drive in an Aluminium/Titanium body (...
uesp's user avatar
  • 191
4 votes
3 answers
4k views

Removable/soluble potting compound?

Are there removable/soluble potting compounds that are moisture-proof yet removable without damaging electronic components? I've been able to plunge-mill potted devices to get near enough to ...
JimFred's user avatar
  • 703
4 votes
3 answers
5k views

Is hot melt glue suitable as potting compound?

I need some small/cheap waterproof junction boxes for some 12v garden lighting. I am considering using little (25mm x 25mm x 15mm) potting boxes and after soldering the wires, then filling the potting ...
njh's user avatar
  • 185
4 votes
3 answers
3k views

Is there a cheap thermally conductive, electrically insulating potting compound?

I've got some some ready-made 12v LED units. I wanted to pot each and put it in a metal container for robustness and to try and dissipate some heat. I'd like to pot the circuit but was hoping to ...
Joe's user avatar
  • 153
4 votes
0 answers
162 views

Potting a board with SMTs

I am trying to find the correct potting compound for a device that will sit on top of lead acid batteries. It will have SMTs, and we would like it to tolerate temperatures as low as -40. Because of ...
Danniard's user avatar

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