Questions tagged [water]

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

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iPhone damaged by water [closed]

My iPhone had water damage about 2 weeks not. It’s not charging. How can i retrieve the data on the phone specifically the photos, it was not backed on up iCloud. What are my options? Should I try to ...
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2 answers
92 views

Water level indicator using transistors

I'm trying to designing a water level indicator using npn transistor(BC548). I tried simulating the circuit on PSpice, but I don't know what to add for the sensor. I want a graph. The circuit will ...
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How to choose correct water pump for my hydroponic vertical farm

I am building a hydroponic vertical farm. I have 3 shelves and every shelf has one pipe. Also, I have two motors which are HX6540 and HX2500. Since HX6540 is very powerful, it fills the system very ...
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Using a voltage regulator dimmer with a 220V water pump

I am builgin a hydroponics vertical farm. The motor which I bought is too powerful (220V/100W) for my system so I want to reduce its power with using a voltage regulator dimmer. My motor has a ground ...
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2 answers
135 views

Small electrical water heater

When I was much younger than my current 64 years of age, I saw water heaters made using simply two single electrical 110 V wires and some form of a connection between the two, to simply stick in a cup ...
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The reason behind LEDS getting dim (Water level indicator using ULN 2003) [closed]

** Whenever I switch on the circuit, the LEDs glow fully for a second and gets off. After 2-3 seconds they start glowing slowly. What might be the reason for the above?
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1 answer
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Is there a fluid that visually displays electrical voltage/current?

I have a device that subjects fluid in a cuvette to a DC voltage waveform for a few seconds. The device is pretty powerful (lots of capacitors), able to continuously deliver up to 1,000 Vdc @ 40 A ...
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5 answers
138 views

How can a mobile phone being charged kill by electrocution?

We have in France a wave of warnings about using a mobile phone while being charged in humid environments (or when taking a bath). A charger is plugged directly into the wall socket and the charge ...
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2 votes
2 answers
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Modelling I2C capacitance for cables under water

My setup works fine with following combination of hardware: Raspberry Pi4 connected to a TCA9548A I2C Multiplexer from Texas Instruments, whereas each channel is connected over 4wires (GND, VCC, SDA, ...
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1 vote
0 answers
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Smart watchdog water alarm critique and questions

I've developed a smart circuit for the watchdog water alarm (teardown here)and I am ready to have PCBs made up. Before I do so I would like to get everyone's critique and as an amateur I do have a few ...
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1 vote
2 answers
99 views

Nodemcu: How to extend sensor wires?

I am using a Water flow sensor connected to v2 nodemcu. However, this sensor needs to be placed at a distance of 40 feets from nodemcu, on the 3rd floor of my apartment roof (I stay on 1st floor). The ...
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1 vote
1 answer
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how to detect water level using NodeMCU in overhead tank?

I am making a simple water level alarm connected to my V2 NodeMCU. Using the principle of water conductivity. Two wires with stripped ends are dipped into the tank. As soon as the water level reaches ...
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2 answers
131 views

How dangerous are high voltage batteries in water?

I am currently building an electric surfboard. The power source will be 16 li ion batteries in series to make a nominal 57.6 volts. My question is pertaining to the possibility of water flooding the ...
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Turn off LED when submerged in water

I want to do a simple project where an LED turns off when it is submerged in water. I thought this would be simple because when you short the two leads of an LED with wire, it just shorts the power ...
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1 answer
123 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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1 answer
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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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2 answers
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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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1 answer
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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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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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2 answers
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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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1 answer
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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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3 answers
68 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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3 answers
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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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6 votes
4 answers
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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1 vote
2 answers
336 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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7 votes
2 answers
285 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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0 votes
1 answer
81 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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1 vote
0 answers
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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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1 vote
1 answer
80 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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0 votes
1 answer
124 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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-4 votes
2 answers
84 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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1 vote
1 answer
244 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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1 vote
2 answers
68 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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-1 votes
1 answer
66 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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2 votes
0 answers
25 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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0 votes
1 answer
100 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 switched off whenever the tank is 90 ...
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0 votes
2 answers
308 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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1 vote
1 answer
143 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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4 votes
4 answers
1k 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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0 votes
1 answer
62 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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2 votes
2 answers
99 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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2 answers
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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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0 votes
2 answers
152 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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0 votes
1 answer
551 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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1 vote
2 answers
1k 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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0 votes
3 answers
104 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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0 votes
1 answer
78 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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0 votes
3 answers
119 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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1 vote
1 answer
105 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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