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

good idea!

 

dougwithau
User Rank
Author
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


Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Martin Rowe

Leonard Nimoy, We'll Miss you
Martin Rowe
1 Comment
Like many of you, I was saddened to hear the news of Leonard Nimoy's death. His Star Trek character Mr. Spock was an inspiration to many of us who entered technical fields.

Max Maxfield

Awesome 3D Electronic Sculptures
Max Maxfield
10 comments
I recently received an email from someone we'll call Martin (because that's his name). Martin's message was short and sweet. In its entirety it read: "You need to see this!"

Rajaram Regupathy, Cypress Semiconductor

Add USB Battery Charging Protocols to an Android-Based Design
Rajaram Regupathy, Cypress Semiconductor
Post a comment
Editorial Note: Excerpted from Unboxing Android: A hands on approach with real world examples, by Rajaram Regupathy, the author takes you through the process incorporating effective power ...

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
16 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Special Video Section
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...
Avago’s ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...
Doug Bailey, VP of marketing at Power Integrations, gives a ...
See how to ease software bring-up with DesignWare IP ...
DesignWare IP Prototyping Kits enable fast software ...
This video explores the LT3086, a new member of our LDO+ ...
In today’s modern electronic systems, the need for power ...
Radio
LATEST ARCHIVED BROADCAST
EE Times Senior Technical Editor Martin Rowe will interview EMC engineer Kenneth Wyatt.
Flash Poll