Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [environmental-sealing]

For questions relating to the protection of electrical devices from hazards in their environment such as water, dust, vibration and mechanical impact.

37 questions
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I'm TV technician, but I don’t know how to save or protect the boards in my workshop

I have main boards, power supplies, and so on as spare parts. But sometimes they spend several years in my workshop waiting for a customer. When I find the right customer, several times the boards were damaged, mostly because of corrosion. How could…
NIN
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What keeps frying my RF switches?

Short version: What might be breaking the first sensitive component connected to an ungrounded 14cm UHF dipole antenna mounted 30' above the ground? Could it be related to static electricity? I have designed a built a few simple weather stations…
Barry Smith
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1 answer

What sealing type for cable/tube enter casing for outdoor use?

I build an electronic device which is used outdoors. A bundle of cables enter the device in a small 30mm diameter tube. This tube should be sealed so no dust/water/moisture enters the casing. It should be possible to remove tube easily for…
Flovdis
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1 answer

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'?
HYQ
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How can I seal a temperature sensor against water?

I have some DS18B20temperature sensors around and was wondering how can I seal them and use them in a water tank. The sensor must include a small resistance (140 k or so). Is there a simple DIY way to do it? it need to be something with a small…
otmezger
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2 answers

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 occasional change of battery. Electronically, it's a…
Richard
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5
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2 answers

IC's in high altitude and low temperatures

What happens to IC's when trying to operate them in extremely harsh cold and high altitude environments like Mt Everest? Could you take any ordinary phone or computer up there an expect it to work? I believe the altitude at base-camp is aprox 18,000…
knotseh
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4
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Bury LED in concrete outside, how to protect

I am wanting to place a 3mm LED and carbon resistor, outside between two paving stones. There is about a 4mm gap between pavers where the parts will be. The top of the Led will be flush with the top of the pavers and there will be wires running…
rlb
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4
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Effects of encasing bluetooth chip and rechargeable battery in an adhesive encapsulate?

I am thinking to encase my entire bluetooth PCB along and connected battery in an adhesive such as a soft urethane or silicone encapsulate. My board and battery are each about the size of two stacked quarters. Of course I will be avoiding getting…
Jet59black
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Using an arduino in below-freezing temperatures

I intend to use an Arduino in an environment with highly variable weather. It will be an outdoor project staying outside during the entire year with temperatures ranging from a maximum high of approximately 37C (~100F) to a maximum low of…
raphaeltm
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Possible to reliably run USB over a non-standard USB cable?

I'm planning on building a device for my car that sits somewhere in the rain tray or behind the dashboard. It will use automotive connectors so that things are sealed, easily connected and disconnected, etc. I plan on having it be…
Toby Lawrence
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Ozone and electronic equipment

Hopefully this is the right community to ask this question. Does anyone know whether there is a significant chance that ozone at approximately 15 ppm will damage consumer electronics, speakers, keyboards, and lab equipment, such as a Tektronix…
biggvsdiccvs
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Going from PD3 (pollution degree 3) to PD2 using IP54 (ingress protection 54)?

I wonder what is needed to reduce a PD3 (pollution degree 3) environment to PD2? It seems that IP54 housing could do it, but I have not found this clearly written in text (there is some vague mentioning of it in IEC 60664-1 Annex B, attached).…
warpi
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Can you identify this substance on PCB pads?

Can anyone identify what's going on on the PCB pads in the following photo? This is from an automobile ECU that had to be reprogrammed and so was opened and resealed a few days ago. Thermal (silver) paste was applied on the other edge of the PCB…
A2max
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Weatherproofing coax connections

I have coax-connectors connecting two cable runs that are subject to weather. Typically weatherproofing is done by wrapping the connection in suitable tape. This is a fairly messy solution if the connector needs to be opened. I am wondering if…
ARF
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