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Questions tagged [water]

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

1
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2answers
106 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 ...
1
vote
3answers
89 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 ...
0
votes
0answers
140 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 ...
0
votes
1answer
107 views

Avoid fire on a battery-powered device [closed]

I was trying to repair a battery-powered electric razor when I suspect there was a short-circuit. The device started heating and it began smoking a bit so I took it and put it in a bowl full of water....
0
votes
1answer
59 views

Water sensing circuit?

I was learning about GFCI and wanted to know if there was any easy way to create a simple circuit to detect when there is water. What I would like to do is make a LED turn on if a component (whether ...
1
vote
2answers
84 views

Tank Water Level Indicator Wire

I am building a simple water level indicator (approx like the circuit below) for my tank. However, I am wondering about the wiring, for I suppose copper cables corrode in water and produce toxic ...
2
votes
1answer
70 views

Point Water Level sensor

The company I work for uses conductive point-level water sensors to determine water level in a small tank. The manufacturer of these sensors has proven to have very unreliable quality control and ~30% ...
0
votes
1answer
40 views

Non-Corrosive Water Sensing

I have been told that passing DC current through two probes in water will lead to corrosion on the terminals. Apparently AC does not cause corrosion. Preventing corrosion is of high importance to me....
1
vote
2answers
94 views

ESD problem on water tank?

We have a water level monitor attached to a water tank. The water monitor has an hydro-static (output 0-5V) water sensor that goes to the bottom of the the tank. (See figure) In most cases this works ...
0
votes
1answer
86 views

Doubts in providing power to an LED

I am making a project on water level indicator. I've completed the circuit like this: The circuit is closed through the water. The problem is even before switching on the circuit, and with terminals ...
0
votes
3answers
74 views

Is a 5V DC Voltage @ 30mA applied, applied to water, unsafe?

As my question states, I have 5V DC, with an input current of 30mA, being applied across two exposed metal electrodes which are inserted into water. I am trying to measure the conductivity of water ...
3
votes
3answers
240 views

Flooded LAN RJ-45 connector may damage connected router? [closed]

I had an accident in the house and one of the LAN (cat. 6) cables including RJ-45 connector has been flooded. This "flooded" cable, along with other (dry) ones, was connected into a working gigabit ...
1
vote
1answer
169 views

Capacitive fluid level sensor design and insulation

This is a question regarding the measurement of a fluid level (in my case water) using a capacitive sensor. Capacitive sensors are a common topic, but I have one specific question: It is necessary for ...
0
votes
1answer
64 views

Safety for 48v leds in water

I'm builing a 48v DC LED system to be used inside a fountain in a public space. I'm using a 48DC 30A switching power supply. What should I do to make it safe in case any conductor gets exposed to the ...
8
votes
3answers
2k views

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 ...
5
votes
4answers
473 views

Will this water level indicator circuit work for my project?

I have only rudimentary knowledge of electronics so I ask for your forbearance. There are many water level indicator circuits, of the type shown below, listed online and demonstrated on YouTube. The ...
0
votes
1answer
393 views

Conformal Coating PC Parts?

I couldn't find any topics relating specifically to this sort of thing, and even tried asking folks over on Reddit at /r/buildapc, but I didn't get many responses or many people know if it would be ...
0
votes
2answers
131 views

Is it safe to apply a voltage to a cup of water, and then use the water in that cup as a voltage source for other electronics?

From research it appears that water level detection circuits, such as the one I have included below as a diagram, work on the principle that when the water is high enough to submerge both the +ve and -...
-2
votes
1answer
103 views

Help me identify a component

I'm trying to identify a component which I'm not entirely sure what it is. Here's an image: The component I'm asking about is circled in red. The product is a reader + transmitter for water ...
0
votes
1answer
488 views

Hall Effect Flow sensor output characteristic [closed]

The cheap and convenient hall effect liquid flow sensors available for a few bucks online nearly all cite the device output as being a square pulse train whose frequency is a linear function of the ...
0
votes
1answer
40 views

Is there a Certification requirement for device using mains power in/around water

Is there a device certification requirement when using mains power (60hz / 120V) in/around water? I'd like to market a custom fish-tank with integrated lightbulb and pump. The lightbulb won't be ...
-4
votes
1answer
64 views

Electronic urn pumps [closed]

How exactly do electronic auto dispensers/pumps, such as this one, work? What are the mechanics behind it? (I'd appreciate any information provided, even if it's a comment.)
2
votes
0answers
62 views

Need a simple buzzer/LED circuit for espresso machine [duplicate]

I have an espresso machine that I tore down, reassembled with fewer components then modified it to fit a specific setup -- kind of DIY project. The machine has an autofill circuit. After I removed ...
1
vote
1answer
748 views

Water level indicator with PNP transistor

I wanted to create a circuit that Lit's up an LED when water level rises to a certain level. I have created the following schematics following the https://www.electronicshub.org/water-level-alarm-...
0
votes
1answer
356 views

Sprinkler system - long wires or long pipes?

I am in the process of installing a sprinkler system using a commercial controller. There is quite an extensive area to be covered, and I am wondering whether, for the further-away sections, it would ...
10
votes
4answers
2k views

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 ...
0
votes
2answers
244 views

variable voltage divider using transistors

I found this schematic for a water level indicator: sensor schematic I would like to modify it some. Namely, instead of illuminating LEDs I would like to make it a variable resistor (aka make a ...
1
vote
1answer
132 views

Transimpedance amplifier circuit for water conductivity

I'm trying to understand the application of the water electrical conductivity measurement circuits based on transimpedance amplifier. Here the picture of general TIA configuration And here what I'm ...
0
votes
5answers
649 views

Measuring water level inside a drinking glass

Background: I am creating an automatic tea brewing machine using an Arduino and an electric water kettle from Amazon. My family and I drink lots of tea and we have many different sizes of glasses. I ...
-4
votes
2answers
1k views

reducing temperature of drinking water from 10c to 5c in 90sec using Peltier module. I have no background in physics so please talk simply [closed]

Right straight up I have no background in physics. I need to cool drinking water 1000ml in 90 seconds. I would like to cool the water to approximately 5c +/- 1c. The temperature of the water before ...
0
votes
1answer
738 views

Buzzer is not working

I am extremely new to electronics and stuff, I was trying to design a water level indicator. In Proteus, all the LED indications are working perfectly, but for some reason my buzzer won't work.
2
votes
1answer
107 views

What would happen if water splashed on a 12v power supply when under load? [closed]

If I am running a 40A 12v power supply at approximately 32A, and a large quantity of water splashes onto it, what physical effects will occur in a worst case scenario. I'm sure I can expect short ...
4
votes
3answers
2k views

Solar watering system for greenhouse [closed]

I wish to build an automatic watering system for my greenhouse and I would like to get some advice on how to do it. Here is a sketch of the greenhouse system: What I have right now: Solar Panel (...
0
votes
2answers
202 views

Trigger for a water sensor

I want to build a water sensor that disconnects the motor when: 1. tank is full 2. water in input pipe is missing. I came up with the following schematics (haven't practiced much electronics in ...
0
votes
2answers
115 views

MOSFETs leaks current between two water sensors

Goal: I've got a set of EC and pH water sensors that need to sit in the same batch of water / capture values real-time for a Arduino project. However my sensors cancel each other out when both are ...
-4
votes
2answers
287 views

How does water affect a flash mempory chip? [closed]

If a flash chip is thrown into water will it affect the data stored inside or will it still be recoverable? And if so, will this be a gradual process or immediate one? Are flash chips waterproof or ...
0
votes
1answer
163 views

Contact-less liquid level indicator [closed]

I am developing a Liquid level indicator to be used for my lab breaker. The purpose is to get real time liquid level data on computer for analysis. I have searched for many liquid detectors, but ...
4
votes
3answers
9k views

Building a pH meter circuit - is it feasible?

Let's say I have a budget of $15-20 to build a pH meter. I will then read the analog values from a microcontroller or such, but I want to first focus on somehow getting a reliable pH value on a ...
0
votes
2answers
600 views

What relay is suitable for a submersible water pump

I have an AC submersible water pump with the following ratings: Voltage: 165v-250v/50Hz Power 18W H-max 1.8 meters Output: 1200L/h My mains voltage is ...
3
votes
1answer
239 views

Dipole Sleeve Antenna design in fresh water - Transmission frequency and emitted power?

Hello dear antenna enthusiast, I would like to receive and emit EM signals with a dipole antenna in the range of **433.9 to 434.5 MHz in fresh water. So I chose a half-wavelength dipole sleeve-...
0
votes
1answer
137 views

Can Printed Circuit Boards or other electronic devices (Integrated Circuits, transistors) be damaged by water if the electricity is turned off? [duplicate]

Is it possible that electric or electronic devices be damaged by exposure to water if the current is turned off during their exposure to water and the electricity is switched back on only after the ...
1
vote
3answers
412 views

Non invasive sensor for water measurement in pvc?

Background I am on a project where they want a non invasive sensor for usage. There are many sensor available but they need to cut down the pipe to place within. Specifications Pipe is PVC 1-1/4" ...
0
votes
1answer
229 views

Distance tracking underwater

For a design project at school I need a way to track a short distance underwater (swimming pool). I have looked into programming an accelerometer to measure the distance traveled, but that is not ...
1
vote
0answers
509 views

Thermometer type in electrical water heater

I'm working on my home monitoring system and already succeed with electricity consumption measurement and got closer to water system. Measuring water consumption is almost solved, but as we are ...
0
votes
2answers
329 views

Low-power water level alarm

I'm trying to build a simple low-power water level alarm such that it could run continuously for at least 4 months on just 3x AA batteries. I've found this schematic which uses the 555 timer: However,...
0
votes
1answer
66 views

Heating water with electricity [closed]

Is it possible to raise the temperature of water almost instantaneously Using electricity ? I want to raise the temperature of tap water to 180 degrees F.
8
votes
1answer
412 views

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 ...
0
votes
1answer
99 views

can contactor, water level sensor and heater all live in parallel on the same circuit

I want to connect my 3000w (220v) water heating element to a 220v water level sensor Automático de Nível so that the heating element won't turn on when there is no water present. But the level sensor ...
1
vote
1answer
105 views

why do i measure a potential difference when I put my two electrodes in a water bottle?

I have a multimeter adjusted in DC tension mode. When I put my two wire connections inside a water container, I measure +120 mV or sometthing less but never zero. Why do I measure a potential ...
0
votes
2answers
114 views

Is it safe to build a floatable speaker?

I'm thinking of building a floatable speaker to float along beside me in a lake or a small river while tubing. I've got some speakers and the following 12V amp: DROK Amplify Module Audio Component ...