[PSUBS-MAILIST] Fw: Amazon.com: Ebotrade-tech 42" 240w LED Off Road Light Bar Spot Flood Beam Work Light 4wd Boat Pickup Truck: Automotive

[Alan James via Personal_Submersibles]

I'd give it  a go too Hank.I've been doing a bit more Googling & can't find any specifics on capacitorpressure limits. Found this on an electronics forum. It may be of interestto Ken in his led light driver design.AlanIt's kind of funny reading these posts looking for advice for pressure tolerant electronics.. It seemed like such an esoteric concern when I started designing electronics for ROVs. I didn't think that there would be many other people out there looking for this information.Our electrical systems are routinely tested to 10.5kPSI (5000m+ some safety factor), and we really don't have too many issues with component failures (due to pressure). That being said, we do not use a handful of different types of components:   
   - Electrolytic capacitors
   - Tantalum capacitors
   - Hermetically sealed components.
   - Most metal can oscillators/crystals.
   - PVC insulated wire if in an oil compensated housing.
   - If critical, ferrite materials seem to exhibit fairly large changes with respect to pressure.
Other than that, most components work just fine. There are a few special cases where we cannot design out large bulk capacitance, specifically for motor control, where our electronic housings require special 1 ATM pockets where we seal special components.I have also had luck using MEMS oscillators in pressures below 5kPSI. Above that, we have had some failures. It's usually worth taking your final product to a pressure chamber and electronically monitoring it while it is operating at pressure, just to look for any sneaky issues.Let me know if you have any more specific questions too. I'll see if I can answer them for you.
      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Tuesday, June 23, 2015 3:08 PM
 Subject: Re: [PSUBS-MAILIST] Fw: Amazon.com: Ebotrade-tech 42" 240w LED Off Road Light Bar Spot Flood Beam Work Light 4wd Boat Pickup Truck: Automotive
   

Alan,
I think for the cost it is a worth while experiment.
Hank--------------------------------------------
On Mon, 6/22/15, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] Fw: Amazon.com: Ebotrade-tech 42" 240w LED Off Road    Light Bar Spot Flood Beam Work Light 4wd Boat Pickup Truck:    Automotive
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Monday, June 22, 2015, 9:24 PM
 
 Hank, I
 found this pic of a light bar being pulled
 apart.Looks like
 an impossible task potting the capacitors in this
 case.Who knows
 what pressure they will take.On the
 positve side, from the link  it looks like you have a 2
 year Warantee :)Alan 
  
    From: hank pronk via
 Personal_Submersibles
 <personal_submersibles at psubs.org>
 
 To:
 personal_submersibles at psubs.org 
  Sent: Tuesday, June 23,
 2015 11:43 AM
  Subject:
 [PSUBS-MAILIST] Fw: Amazon.com: Ebotrade-tech 42" 240w
 LED Off Road    Light Bar Spot Flood Beam Work Light 4wd Boat
 Pickup Truck:    Automotive
  
 
 
 Jon,
 This is
 the light bar on Amazon
 Hank
 --- On Mon, 6/22/15, hank pronk <hankpronk at live.ca>
 wrote:
 
 > From: hank
 pronk <hankpronk at live.ca>
 > Subject: Amazon.com: Ebotrade-tech
 42" 240w LED Off Road Light Bar Spot Flood Beam Work
 Light 4wd Boat Pickup Truck: Automotive
 >
 To: "hanker_20032000 at yahoo.ca"
 <hanker_20032000 at yahoo.ca>
 > Received: Monday, June 22, 2015, 7:42
 PM
 > 
 > 
 > 
 > http://www.amazon.com/Ebotrade-tech-Light-Flood-Pickup-Truck/dp/B00FWOKMI4/ref=sr_1_49?s=automotive
 >                          
 
 > 
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