SailNet Community - View Single Post - Custom Electronic Design
View Single Post
  #1  
Old 11-25-2010
asdf38's Avatar
asdf38 asdf38 is online now
Senior Member
 
Join Date: Jul 2010
Posts: 676
Thanks: 1
Thanked 4 Times in 4 Posts
Rep Power: 5
asdf38 is on a distinguished road
Custom Electronic Design

I know there are some other engineers out there so I'm wondering if anyone has tried any custom electronic design for their boats. I'm a hardware engineer with plenty of experience designing 12V systems, but no experience designing for harsh environments.

I've got a few ideas that would be fun to design and cheap to implement - until you consider the environment anyways:

-Design a small board for the electrical panel with a display for voltage and current draw. It would have a micro-controller so I imagine I could think of a couple other things for it to do (current/voltage history, averages, etc.)
Microcontroller with analog input and flash memory $3
Two character display $4

-Design a battery distribution board for the house/starter banks that could monitor battery current/voltage, implement a battery sensing relay and provide short circuit protection in addition to a regular fuse.
Current sensing (would need bi-directional) $1
High power mosfet, good for ~20A, several could be put in paralel $2
Mosfet driver $6

So, on paper its all real cheap (Fab the PCB at expresspcb.com) But how can it be designed to hold up? Waterproof enclosures I suppose. Protective coatings or epoxies? Any other thoughts? Anyone tried anything like this?

Chris
__________________
1979 Contessa 26
Boston, Ma
Reply With Quote Share with Facebook