Author Topic: AVR Microcontroller Wet?  (Read 2406 times)

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Offline airman00Topic starter

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AVR Microcontroller Wet?
« on: March 07, 2009, 03:04:28 PM »
What happens if an AVR microcontroller gets dropped into water(without power)? Would it survive?
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Offline superchiku

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Re: AVR Microcontroller Wet?
« Reply #1 on: March 07, 2009, 03:27:48 PM »
see these are practical things...drop one o urs and then test it  ;D ....i guess they will work coz...the dip is quite solid bound and gud enough to hold the nternal circuits alive
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Offline airman00Topic starter

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Re: AVR Microcontroller Wet?
« Reply #2 on: March 07, 2009, 03:41:00 PM »
see these are practical things...drop one o urs and then test it  ;D ....i guess they will work coz...the dip is quite solid bound and gud enough to hold the nternal circuits alive
So I tested it now... Dropped in water , let it get wet for 5 minutes, then took it out and let it dry outside. 10 minutes later, it was still working.
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Offline superchiku

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Re: AVR Microcontroller Wet?
« Reply #3 on: March 07, 2009, 10:36:18 PM »
ya now lets experiment  and drop the chip with power given to it...
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Offline TrickyNekro

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Re: AVR Microcontroller Wet?
« Reply #4 on: March 08, 2009, 12:32:54 PM »
I recommend so alcohol at the chip so that there is no chance of having pins from oxidizing...
Generally, the only electronic things that may have problem with water is capacitor...
Any board being brushed well and dived to alcohol should work if dived at water before...
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Offline superchiku

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Re: AVR Microcontroller Wet?
« Reply #5 on: March 08, 2009, 01:17:14 PM »
a new idea why dont u drop the avr in hot oil....then we'll literally have FRIED CIRCUITS ;D
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Offline HDL_CinC_Dragon

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Re: AVR Microcontroller Wet?
« Reply #6 on: March 08, 2009, 01:57:52 PM »
most circuits will be fine if they get wet as long as theres no power to it when they do get wet. just let em dry out for a little while and theyll be good to go.
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Offline superchiku

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Re: AVR Microcontroller Wet?
« Reply #7 on: March 09, 2009, 12:06:34 PM »
hve u ever dropped ur lobile phone in water...ull see that if u let it dry for sometime, it works like normal but when it i wet either the lcd wont work or some circuits wont work...coz the water short everything by decreasing resistance...if the water is gone then ur circuits will work normally...
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Offline TrickyNekro

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Re: AVR Microcontroller Wet?
« Reply #8 on: March 09, 2009, 01:41:06 PM »
and if your lipo isn't water proof.... it's just gonna blow!!!!
Hehehe.....
But usually they work....
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Offline HDL_CinC_Dragon

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Re: AVR Microcontroller Wet?
« Reply #9 on: March 09, 2009, 01:44:24 PM »
Ive dropped my cell phone into a 4" puddle and didnt notice it wasnt in my pocket anymore until about 2 minutes later. Had to back track to find it. When I found it the LCD was cracked but the phone was operational... its was an old Nokia I think lol
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Offline SmAsH

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Re: AVR Microcontroller Wet?
« Reply #10 on: March 09, 2009, 01:47:55 PM »
and if your lipo isn't water proof.... it's just gonna blow!!!!
Hehehe.....
But usually they work....
lol, at cadets last weekend we learnt why not to get the radio wet for that exact reason... wouldnt want that to happen now would we... ::)
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Offline superchiku

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Re: AVR Microcontroller Wet?
« Reply #11 on: March 09, 2009, 01:48:24 PM »
ya i knw nokia rocks once my friends dad threw a 3110 nokia phone out of the house ...with full force but it kept on rrunning
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Offline Soeren

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Re: AVR Microcontroller Wet?
« Reply #12 on: March 09, 2009, 04:07:17 PM »
Hi,

Yes, (some) Nokias rules, I still keep my 3310 as my secondary phone - can't kill it, although repeated dropping and the like will, little by little, destroy the speaker so that it gets weaker over time - I have repaired lots of 3310 with that exact problem for family, friends and coworkers.

Electronics isn't harmed by water if they're not powered - I usually drop my keyboards in hot soapy water for a day or two, when they need a bit of cleaning. a thorough rinse with water and a week (or less) in a warm spot and they're good to go (after reassembly).

If powered, it will depend a lot on the circuitry - I've seen tonnes of circuits go poof when getting wet, so when (not if) you get something wet, remove the power source immediately and completely (not just hitting the off button).
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Offline pomprocker

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Re: AVR Microcontroller Wet?
« Reply #13 on: March 09, 2009, 04:13:45 PM »
I dropped my entire roboduino into a bowl of distilled water :P

Offline airman00Topic starter

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Re: AVR Microcontroller Wet?
« Reply #14 on: March 09, 2009, 04:37:02 PM »
I dropped my entire roboduino into a bowl of distilled water :P
on purpose or not? :P
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Offline pomprocker

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Re: AVR Microcontroller Wet?
« Reply #15 on: March 09, 2009, 04:38:45 PM »
On purpose!!

Offline airman00Topic starter

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Re: AVR Microcontroller Wet?
« Reply #16 on: March 09, 2009, 04:54:20 PM »
On purpose!!
Score
Roboduino : 1      Water : 0
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Offline superchiku

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Re: AVR Microcontroller Wet?
« Reply #17 on: March 10, 2009, 01:17:48 AM »
nothing will happen if it has got no power
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Offline TrickyNekro

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Re: AVR Microcontroller Wet?
« Reply #18 on: March 11, 2009, 08:11:17 AM »
but nothing will happen if open too!!!
Distilled water is not conductive...
what is conductive in drinkable water is the ions in it that
act as electrons...

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Offline Ro-Bot-X

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Re: AVR Microcontroller Wet?
« Reply #19 on: March 11, 2009, 10:56:59 AM »
I dropped my entire roboduino into a bowl of distilled water :P

You wanna try that with acid?  ::) Or better with beer, you might say it got drunk!
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Offline HDL_CinC_Dragon

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Re: AVR Microcontroller Wet?
« Reply #20 on: March 11, 2009, 01:38:08 PM »
Try dropping it into a large vat of nitroglycerin
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Offline Admin

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Re: AVR Microcontroller Wet?
« Reply #21 on: March 25, 2009, 12:44:33 AM »
Distilled water is not conductive...
what is conductive in drinkable water is the ions in it that
act as electrons...
I believe you are confusing distilled water with de-ionized water :P

Offline pomprocker

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Re: AVR Microcontroller Wet?
« Reply #22 on: March 25, 2009, 03:31:41 PM »
Distilled water is not conductive...
what is conductive in drinkable water is the ions in it that
act as electrons...
I believe you are confusing distilled water with de-ionized water :P


They are both purified, just different methods of doing it.


Distillation

Distilled water is often defined as bottled water that has been produced by a process of distillation and has an electrical conductivity of not more than 10 ÁS/cm and total dissolved solids of less that 10 mg/L[1]. Distillation involves boiling the water and then condensing the steam into a clean container, leaving most solid contaminants behind. Distillation produces very pure water but also leaves behind a leftover white or yellowish mineral scale on the distillation apparatus, which requires that the apparatus be frequently cleaned. Distillation does not guarantee the absence of bacteria in drinking water; unless the reservoir and/or bottle are sterilized before being filled, and once the bottle has been opened, there is a risk of presence of bacteria.

For many applications, cheaper alternatives such as deionized water are used in place of distilled water.

Double-distillation

Double-distilled water (abbreviated "ddH2O", "Bidest. water" or "DDW") is prepared by double distillation of water. Historically, it was the de facto standard for highly purified laboratory water for biochemistry and trace analysis until combination methods of purification became widespread.

Deionization

Deionized water which is also known as demineralized water (DI water or de-ionized water; can also be spelled deionised water, see spelling differences) is water that has had its mineral ions removed, such as cations from sodium, calcium, iron, copper and anions such as chloride and bromide. Deionization is a physical process which uses specially-manufactured ion exchange resins which bind to and filter out the mineral salts from water. Because the majority of water impurities are dissolved salts, deionization produces a high purity water that is generally similar to distilled water, and this process is quick and without scale buildup. However, deionization does not significantly remove uncharged organic molecules, viruses or bacteria, except by incidental trapping in the resin. Specially made strong base anion resins can remove Gram-negative bacteria. Deionization can be done continuously and inexpensively using electrodeionization.

It should be noted that deionization does not remove the hydroxide or hydronium ions from water; as water self-ionizes to equilibrium, this would lead to the removal of the water itself.

 


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