Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [water]

Involving or pertaining to liquid water (flow, storage, measurement, conductivity of, etc.)

164 questions
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Using a bottle of water as a resistor

Today, while drinking some water from a \$500mL\$ bottle, I started reading the info about the water and found out that the conductivity (\$\sigma\$) at \$25°\$C is \$147.9\mu S/cm\$. So it came to my attention that maybe I could calculate the…
Thiago
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Why does water damage low-voltage microelectronics so easily?

Everybody has had the time where water gets all over their electronics, and the whole thing gets ruined, like cell phones. At that low of a voltage (3-5 volts), I don't understand why it is such a short-term harm (long term makes sense - corrosion,…
skyler
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Why does water short out PCBs? (i.e. Why doesn't electricity follow the path of least resistance?)

If copper is more conductive than water (at any reasonable PH), submerging copper electronic circuits in should have no effect, as the electricity should continue to follow the path of least resistance (the highly conductive copper PCB paths, for…
Asker
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What about water makes it destroy electronics?

From my understanding water shouldn't really damage electronics, but it does. what about water actually causes damage, and why is water with impurities such as salt make it so much worse?
Terry
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Prevent corrosion of circuit board fallen in water

I apologize in advance if this question is off the topics answered on this forum. Some hours back my drone fell into some dirty water. I was able to rescue the device, unplug its battery, open up its circuit board, dry it thoroughly using a…
TheLoneWolf91193
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Should I cool off in water the desoldered components?

I use a REGULAR (for home-use, not for electronics) hot air gun to desolder non-SMD components from PCBs. The components are really hot (naturally) after desoldering and it takes a while until they cool off. Is it better or worse if I cool then off…
Gabriel
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Are my soaked capacitors still okay?

When the delivery man dropped my capacitors off earlier yesterday he did not ring the doorbell and I had no idea they had arrived on my front step. Then an intense rainstorm showed up and soaked the whole lot of my eight 1500uF, 450V caps. They have…
Jeremy Adams
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Water and Electronics?

I've read a lot about people cleaning keyboards in the dishwasher. But how does the water damage electronics? Does it cause shorts on the ICs on the internal circuitry or physically get in the IC(which I can't see happening). So what actually…
Dean
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Why does my Vbe multiplier voltage oscillate when wet?

I've built a few Vbe multipliers as cheap temp sensors. I know there are better ways to sense temperature but I am not interested in accurate measurements, and my question is exclusively about a strange behavior (oscillating/irregular voltage…
Sredni Vashtar
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Sensing water level electronically

I am working on an electronic water sensing mechanism. I need to sense various levels of water as the water level is consumed and refilled in an underground water tank. Later, I want to control the sump motor with logic when various conditions are…
sunnyimran
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Is it possible for snow covering a car battery to drain the battery?

We had a snow/ice storm last night, and somehow the snow got into the engine area. Is it possible that the snow covering the battery was the case of draining the battery?
a coder
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How is saltwater able to conduct electric charge between two wires?

Say I put some wires in a container filled with saltwater, but the wires do not touch, and I connect these wires to a battery: simulate this circuit – Schematic created using CircuitLab I know that the saltwater will complete the circuit, and some…
Phil Frost
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Is USB-C unsafe in humid/water conditions?

We had a case in France of a teenager who died by electrocution while taking a bath when his phone that was being charged fell in the bathtub (as reported by the press). How is it possible taken into account the power provided by the usb-c…
WoJ
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Why is my multimeter not measuring current?

I'm doing a little bit of experimentation with a glass of water and a 9 V battery. I added a little bit of salt to the water, and I measure the resistance in the water from probe to probe to be ~60 kΩ. Ohm's law tells me the current (given…
Outis Nemo
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Use a 15µf capacitor instead of original 12.5 µf for a water pump?

I have a 0.5 HP water pump. It's having trouble in starting and I have noticed the capacitor is damaged. It had a 12.5 µF 450V capacitor. When i went to buy a new capacitor the seller gave me a 15 µf 450V condenser and he said we can fix a 15 µf in…
Rifky
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