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Questions tagged [electricity]

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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.

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I am looking to minimize the size and assembly complexity of my arduino projects. Is there any easy way to integrate something like an esp8266 onto my own pcb. I don't want to have to solder it on. In ...
LMJ's user avatar
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recently in one of my projects I have wanted to make battery powered. I was wondering if I could connect the charger to the battery and the battery to the Arduino without blowing it. The battery is ...
alexlikesallthegamez's user avatar
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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 ...
cwright's user avatar
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I was wondering if it is possible to create diffrent voltages by just pulsing power into a capacitor, Im using an esp32 which can only output 3v or nothing on its GPIO pins, and i need to make it ...
Marius Wanscher's user avatar
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I have a 12V 20A Solar Charge Controller (which is part of my existing Solar Panel System Setup connected to a 12V Sealed Lead Acid Battery) that I will use to power up some pumps with the help of ...
princessbubbles15's user avatar
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I read the Arduino official docs on digitalWrite and am confused about what is happening from an electrical perspective when digitalWrite is invoked on INPUT_PULLUP pins. Say my code says this: ...
rfii's user avatar
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In my NodeMCU I want a statement to turn on an LED, which is easy, just use pinnumber, HIGH. But, what I'm trying to do here is connect multiple LEDs to one pin like this: I just wanted to know if ...
rohithrathod banoth's user avatar
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Im a complete beginner Im making a project using relay modules and arduino. but all the digital pins of my arduino are filled. I wanted to ask if i can use the analog pins to connect my relay module ...
rohithrathod banoth's user avatar
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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 ...
rohithrathod banoth's user avatar
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I’m using a 5v 20a power supply run through a barrel connector into an Arduino Uno to control an LED strip. When only the barrel is connected, the green light on the Uno comes on but the yellow light ...
Johnny Rollerfeet's user avatar
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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 ...
Damn Vegetables's user avatar
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I will show a connection diagram between my Arduino Uno and a DSC HS2032 panel (alarm system). The DSC panel uses 12V and I don't know the voltage fluctuation. The yellow and green are RX/TX ports. ...
John's user avatar
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i really love to make a lot of things but i always have this problem that i don't know how can i determine what battery(with how much voltage and amp)my circuit must have to work perfectly! please ...
amir's user avatar
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I'm using a 120 W DC power supply connected in parallel with ESC and Arduino nano through Vin. However, somehow the Arduino get fried near the CH340 chip, i.e. around the big black square chip near ...
ShoutOutAndCalculate's user avatar
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I am using line following IR sensor with arduino mega. I need the sensor 2-3m away from arduino since the length of rover is 2m (sensor front & motor back). However, I cannot get accurate analog ...
suu's user avatar
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I have the following circuit It has a simple dc motor that is OFF, and switches ON once a day for 2 seconds. I use MOSFET IRF540N as a switch I use L7805CV as a voltage regulator I would like to ...
yuria's user avatar
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So if my arduino will draw around 800mA @5V and the dc-dc buck converter around 266mA @5V plus solenoid 1.2A @12V, is it a good idea to get 12V 4A (48W) power supply? Since Filip Franik told me that ...
Fiery Kenichi's user avatar
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I am using a bi-directional 3.3-5V logic converter to control 5V relay with 3.3V D5 pin of nodemcu. link of logic converter is here However, I expected to control the relay but it didn't work. I don'...
Sultan Morbiwala's user avatar
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Is this battery: Polymer Lithium-ion Battery Model Number: PGEB014461 https://www.powerstream.com/p/PGEB014461.pdf Producing enough energy to power the following Arduino-micro project: ...
OakDEV's user avatar
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i'm just starting out with electronics and Arduino's and was wondering about the extent of an Arduino's ability. Will i eventually be able to program and power very high voltage/current requiring ...
ThisUsernameHasBeenTaken's user avatar
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I’m trying to use Arduino Nano to run my 5 V PC fan, which, I know it sounds crazy, it’ll be mounted on a piece of Tupperware that’ll control the airflow through it via the fan. However I have no ...
Amin Al Ashqar's user avatar
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I Want to measure AC current with current transformer but i dont know exact value of burden resistor or calculation formula...i want to measure current of borewell pump. company specified pump as 1....
Nikhil P's user avatar
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I want to use a load cell (Capable of measuring up to 1 ton) connected to a arduino board. I am a beginner, my questions are as follows : 1. How to calculate the current generated by the load cell ? 2....
Abhishek C. Gidde's user avatar
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I'm still learning the basics so please bare with me if something seems unclear ;-) I want to hook up an Attiny85 to a WiFi module (esp8266) and 2 sensors. The VCC will be provided by a battery pack ...
miccet's user avatar
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I am trying to create an electric meter reading setup for Arduino, and I have been searching for it and almost every posts available is using LDR sensor. http://www.reuk.co.uk/wordpress/solar/...
weyhei's user avatar
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7 votes
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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 ...
Bappa's user avatar
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We have an installation that provides: a common line (C), which divides into two wires; an input line (I), which carries the signal from a button (between I and C there's normally 0V, and 12V when the ...
nightcod3r's user avatar
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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 ...
Md Masudur Rahman's user avatar
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Beginner here: Would the circuit in the picture work or do input pins not absorb the energy as ground does? I know setting the pin as an input makes the direct 5V connection safe but maybe I'm ...
Aero96's user avatar
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181 views

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 ...
mrmojo6's user avatar
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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 ...
Alexandru Antochi's user avatar
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I am making a circuit without using a PCB or perfboard and i am unsure if i am running the ground wire correctly. I usually prototype on a breadboard with the ground all joining on the far right, is ...
Andrew Metzger's user avatar
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I am making an LED circuit for a Lobot (from star wars) costume headset that will not be on a PCB or stripboard. It will all be running inside the walls of the plastic shell I am making. Please see ...
Andrew Metzger's user avatar
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Is here some easy way to control bipolar motor without using any other external devices, drivers or shields? I have small motor from CD-ROM so I expect it's low voltage. By control I mean just ...
user avatar
2 votes
1 answer
534 views

I want to connect a TGAM module (detecting brainwaves) to an Arduino Uno. I know little of electronics, can someone advise me? To which pin of the Arduino should I connect the TGAM? How to get the ...
user32601's user avatar
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5 votes
3 answers
2k views

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 ...
karx's user avatar
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4 answers
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Maybe this is a question for Electronics SE but I’m not a member there yet so hopefully someone will have an answer here. I did an experiment with having some push-to-make buttons connected to my Uno....
Lefty's user avatar
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2 answers
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I have two polystyrene balls wrapped in copper tape. When the balls touch, the tape completes a circuit from a digital pin on an Arduino inside one of the balls to an Arduino inside the other (both ...
Craig Gidney's user avatar
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2 answers
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I have a breadboard connected to an Arduino Uno, 220k resistors connected to an led, of course it has a common ground and a pin connected to 5v. All pins are digital. Now, I want led 1 to turn on ...
Rusty Ryan's user avatar
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1 vote
2 answers
726 views

I am new to electronics and arduino in general. I need to split a power supply in gnd and voltage. Basically, the power supply has one single wire (with the voltage and the gnd passing through it i ...
Pietro Carrara's user avatar
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here is a very simple circuit, with a LED between pin 2 and ground, and a loose wire in pin 8. Here is the sketch that was intended for use with a small 4-contact switch like these in every arduino ...
pouzzler's user avatar
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1 vote
5 answers
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Guys please help me out in verifying my program for my project -- led fading effect using a push button. My project is simple, I want to start the LED fading effect (i.e., glowing and dimming one ...
MrDeepThought's user avatar
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2 answers
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I'm building a CANBUS network based on an arduino to go into an offroad racing truck. The vehicle has two separate battery systems, and I would like to monitor the voltage while still electrically ...
TheAutomator's user avatar
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2 answers
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Sorry if there is an obvious answer to this - I'm pretty new at Arduino and electronics. I've searched a bunch, but I think I'm too vague - and don't know what terms to look for. I have a pretty ...
brian h's user avatar
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1 answer
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I'm trying to track down a clearly/simply articulated piece of code to take a reading from the ACS712 current sensor (link to download PDF data sheet). I understand that these sensors are noisy, and ...
Grant's user avatar
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2 votes
4 answers
17k views

I have the following load cells: I'm using the following HX711 amplifier Every guide i can find on the internet describes how to connect a load cell with four wires to the amplifier. How can i ...
Peter D's user avatar
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1 vote
2 answers
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I have found a relatively small 12V switching power supply that I want to build into my device, using it to power both the Arduino Pro Mini and a couple of 12V cpu fans. Am I correct in assuming that ...
aelgn's user avatar
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2 votes
1 answer
454 views

I need to monitor voltages of several DC circuits in a generator's contact box. Whenever the generator has an alarm, a LED is lit in the box and voltage on the line drops to zero. I successfully get ...
Matt's user avatar
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4 votes
2 answers
875 views

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 ...
captainSpark's user avatar
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1 vote
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So this might be a total noob question (which admittedly I am) I have a Motor, if I connect it to GND and the 5V output it runs. Ok so far. But if I connect it to GND and a pin set to OUTPUT and HIGH ...
Victor Radu's user avatar
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