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3
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1answer
78 views

Wire Wrap Joint in High Humidity

How does a wire wrap joint compare to a soldered joint in high humidity conditions? Corrosion? Electrolysis? Joint resistance creeping up?
0
votes
1answer
89 views

Best Soil Moisture Circuit

There have been an number of circuits discussed here to detect soil moisture. Most use conductivity of the soil though there is one reference to using a galvanic cell to generate a voltage. What is ...
0
votes
0answers
79 views

DHT22 temperature & humidity sensor react slowly to the environment change

I am right now connecting the DHT22 temperature and humidity sensor to the Arduino. It works well to print the temperature and humidity value every three seconds. However, I made a experiment to put ...
0
votes
2answers
87 views

Humidity sensor with more probes

Could you advice how to amend such schema in order to measure humidity on more probes? The 555 is functioning as a resistance-to-frequency converter. A probe (on the left side of schema) is ...
6
votes
4answers
231 views

Is there a sensor that is equivalent to a dry toothpick?

For the non-cooks in the audience the dry toothpick test is used in baking (cakes, banana bread, etc.) to determine when the item is done baking. The procedure is to stick a toothpick into the food, ...
2
votes
1answer
147 views

1-wire humidity sensor with ID

I've created a temperature monitoring system using multiple DS18B20 temperature sensors and now I want to add some humidity sensors to it. The problem is that I cant find any 1-wire humidity or ...
0
votes
2answers
99 views

How does water damages the phone lines?

Today, we just replaced the phone line which was damaged due to moisture and were causing a great deal of disturbance and noise in the phone. What exactly causes this noise? Does the signals gets ...
0
votes
0answers
38 views

How to preserve MSL 3 devices

I have bunch of ICs that is rated MSL3 that came in a moisture barrier bag. For an urgent work, I needed to open the package to use one device. Could anyone tell me how I should preserve rest of the ...
5
votes
3answers
535 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 ...
2
votes
1answer
110 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
76 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
256 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
600 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
1k 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
939 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
102 views

Does humidity relate to static sensitive?

Are components more static-sensitive in drier places or vice versa?
2
votes
3answers
3k 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
229 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
444 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
190 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
366 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
4k 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
381 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
1k 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
4k 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
865 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
307 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%) ...
9
votes
7answers
3k 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
15k 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
198 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
570 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 ...