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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questions with no upvoted or accepted answers
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Arduino R3 Uno Clone - When barrel plug connected there is 5V on USB. Why?
I have been using Arudino Megas for some projects and never had this problem.
Simply enough - I am powering arduino with 12V in via barrel and take power out via VIN to 12V low very low current small ...
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2
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0
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Help needed with driving multiple stepper motors on arduino UNO
I am brand new to Arduino but have good experience with Raspberry Pi's and Microchips.
My problem is that I am having trouble driving many stepper motors at once. I am using the AccelStepper library(...
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Voltage on open circuit jumping on Arduino R3
I am working with a bunch of sensors and everything is fine so far, but I figured on analog PINS 4 & 5 the output voltage read is 0.09V higher than on 0-3... for my Sensors this is a crucial issue....
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How to get power for a nexus 7 while reading serial data from an arduino over usb?
Does anyone know how to simultaneously power a Nexus 7 tablet while simultaneously reading serial data from an arduino over USB? I have had quite some trouble with this and have attempted multiple ...
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Attiny88 problem with LEDs and voltage
I have the following problem and wonder if anyone may have some inside into what may be happening.
I have an array of 20 leds that i manage to multiplex using the attiny88 using only 9 pins (4 ...
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2
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How to splice into existing buttons?
I want to control a kettle. It has 4 buttons and a digital disply of the temp. I would like the buttons and disply to remain functional. I just want to make the buttons remoteky pressabke. The buttons ...
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Arduino based temperature sensing circuit
I've currently got a setup where I am using a 2 thermocouple setup using MAX31850 and the circuit looks exactly as mentioned here using the external power option. (https://learn.adafruit.com/adafruit-...
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2
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Connecting Indicator LEDs to Arduino Pro Mini
I'm new to electronics and unsure whether my design below will work as intended. XBee Series 2 and Arduino Pro Mini 5V are used. There are 4 LEDs, each with the following roles:
LED1: Flicker when ...
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1
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I2C and logic shifter troubleshooting
I'm attempting to use a SparkFun bidirectional level shifter (Link here) to connect up a 3.3v wii nunchuk to a 5v Arduino Uno circuit. For now all I'm trying to do is write the position of the ...
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Using a level converter to adjust the voltage levels
we are currently working on a device that needs us to connect an sd card reader to 2 Arduino’s ( Uno and zero) , however, we just found that it is not possible to do so without a level converter , may ...
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MQ-4 Sensor working fine with Beetle Bluno BLE but not with Arduino Nano 33 BLE
I have an MQ-4 sensor connected to a Beetle Bluno BLE that seems to work fine, however, when I change the board to an Arduino Nano 33 BLE, the sensor doesn't seem to work well (I get an arbitrary ...
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Motors would make the car go extreme left instead of forward (Self Driving car)
This is my very first day in the community, please bear me until I make myself comfortable here.
Coming to my question,
I'm making a self Driving car.
My car instead of moving forward it moves on the ...
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1
vote
0
answers
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Voltage to keep my board safe
I have recently made a home automation system using node mcu and relay module and i am powering both together using my 5V ,2A dc adapter and i am scared that if I'll keep using it for very long hours ...
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Checking Arduino 5/3.3V under load
Is there a way to use common/cheap components to put the 3.3V and 5V pins on an Arduino under load, in order to measure if they are giving a correct and stable voltage? Can I calculate a certain load ...
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5V MCP2515 to 3.3V Teensy. How to reduce the MISO voltage
So to try and speed up my project, I have moved from using two UNO's to a UNO on the receive side, and teensy 3.6 on the sender side. However, no dice. The UNO doesn't receive any data or even try to ...
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1
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0
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Serial communication between two microcontrollers w/ separate power supplies
Fair warning: I'm an electronics n00b.
I'm trying to get an Arduino Uno R3 to send data over 9600 baud serial to a Wemos D1 Mini Pro.
What worked (mostly):
Powering (5V) Arduino off a 4 AA barrel ...
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1
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0
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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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Arduino Uno RFID-RC522 won't scan any card or tag
So I bought a RFID-RC522 module with a blue tag and a white card, and I searched for tutorials and found this library that I used it.
and here is my code :
#include <MFRC522.h>
#include <SPI....
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1
answer
751
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ESP32 struggling to trigger relay module consistently
I'm working with a 4-channel, 5 V relay module and an ESP32 which operates on 3.3 V.
The setup seemed to work well initially but I have started experiencing some inconsistencies. One of the four ...
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channels on logic level shifter outputs high
so I have a logic level shifter which is TXS0108E ,I use it to shift the eps32 ouput volatge to 5v to be used with motor driver ,when I test it with multimeter , all the channels on the B side outputs ...
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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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Why i cant power up my esp using the 5 volt from the step up converter?
I'm not an expert, so I'm not sure if what I'm doing is correct. I'm trying to power my ESP using the 5V pin. I have a circuit that runs on a 18650 battery, which provides 3.7V. To increase the ...
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1
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Can the Arduino Uno use a negative supply voltage (0V & -5V)
I acquired a bread-making machine. See control board image.
I want to use the machine for other purposes and control the buttons, paddle, heater & 7-segment display with an Uno.
As it stands, the ...
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1
answer
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What is LCD bias voltage and where do I have to connect it?
I noticed that I have VB0+, VB0-, VB1+ and VB1- pins on my LCD. In the datasheet it says they are for the "LCD Bias Voltage". I have never heard about that. So what is it? Where do I have to connect ...
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