Questions tagged [water]

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

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1answer
50 views

Can I use medical injection water to fill lead acid battery?

Can I use sodium chloride injection ip (0.9% W/V) instead of distilled water to fill a lead acid battery?
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1answer
118 views

Water flow sensor still active after water stops

I have a water flow sensor that uses a rotor with a Hall sensor (ATS177 SIP-3 Hall effect sensor latch). The problem is that the rotor keeps spinning for some time after the water flow stops. Video on ...
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2answers
86 views

Is there a way to measure ripples in water with some kind of sensor?

Imagine you have a water tank on the top of a truck (like firefighters have.)Is there a way to measure how much the water ripples with some sensor? I know sensors that just tell you if there is water ...
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1answer
74 views

Circuit is not getting completed by bucket water

I have a battery and a 5V active buzzer. Putting the end of circuits (just raw wire) in the bucket full of the tap water is not completing the circuit. The buzzer, battery, and circuit are fine since ...
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0answers
84 views

More than sqrt(2)*AC after the rectifier. Why?

I encountered the following issue: supplying one working PCB with two different transformers (same model), the voltages on the PCB are different (higher!), even though the output voltages of the ...
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0answers
49 views

Calibration of capacitive sensor using AD7746

I bought an Analog Device EVAL-AD7746LDZ water level sensor demo board. I don't have the complete EB board, so I cannot use their LabView software directly. Anyway, I downloaded it and I'm studying ...
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2answers
60 views

Are electrode based, water level monitoring systems safe?

I want to install a pump control with water level monitoring system. I've seen all kind of sensors, ultrasonic, infrared, mechanical (Based in pressure switch's / float valves), etc. One of the most ...
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1answer
72 views

Can I clean/Salvage this board?

wondering if anyone could help me out here. I don't work with PCBs, but troubleshooting a salt chlorine generator for my pool and believe the board in the pics below is the cause. My question is, does ...
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3answers
59 views

Control overshooting

Suppose I want to control a portable electric stove in order to bring a big pot of water to, say, 70°C. The first thing that came to my mind was the simplest: use one of those power plug+termocouple ...
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2answers
90 views

Water level indicator LEDs one by one

I want to make a water level indicator but, instead of all LEDs lighting at 100% (for example) I want the top one only to light and the rest turn off at 0% all LEDs off at 25% the first LED on at 50% ...
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4answers
2k views

Is it possible for snow covering a car battery to drain the battery? [closed]

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?
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2answers
172 views

Is energy consumption of the 3kw kettle lower than 2kw kettle? [closed]

On the market there are 2kw 1.7 liter kettles and also 3kw 1.7 liter kettles. I understand that bringing the same quantity of water to the same temperature require same amount of energy, but from the ...
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67 views

Understanding electricity as water, what does it mean to "draw 30 amp"?

Is this analogy correct? Think of electricity as water. The source is a big basket full of water, wires are pipes. Turning a switch means opening a pipe; as the water flows it makes the engine turn....
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2answers
221 views

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 ...
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1answer
59 views

PCB surface finishing for underwater use

I need to find a very cheap way to detect water ad specific levels. No needs to have a linear measurement of its height. I'm thinking about a simple FR4 PCB, with several couples of tracks. Each ...
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0answers
40 views

Water damage repair on solders

So this is the cicuit for a 1h0257j VolksWagen polo vacum pump for central lock. I got it for practice since it was replaced. The question the problematic part seems to be a burned soldering, it is ...
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1answer
60 views

AC water sensor for electrolysis

I have 2 electrodes placed in a water bucket for electrolysis, electrode[A], and electrode[B]. I am supplying a positive DC voltage to electrode[A] and connecting electrode[B] to the ground and this ...
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1answer
119 views

Does anybody know a better way to cool a heatsink that is not a fan? [closed]

I am designing a portable distiller powered by the sun. I will be heating the water with a heating coil and then when the water evaporates I will be collecting the stem in a metal tube(not sure what ...
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2answers
83 views

Any DC-powered, fast water heaters,induction heaters? [closed]

Does anybody know a DC water heater? I am looking for a coil type design, so I can place it at the bottom of the container and it will get evenly heated. I need this to be DC and I am going to power ...
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1answer
182 views

Can you desalinate or distill water with a Peltier module?

Can you use both sides of a Peltier module to distill water? Using one side for heating and the other side for cooling. If so what type of Peltier module do you need and can you make it solar powered? ...
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2answers
59 views

Risks associated with water in a powered-off circuit

I think I understand fairly well by now why one wouldn't want tap water to get in contact with an electric circuit as it is conductive. However, assuming the circuit will dry out completely before it ...
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1answer
48 views

Transformer cooling difference between water cooling and air cooling [closed]

I just know air cooling method is cheaper than water cooling method. Please tell me what is the difference between air cooling and water cooling? And if you could please use some pictures to explain ...
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0answers
23 views

Ho can I light number of LEDs based on current flowing through circuit [closed]

I am trying to create a water tank level indicator which will have 2 wires going into tank one with resistors attached at increment levels and one simple wire. Is it possible to light up number of ...
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1answer
55 views

Auto off water pump only when tank is full

The water pump installed at my residence is operated on and off manually through a conventional switch wall socket. Now, I want the pump to be automatically switch off whenever the tanky is 90 ...
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2answers
205 views

Issue powering up a DC water pump with Arduino Uno

I'm having issues powering up a water pump I got from a little water fountain with an Arduino Uno. I don't have the reference of the water pump, but after testing it, it works perfectly well with 5V ...
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1answer
106 views

What size capacitor do I need to reliably close a 1" US Solid motorized ball valve?

I am making a water feature that will involve a stream fed by the basin of a fountain with a pump at the end sending water back into the fountain. To control the water flow rate through the stream and ...
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3answers
910 views

How to detect distilled water?

I'm trying to create a circuit that detects water, however, I'm looking for a very accurate circuit that can even detect distilled water. My current circuit uses an Arduino that has a pin constantly ...
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1answer
60 views

Does water damage explain this issue?

I posted previously that the hot water button (PA in red) no longer causes the hot water solenoid (Eac in red) to dispense water. It now causes the left coffee group solenoid (G1 in green) to dispense ...
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2answers
77 views

Electric Analogy to Hydro-Electric Power Plant

What is the right electric analogy for the system of power generation in hydro-electric power plants? I am especially curious in designing the surge tank with the symbols for electric components.
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2answers
92 views

Water's ability to short an L18650 cell?

Personally I no longer use 18650 cells, I use polymer packs with safety circuits. However having once or twice in the past I have briefly shorted a connection between the positive terminal and the ...
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2answers
104 views

thermal conductivity of a liquid cooler

I'm a high school student in a class called EDD, where we design a product and produce a prototype of said product. I have one issue though: My team bit off more than we could chew, and we have no ...
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1answer
336 views

Connecting Three 12V DC Water pumps to the same power source

I am new to all this and I am sure this is a very basic question, but wanted to ask before I fry some pumps up. I have a relay, which is controlled by my raspberry pi, switching the pump on and off. ...
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2answers
785 views

Can you die when your plugged-in mobile phone falls in the bathtub? [closed]

I have questions related to the safety of using mobile devices in the bathtub. I always thought the danger in dropping it or getting water on it is mostly to the device, not to the person, but a ...
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3answers
100 views

What methods are there for storing electrical potential energy in water vapor? [closed]

for an engineering class I had to create an electrical energy storage device and I began thinking about thunderstorms (I think it was a cloudy day) and how they create lighting. I know it's not ...
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1answer
73 views

Main water line TDS measurement grounding

I am trying to implement a TDS sensor to measure a main water line connected pipe, with circuitry that is powered from the wall. My TDS circuit is essentially a two electrode conductivity probe ...
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3answers
102 views

Water level sensor. How to read it?

I have a water level sensor in which by varying the level of the water, an inductance change his value in a mobile coil. The sensor have the internal simple schematic like this (i don't know the value ...
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1answer
76 views

How to detect electrical leakage in water tank?

I have a 50cm x 50cm x 80cm water tank and I am heating water with two 1500 watt water heater resistances. I think they are stainless steel or chrome plated but I am not sure about it, I can't contact ...
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1answer
45 views

Extension cord's power socket grounding pin soaked in cleaning agent sud, what is a proper way of cleaning?

I didn't really know what tags to use. Anyways, this might sound stupid, however I was cleaning up something above the extension cord which was laying on the ground, and while I pressed the wipe suds ...
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1answer
70 views

How can the dielectric constant of water be so high but water on electric devices can cause a short circuit? [closed]

Is it only the fact that pure water has a high dielectric constant and non-pure water i.e. the water that usually causes a short circuit is contaminated and it's the contamination mixture in the water ...
2
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1answer
1k views

Can WD40 be used to mitigate water damage on electronics?

I've heard the advice that WD40 is designed to repel water, and hence, it can supposedly be used to mitigate water damage in electronics. Such as for a device that was submerged, instead of simply ...
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1answer
82 views

Struggling to find a sensor to detect water depth that suits my purposes

I am new to finding sensors and not familiar with good resources to find what I need, so the answer may be simple. I have a small tank that I am controlling the water level in. However, the depth ...
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1answer
91 views

Water as a conductor and bubbles

I tried putting two extremities of a 6 volts battery into water. With salty water, bubbles appear close to the positive end. With unsalted water, what looks like a thin white foam starts to squirt ...
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2answers
77 views

Can I combine water turbine without power loss? [closed]

I have this small 12V water turbine generator. I connected one of these in a pipe running from a container on my roof to the ground. (height ~6m) and reached ~9V. If I buy 6 and put them one after ...
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1answer
390 views

Liquid / water level detection safely using AC voltage - Industrial circuit explanation

I am planning on working on a project to build a controller which will be used to detect the levels of water treatment chemical tanks and display them on a bar graph. then switch off the dosing pumps ...
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1answer
131 views

Refraction vs Reflection in Ultrasonic sensor for water level detection

I want to use ultrasonic module JSN-SR04 for detection of water level inside tank. The US module has single sensor for Transmission and Reception of US signals as shown below. I wonder if US sensor ...
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0answers
63 views

General Peltier (lack of) cooling - why?

The physics here are beyond simple. 1ml of water requires 4 watts of cooling to drop 1 degree C. Thus: 30ml x 4W x 33c = 3.96kW (IE cool 30ml by 33c needs 3.96kW of cooling) The TEC01-02015 spec ...
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2answers
2k views

What is the common name for this seal-in relay?

I'm trying to build a hysteresis water pump system with 2 water level switches. Please see the diagram and explanation of this setup I've taken off the web: The first switch (L) is set at the minimum ...
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3answers
1k views

12v nichrome wire water heater. Is it safe?

I want to heat the contents (water) of a two liter thermos flask using a low power (50-100 watt) 12 volt DC heater. Rather than buying a tiny little immersion heater, I've got some nichrome wire ...
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3answers
333 views

Sensor For Continuous Water Level Measurement

I am designing water level controller for water tank and want to show the water level in LED bar Graph I know how to transmit data to MCU and show level to LED bar graph but my problem is to find ...
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0answers
607 views

Water level sensor for a coffee machine boiler

I made a simple water level sensor with an Arduino. A digital pin supplies 5V to a probe in a coffee machine boiler. Boiler chassis is connected to AC ground (earth) and the ground to an analog IO ...