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5
votes
3answers
478 views

Moisture Sensitivity Level - More than one chip in sealed bag

I've purchased three WM8804 MSL 3 chips, which came in a sealed moisture-sensitive package with instructions to mount the chips on the board within 168 hours of the bag being opened. However, it is ...
1
vote
1answer
72 views

How much humidity can a microcontroller/embedded device withstand?

I'm working on a project that employs a microcontroller in an 80-85°F environment with quite a bit of humidity. It's going to be placed directly next to an array of fish tanks. Obviously, the water ...
0
votes
1answer
44 views

Will Renesas V850ES/Jx3-E support 1 wire protocol (max detect temp/humid sensor)?

I would like to connect the DATA pin of sensor to Digital I/O pin of a microcontroller. I am confused that in the data sheet of the sensor they have mentioned this: MaxDetect 1-wire bus is used ...
1
vote
2answers
129 views

Does moisture affect electronics?

So the situation is the following: I'm making half a dozen of my own electrical circuits which I would store in a long wooden box along with my micro ATX motherboard and the rest of my pc. The big ...
3
votes
1answer
368 views

PID implementation for a Humidity controller

I'm working on a humidity controller which uses PID algorithm to control the process values. I have to implement 2 PID routines as there are 2 process values ( Humidity and Temperature) to be ...
2
votes
1answer
766 views

Converting an ADC value to equivalent Temperature?

I'm working on a humidity controller which also controls the temperature inside a chamber.I'm done with the hardware (though i'm not the one behind the design)and which was originally designed with ...
1
vote
2answers
300 views

How does this soil moisture sensor work?

I found information on how a capacitance moisture sensor works, but I couldn't find any information on how the following sensor works. What is the theory behind this sensor?
4
votes
2answers
88 views

Does humidity relate to static sensitive?

Are components more static-sensitive in drier places or vice versa?
2
votes
3answers
2k views

Ideal temperature and humidity for preventing problematic ESD conditions?

I know manufacturers often keep components sensitive to ESD problems in climate controlled rooms and I'm just wondering what the ideal temperature and relative humidity is to prevent ESD problems?
2
votes
1answer
191 views

Will an oscillator be able to drive a transmission line

I want to build a soil moisture measurement probe based on this idea: An oscillator feeds a transmission line burried in a soil via a termination resistor R1, XOR gate acts as a phase shift ...
0
votes
1answer
293 views

Experience with gel-filled junction boxes

A lost answer to one of my questions mentioned gel-filling junction boxes for moisture protection. Has anybody worked with this technique before? I am particularly interested in how difficult it is ...
2
votes
1answer
176 views

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 ...
3
votes
2answers
339 views

Is there any accurate Temperature, Moisture or pressure reading strip?

I was wandering if there is any such sensor, that would read pressure, temperature or moisture ( approximately 12 inch long strip)? I want to be able to dip this sensor into water and have it be able ...
2
votes
3answers
2k views

Can a device be damaged by water even if there is no power supplied?

For example, say I submerged a computer mouse entirely. Assuming that I ensured that all traces of the water were gone, would the device suffer any issues? It is my understanding currently that ...
2
votes
1answer
315 views

Determine humidity level of PCB circuit

How do I determine the minimum and maximum humidity allowed for a PCB mounted with IC's? (Without having to use some sort of humidity chamber) EDIT: During operation.
6
votes
5answers
997 views

What are viable approaches to a circuit to detect wet/moist cloth (bed-wetting)?

Trying to design a circuit that can reliably detect a situation where a child wets their bed. The 3 key requirements are -- Reliability of the approach Ease of use, i.e. a no-fuss approach Child's ...
4
votes
3answers
3k views

ICs with humidity or moisture sensitivity - bake recommendations

I purchased some ICs recently that included something I'd not seen before - a moisture 'sensor' on a paper strip with color indicators for a few specific levels of humidity. Once the paper reaches a ...
2
votes
1answer
772 views

Advice a humidity sensor with I²C interface

I like to interface a humidity sensor over the I²C bus. It should come in a small package, and consume little power. Accuracy isn't that important. I'm using the DS1621 as temperature sensor, I'd ...
3
votes
2answers
271 views

Are PTC/resettable fuses really moisture senstive?

I recently bought some 0805 Multicomp PTC/resettable fuses from Farnell. They were MC36213 (500mA) and MC36206 (200mA). I plan to use these in product which may exist in a high humidity (~80-90%) ...
8
votes
6answers
2k views

Soil moisture measurement

Background To kick-start my longstanding ambition of getting back into electronics, I decided to try and make a device that measures the soil moisture of potted plants to determine whether they need ...
14
votes
6answers
11k views

What's the best way to protect a board from corrosion in a hot/moist environment?

Some of my projects need to live outside for long periods. Sometimes, moisture gets into the enclosures. That means that a circuit board might be sitting around in contact with water for hours on ...
5
votes
1answer
189 views

High Temperature Humidity Sensor

Where can i get a high temperature humidity sensor for temperatures up to 700 or 800 degree Fahrenheit?
10
votes
3answers
545 views

Best humidity/temperature sensor for a nappy?

Special needs kids have big troubles with potty training. A 'wee-wee' alarm would be of a lot of help. What would be a good way of detecting 'it' without electrocuting anybody? A possibility would be ...