Arduino Stack Exchange
Arduino Stack Exchange

Questions tagged [electricity]

Use this tag to indicate the flow of electricity at higher voltage than that used in Arduinos themselves. Examples can include having an Arduino use a relay to switch the electricity for a 120 Volt device like a fan or a light.

Use this tag to indicate the flow of electricity at higher voltage than that used in Arduinos themselves. Examples can include having an Arduino use a relay to switch the electricity for a 120 Volt device like a fan or a light.

58 questions
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14 answers

Most compact method of powering Arduino from wall socket

There are a lot of methods to power an Arduino from a large range of voltages: USB cable from PC or from a phone charger or an USB hub step down converters step up converters switching power supply batteries (connected to the power jack or USB or…
vlad b.
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7
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2 answers

How to measure electrical conductivity using Arduino?

I want to measure TSS (Total soluble salt) in the soil. I have found in some literature that, through measuring of electrical conductivity, it is much easier to measure TSS. So, I thought, If I can measure electrical conductivity, it might be…
Bappa
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6
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2 answers

How to measure voltage with Arduino analog input

I'm totally new to Arduino and to electrodynamics in general. I'm wondering what happens if I connect my digital pin to an analog input on Arduino, and make digitalWrite and analogRead on the according pins. Here are the options I can think…
roman-roman
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6
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1 answer

How can Arduino control with a servo with only one wire?

I was playing with getting my servos to be on dedicated power, separate form the Arduino entirely, but obviously controlled by the Arduino. I originally had the ground of the Arduino joined with the - of the battery, but to my surprise my Arduino…
Alex Wayne
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5
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1 answer

Touching a capacitive button, non-mechanically

This is not about using a capacitive button to control an Arduino; it is the opposite. I would like to "touch" a capacitive button on another conventional device. There could be a way like actually moving a finger-like stick and touch the button,…
Damn Vegetables
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5
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3 answers

How to power my Arduino mini using wall socket?

I am trying to power my Arduino Mini (which is connected to IR receiver and a relay board). The idea is to hide the entire setup behind the electrical board including the power supply. I have hacked more than a few power adapters (ranging from…
karx
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4
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2 answers

How to protect my arduino, while hotplugging its power supply and other related electronics

The unsolved: when I connect power and signal lines to my Arduino - while power is on - I potentially kill it. I have fried 2 so far. Situation: I have build an DMX-controlled lighting fixture, which consists of the fixture and a Controller…
captainSpark
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3
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2 answers

How can I check if my thermostat is on?

I'm working on a project to better understand how my home cooling system behaves. I'd like to produce graphs of temperature in various areas, overlaid with when my existing thermostat turns the A/C compressor and fan on. Connecting up a few…
cwright
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3
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3 answers

Powering on the PC

I located the two pins that are responsible for powering up the PC. They are connected to the Power On button and one pin has an output of 5 V while the other is the ground. So far so good, the problem is when I connect the 5 V one to the Arduino…
Alexandru Antochi
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3
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2 answers

What sensor would detect the black stripe on an analog electricity meter?

I have an analog electricity meter (AEM) and I would like to track my usage of electricity. I've attempted to use the EE-SY310 photo sensor, but that's not sensitive enough it seems. I suspect the black stripe on the dial is too thin to be picked…
Jose Leon
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2
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1 answer

Can I use relays with 10A125V~ for my 220V~ applications, safely?

I am using the TinkerKit Relay Module and recently they changed the relay mounted on the board from a white one with 10A250V~ to a black one with 10A125V~. In my country the voltage is 220V~. Can I use the black relay in my application, safely? May…
user502052
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2
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1 answer

Which relay module to buy and what is the difference between 1 channel and 2 channel relay boards

I wanted to d a simple circuit using Arduino to control the lights in my house. But i do not know which relay module to use my house runs on standard 220v ac. Can anyone tell me weather this relay board will be…
rohithrathod banoth
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2
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1 answer

Circuit diagram interpretation and electrical flow

I'm new to Arduino and consequently, to circuits. I've been reading Arduino Robotics by Warren and this was a circuit present in the book. From what Warren has said, electricity in the circuit travels from the negative pole to the positive, BUT to…
Amber
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2
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check if a fuse is good or bad in an ac circuit using arduino

I have a fuse in a ac circuit of which i want to check if the fuse is ok or not. I'm wishing to wire up two nodes of the fuse holder and determine the fuse status. I have a plan of notify user if the fuse is ok or not. How can I do that using…
Md Masudur Rahman
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2
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2 answers

Grounding for arduino, measuring phase controllled 240V

I would like to measure a phase controlled 240Vac waveform as a digital PWM input for an arduino. The signal would look something like this: My intent was to use a zener clipping circuit to limit the positive portion of the waveform to 5V, and…
mrmojo6
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