Questions tagged [voltage-level]
Voltage level should be used for questions that are referring to using hardware together that operates on different voltages (the "concentration" of electricity).
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How to switch a low-voltage (1.5V) toy motor with an arduino?
I would like to add an Arduino to control a toy with a 1.5V battery and motor in it. The toy is currently controlled by a SPST switch in series with a single 1.5V AA battery and a cheap motor.
I ...
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Using 5V microphone module with Wemos D1 Mini Pro 3.3V analog pin
I want to read values from this microphone module using Wemos D1 Mini Pro analog pin. Unfortunately, this module operates on 5V, but the analog pin on Wemos has range 0-3.3V. I have tried to use a ...
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Connect optocoupler 4N35 to Arduino Uno to control LED light strips
I want to use an Arduino Uno to control the LED light strips, based on the input signal from a robot controller. The robot controller sends a digital signal with "HIGH" of 24 V and "LOW" of 0 V. I ...
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5v input on ATmega328p running on 3.3v
The ATmega328p can run on 5v but will it cause problems if it runs on 3.3 v and one input signal is 5v?
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Which voltage should I use with a component that allows between 3v and 5.5v? [closed]
I have a DS18B20 temperature sensor that needs between 3v and 5.5v to work, as seen in its documentation.
What's the difference? Should it work better which 5.5v?
I know that a LED with more voltage ...
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Can I change Vcc to some other pin?
I was working on an Arduino Uno and while carrying it to my teacher the wire's pin got stuck into the Vcc of 5 V. Can I set Vcc to other inputs? If so, then how?
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Can I use a 3.3v GPIO to control an opto-isolated 5v relay board?
I am working on a DIY home automation project using a Wemos D1 Mini as the controller, and I ordered some 4-channel 5v-triggered relay boards. The ESP8266 that Wemos D1 Mini's are built on has GPIO ...
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Is it right to connect Serial module directly? [duplicate]
I find a strange thing that the led is on when power is off. And it's the problem of my serial module. Arduino may get power from my serial module. My serial module use max2322. I don't if it will ...
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Non intrusive current sensor with unreliable (strange) readings
I have a project where I will mount 6 non intrusive current sensor model SCT013 (100A/50mA) manufactured by yhdc.com on an Arduino Mega.
Virtual ground and Burden resistors are 1% tolerance.
To ...
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Can't flash ESP8266-01 with Sparkfun FTDI basic - wrong direction/command
Connections:
RX -> TX
TX -> RX
GND -> GND
VCC -> 3.3v
CH_PD -> 3.3v
GPIO0 -> GND (flash mode)
Click the picture to make it larger/more readable.
I am trying to flash an ESP8266-01 ...
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Voltage divider for 6 non intrusive current sensors
I have an Arduino project where I intend to use 6 non intrusive current sensor model SCT013 (100A/50mA) manufactured by yhdc.com
As reference voltage on examples I find at the internet it is ...
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1
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Can I use the Arduino Uno's 3.3v pin while powered by a 9 volt battery?
I have an Arduino Uno. It has a 3.3v pin that I would like to use to power another module that requires 3.3v, and nothing more. If I power my Arduino Uno with a 9 volt battery, will this pin output 3....
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Sensors go crazy on external power
For few days, I am trying to figure out, why my sensors do not work on external power. I bought NodeMCU along with couple different sensors etc. I was happily working with them, connecting them one by ...
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Arduino (or clone) powered with one or two AA batteries or one CR2032, but still able to give +3.3V or +5V
Are there Arduinos (or clones) that can be powered with one or two AA batteries or one CR2032 3V battery? (it would sleep 99% of the day, and only send a few bytes per day)
If so, will they also have ...
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How can I wire a 12V LED switch so that it is powered, but my Arduino only receives a 5V signal?
My arduino is powered by 12V. I am getting some cool looking 12V led switches from amazon, but they need 12 volts to light up. My arduino will perform an override function when it detects the switch ...
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Trying to flash ESP8266 with Arduino UNO
This is my first project other than some of the starter projects. I am trying to flash the firmware onto an ESP8266 wifi module using and arduino uno. It would be nice to know if anything is wrong/...
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ESP-01 adapter and logic level converter
I read that I'll need a logic level converter like this to run an ESP8266-01 from the Uno.
But I saw this ESP adapter:
http://www.ebay.com/itm/ESP-01-ESP8266-Serial-Wi-Fi-Wireless-Adapter-Module-3-...
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Analog output low voltage issue, how to troubleshoot
I have connected my arduino according to the schematics in the image, with a few additions.
The setup
A DC motor (water pump) drawing power from Vin, going to ground via a transistor based in A0 ...
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Arduino Pro Mini maximal and recommended current per pin
In Arduino Pro Mini (3.3V) specs indicated the maximal and recommended current per pin, 40mA and 20mA respectively. Does these values means input current (i.e. safe input current Arduino can handle) ...
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How to understand the "power economy" of a voltage up-converter (boost converter)?
My online video Arduino instructor makes use of various devices to amplify signals, currents, and voltages. This seems like magic to me.
For instance, he has 4 AA batteries with 1.2V each. He says "...
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Arduino 3.3V Conversion
I am fairly new to Arduino. As far I know all official Arduinos run on 5 volts. Or there is Arduino versions that run from 3.3V? I need use Arduino with devices which chipsets all use 3.3V logic level....
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How to map sensor analog output voltage
My sensor output voltage values ranges from 0.6 V - 3 V. How can I convert this voltage values to ppm in the range 0-1000? Upon exposure to CO gas: 0 ppm = 0.6 V , 500 ppm = 1.52 V and 1000 ppm = 3.01 ...
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Convert from 3 V to 5 V
I'm new to Arduino, electronics, and this forum.
I have made up a little project that connects an HC-SR04 ultrasonic range detector, and displays the distance on a 4 digit, 7 segment LED display.
...
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Connect Arduino Uno RX/TX to 3.3v NEO-M8N gps module
I'd like to connect an M8N gps module to an Arduino Uno. From what I understand
the Arduino pins 0-RX/1-TX work on 5V
the M8N RX/TX work on 3.3v
the sensor-TX sending to the Arduino-RX should work (...
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Stable temperature sensor under voltage fluctuations
I'm looking for an inexpensive temperature sensor which is non reliant on the input voltage to return an analog reading back or some sort of digital signal. Accuracy is not very important, for ...
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Problems with ACS758 Hall Effect Current Sensors - Calibration and no Signal
I purchased 3 ACS758 Hall Effect Current Sensors datasheet on ebay. A 50,100 and 200A, all three are bi-directional. They look like this.
With no current the 50A outputs 477 on the analogue input (2....
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How can I2C be made to work through a level shifter?
I am attempting to use a bi-directional level shifter for an IMU to shift the SDA and SCL lines in an I2C implementation, however cannot get the level shifter working with the Arduino at all. It feels ...
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Arduino 101 I/O voltage levels
As per the Arduino 101 schematic.
The Arduino 101 has level shifters (TI make LSF0108) connected to the I/O ports I guess these are to make them Arduino compatible(5V) since the Intel Curie Module is ...
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Understanding schematics: resistors attached to Attiny85 pins V-USB
I'm currently trying to create my own Attiny85 usb thumb(to mimic an joystick). I understand that I have to limit the voltage on the attiny's pins that are connected to the D+/- pins from the usb. In ...
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Arduino/Genuino 101 5 volts pin
Still trying to understand the nomenclature of the pins, I am confused of what's the function of the +5V pin, as I read that the 101 should not operate at that tension.
What's it for?
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Atmega328p low voltage [closed]
I am using atmega328p in my PCB prototype, due to some reason I can use only 4 volt for power supply.
My question is that
"How to run atmega328P through 4 voltage"
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1
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Logic level converter not working?
I'm trying to connect a 3.3v depth sensor to an Arduino uno. The logic level converter does not seem to send any current over (the sensor does not work and the voltmeter reads nothing). I tested the ...
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Does ADC conversion to a voltage rely on the actual value of the +5 V pin?
Questions:
Does the conversion of the ADC count to voltage depend on the actual voltage of the +5 V pin?
If yes, what is the accepted method of getting that voltage from the board?
Background/...
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7805 powered Atmega328 Stops working when input of 7805 exceeds 7volts
I am developing a circuit with atmega328, the MCU is powered by a LM7805.
The input of 7805 is given by a variable supply. Till the input of 7805 is 7volts, the output voltage is 4.9volts and current ...
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From Exploring Arduino Text
I am working thru the Exploring Arduino text mostly with success up until chapter 4. I have most of the parts required but for Figure 4-3 I used the following:
100nF Capacitor, (In place of 1uF ...
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2
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ADC with better performance
I need to sample voltage at a very high rate (say for like 10000 Hz) and with a very good precision(at least 10-12 bit ADC will do). So I am in need of an Analog-to-Digital Converter(ADC) which has a ...
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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 ...
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Voltage and Current and Arduino
I put a LED into 3.3V of the arduino and Ground, and it blew my LED violently, smoke was everyone, the whole half top of the led blew up across my room.
However, when i program the arduino with Pin13 ...
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Am I able to connect an anti static wrist strap to the ground pin on the Arduino uno?
So you have the pin on the arduino uno which is ground, are you able to use a jumper wire to send the ground source out the other end of the wire to the alligator clip for the antistatic wrist strap?
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Powering Arduino Uno from 5V pin, what exactly is the voltage range/tolerance?
I want to bypass the onboard regulator and use the 5V pin to feed arduino with external, regulated source.
Everybody just keeps saying regulated 5V, but how precise does the regulation need to be ...
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Building a low voltage disconnect w/ timer - need help with the timer
I'm trying to build almost exactly this device:
http://www.reuk.co.uk/wordpress/reuk-shop-low-voltage-disconnects-lvd/buy-reuk-programmable-low-voltage-disconnect-with-display/
It is a low voltage ...
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Fan dropping voltage?
I have students using an arduino to control a fan. We have multiple types of fans. We want to turn the fan off/on with digital HIGH. When the 5V fan is plugged into 5V and ground, it runs. When I ...
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Is it better to use Vraw or Vcc on Mini Pro?
I have 12V and 5V power available. Is it better to feed the 5V through the Vcc pin or either the 12V or 5V through the Vraw pin?
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WS2812 - First are white and then they turn red/yellow/orange near the end
I'm trying to power about 150 WS2812 LEDs from my ESP8266 NodeMCU board (running NeoPixel Arduino code). The first few LEDs are white, but about half way down, the LEDs turn yellow, then they turn ...
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System voltages: Can I use a 5V touchscreen shield on a 3.3V arduino?
The system voltage on my arduino 101 is published at 3.3V, even though it also has a 5V output pin.
My Seeedstudio touchscreen is supposedly a 5V device. http://wiki.seeed.cc/2....
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Should I use LLC to power sensors on grid pcb at 4mtr wire length distance?
I have setup a grid pcb that further distributes power and receive signal from sensors, I know low voltage can detroit if not damage sensors , so I am thinking to put BD-LLC to distribute power ...
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Arduino (weird) ADC problem
I'm trying to read to voltage output of module ACS712. Here is my problem: The module outputs a voltage around 2.5V, however, arduino sends the value "1023" to the PC. (Gives a reading of 5V).
...
user29094
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How to output a true analog voltage at output pin
Regarding my program, it is a program that does some calculations and then outputs a voltage based on the result using analogWrite function. However my problem is that I had done my programming based ...
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Measure voltage of data output?
I'm trying to control a few NeoPixels using a 3.3V Particle Photon.
I've got a 5V power source that I'm using to power the NeoPixels (as they require that voltage. That works fine.
Them I'm using a ...
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Is my Arduino possibly broken?
We work in groups on a project at school. We had to build an electric scheme with an Arduino to make a small car moving.
We got the parts from our school, except the Arduino (we had to buy it ...
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