Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 2 / 2
antedeluvian
User Rank
Blogger
Re: FR4 PCB is water proof
antedeluvian   11/19/2013 4:14:35 PM
NO RATINGS
@dougwithau

good idea!

 

dougwithau
User Rank
Manager
FR4 PCB is water proof
dougwithau   11/19/2013 3:55:57 PM
NO RATINGS
We used a PCB in an explosion proof enclosure. The side you connect to power and signal has to be physically isolated from the electronics and sensor. An FR4 board with solder mask is very waterproof. We put in a rubber gasket, made the board double thickness, and screwed it into the enclosure. It was a connector on each side, and ground plain to the screws. 

Usually this was done by tapping holes in the aluminum enclosure, then screwing in sealed ferite beads and soldering them to a connector or a wire. Cost was huge, plus over tightening the bead would strip the threads out of the hole way to often.

One round board, and a soldered on connector had no leaks. I left the enclosure full of water for weeks, til it got stinky and I had to throw it out. Saved about $60+ per unit.

<<   <   Page 2 / 2


EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Dr. Duino Diagnostic Shield Deduces Dilemmas in Arduino Shield Stacks
Max Maxfield
10 comments
As you are probably aware, I'm spending a lot of my free time creating Arduino-based projects, such as my Inamorata Prognostication Engine, my BADASS Display, and my Vetinari Clock.

EDN Staff

11 Summer Vacation Spots for Engineers
EDN Staff
20 comments
This collection of places from technology history, museums, and modern marvels is a roadmap for an engineering adventure that will take you around the world. Here are just a few spots ...

Glen Chenier

Engineers Solve Analog/Digital Problem, Invent Creative Expletives
Glen Chenier
15 comments
- An analog engineer and a digital engineer join forces, use their respective skills, and pull a few bunnies out of a hat to troubleshoot a system with which they are completely ...

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
46 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)