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Questions tagged [water]

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

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Water wheel turbine project [closed]

I want to design a water wheel turbine, where the inlet flow is 25 liter per second and the jet diameter is 100 mm and the maximum allowable wheel diameter is 1 meter. The target is to get the maximum ...
Ahmed Elshall's user avatar
3 votes
6 answers
261 views

Water level monitoring: simplest way

I like to develop a water level monitoring for my cistern tank: empty level, low level, mid level, high level. One of my booster pumps broke because it runs even when there is no water in the cistern ...
Carlo S's user avatar
  • 31
5 votes
4 answers
1k views

Is it possible to do water detection with a single electrode?

I need to detect the presence of water, but there is a catch. I can only have one single electrode contacting/submerged in water. It is in a mini-tank made of plastic (for a handheld device) so I ...
nk13's user avatar
  • 65
2 votes
2 answers
911 views

If a shipboard antenna isn't "grounded" to the water on a fiberglass-hulled boat, would using the radio (TX or RX) attract more lightning?

Because of my poor understanding of the interaction between static and flowing electrical charge, I don't trust my intuition about the answer to this question. Essentially I'm asking if there could be ...
rccapps's user avatar
  • 33
0 votes
1 answer
81 views

What is this electro mechanical sensor from a washing machine?

I am taking apart an old (2010) washing machine as a passtime, perhaps some day assemble a garden watering device out of the parts. What would the pictured device be? The white tube was sealed against ...
Vorac's user avatar
  • 3,131
2 votes
2 answers
93 views

Modifying a TDS Module for Higher Electrical Conductivity Measurements

I recently acquired a Keyestudio V1.0 TDS module, primarily used for measuring the electrical conductivity of water. The module is recommended for 0-1000ppm or 0-2000μS/cm measurements. However, my ...
Fatihy's user avatar
  • 41
0 votes
1 answer
71 views

Peltier-based liquid cooling system

I-m doing a liquid-cooling project for fun, and, well powering it and cooling the hot side seems borderline impossible. I need some help. To clarify. This is literally only to cool water, and not to ...
Александр Ананьев's user avatar
2 votes
0 answers
60 views

Sensitive electrical flow switch for 1-1/4" plastic pipe

As part of a water-treatment system without a holding tank, a chlorine pump is installed on a 1-1/4" water LDPE pipe. To test for flow, a section of the pipe was replaced with 2" PVC, and in ...
Conrado's user avatar
  • 121
5 votes
2 answers
768 views

Is USB-C unsafe in humid/water conditions? [closed]

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 ...
WoJ's user avatar
  • 517
1 vote
2 answers
82 views

Creating a thermostat regulated water heat bath that won't electrocute me if I touch the water

I have a basic knowledge of electronics and an even better knowledge of film photography. I'm looking to create my own heated water bath with a thermostat that will allow me to adjust the temperature ...
nizzlebizzle's user avatar
5 votes
2 answers
1k views

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....
Outis Nemo's user avatar
0 votes
1 answer
327 views

Washing potentiometers with de-ionized water, or with distilled water?

I am aware water conducts electricity because of its impurities. However I am not sure if distilled water is pure enough to be safe to use to wash the potentiometers(and electronic boards in general), ...
komrad2236's user avatar
0 votes
4 answers
212 views

Can I use a plastic water tube as resistance to protect bathing people within a safe voltage?

Suppose home water has a resistivity of 2 Ωm, home electricity is AC 220 V, and human body in shower has a resistance of 1 kΩ. Then a resistance R = 8.2 kΩ, which is a plastic water pipe of 1.29 m in ...
PineapplePie's user avatar
0 votes
2 answers
544 views

Why are two 555 ICs used in this automatic plant watering system's circuit diagram?

I have been working on this project but couldn't figure out why two 555 ICs are used and how they contributed to the operation.
Shoeb Akter's user avatar
3 votes
1 answer
406 views

Water level indicator LED lights up even though circuit is open

I have built a water level indicator with a 555 timer. The supply is a 12 V SMPS adapter, the output of 555 timer is a square wave with a 21 kHz frequency. I pass this signal into AC coupling to ...
Dhaval's user avatar
  • 41
1 vote
1 answer
123 views

How to check the functionality of all the pins on stm32?

What happened: I was carrying my stm32 f401re inside a bag, and there was a little droplets of water inside the bag, when I removed the bag the MCU was wet, I wiped it gently on my clothes before ...
Mustafa Issa's user avatar
0 votes
2 answers
368 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 ...
Saf's user avatar
  • 1
1 vote
4 answers
810 views

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 ...
laika's user avatar
  • 29
0 votes
2 answers
223 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 ...
dj drew's user avatar
  • 29
0 votes
1 answer
240 views

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?
Rafi Md.'s user avatar
0 votes
1 answer
68 views

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 ...
Intrastellar Explorer's user avatar
0 votes
5 answers
258 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 ...
WoJ's user avatar
  • 517
2 votes
2 answers
207 views

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, ...
Marco Bobinger's user avatar
1 vote
0 answers
82 views

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 ...
Hartman9's user avatar
1 vote
2 answers
200 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 ...
jerrymouse's user avatar
1 vote
1 answer
173 views

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 ...
jerrymouse's user avatar
0 votes
2 answers
612 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 ...
koolzr's user avatar
  • 11
0 votes
2 answers
117 views

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 ...
DragonflyRobotics's user avatar
0 votes
1 answer
520 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?
Warriorrev6300's user avatar
0 votes
1 answer
150 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 ...
Erik Andershed's user avatar
0 votes
2 answers
232 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 ...
Matěj Kopecký's user avatar
0 votes
1 answer
149 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 ...
sam's user avatar
  • 101
0 votes
0 answers
105 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 ...
tibi10's user avatar
  • 41
0 votes
2 answers
746 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 ...
Dvidd's user avatar
  • 11
0 votes
1 answer
77 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 ...
eddiewink's user avatar
0 votes
3 answers
323 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 ...
Lilla's user avatar
  • 109
0 votes
6 answers
315 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% ...
Seif_1999's user avatar
6 votes
4 answers
3k 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?
a coder's user avatar
  • 175
1 vote
2 answers
849 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 ...
user2299523's user avatar
0 votes
0 answers
87 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....
Manu's user avatar
  • 113
7 votes
2 answers
427 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 ...
Sredni Vashtar's user avatar
0 votes
1 answer
113 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 ...
Mark's user avatar
  • 1,197
1 vote
0 answers
103 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 ...
Anonymus51's user avatar
1 vote
1 answer
216 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 ...
user3560453's user avatar
0 votes
1 answer
345 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 ...
Rahul Vijayan's user avatar
-4 votes
2 answers
147 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 ...
Rahul Vijayan's user avatar
1 vote
1 answer
457 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? ...
Rahul Vijayan's user avatar
1 vote
2 answers
98 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 ...
Bernardo Sulzbach's user avatar
-1 votes
1 answer
145 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 ...
LEO's user avatar
  • 1
2 votes
0 answers
26 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 ...
gagan deep's user avatar