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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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 ...
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How to program ATTiny85 running 3.3V
I have a working project built around ATTiny85 on a breadboard running at 5V. Now I want to move this prototype on a PCB where it will be powered from batteries. All components used are capable of ...
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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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How to choose between Lithium-ion vs NiMH batteries to power Arduino on the go.
For my next project I'd like to use a battery pack to power my Arduino.
I would also like to get a small solar panel and charging module to charge these batteries when possible (during the day).
What ...
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Arduino ADC read bad value
I have an Arduino device and I'm trying to read two voltages. The first one is the Arduino Vcc by using the bandgap value 1.1V (this requires raw access to registers since it's not implemented in ...
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How to identify Arduino Mini Pro 5v vs 3.3v
I have many Arduino Mini Pro, every from different seller.
Few are 3.3v and most 5v.
I had to clean table for Xmas and now I do not have any idea how to identify 3.3v Arduinos.
They do not have any ...
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Connecting a LSM9DS0 9DoF module to Arduino Uno
I got a bit confused by Sparkfun's hookup guide for this 9DoF breakout module.
It says the VDD-in on the breakout "should [get voltage] regulated between 2.4V and 3.6V", yet in their example they do ...
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Set Arduino digitalRead reference voltage
I wanted to know if the reference voltage for the digitalRead() function could be set to a particular voltage, either with an external reference or internally.
In the Arduino reference under the ...
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Arduino and Raspberry Pi - 5V/3.3V I2C
This topic have been covered in various places, but I still think it hasn't been thoroughly explained anywhere. Doing google search on connecting Arduino to Raspberry Pi via i2c gives for example, ...
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5 Switches 1 AI pin
Im starting to get into Arduino a little. Ive got a Small project to start me off,
To keep it simple its: 5 level Switches, 1 flow switch and 3 solenoid valves.
This question is for the Level ...
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Arduino DUE and optocoupler 4N25
I'm using an Arduino Due board with an optocoupler 4N25 to simulate a button pressed.
I have to open and close a circuit that drive an actuator. In that circuit, when connected, with the tester I'm ...
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Convert Arduino Pro Mini 5v to use 3.3v
Id like to make my 5v pro mini use 3.3 v instead of 5 because i want to use it in an existing piece of electronics that uses 3v throughout.
Looking at the specs for the pro mini it says the 3.3v ...
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Wiring 5V ultrasonic sensor to Arduino Due
Is it possible to use the 2760342 ultrasonic range sensor with an Arduino Due? The docs say it takes a 5V input, but doesn't specify the output, but I'm assuming it also outputs a 5V signal. Does this ...
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Determine difference between 3.3V and 5V shields
How do you determine if an Arduino shield uses 3.3V or 5V on their pins?
Previously, I thought all Arduino shields used 5V, since that's what most Arduinos use. However, I've been researching ...
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Powering a 5V Arduino Pro Mini with 3.3V
I want to run the 5V board at 3.3V because I can get the 5V version cheaper than the 3.3V version.
I read that you can power the Arduino Pro Mini with a battery by connecting the battery to the 5V ...
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What does the datasheet information for a switch mean?
I'm clueless when it comes to the information on datasheets for switches. When I see a datasheet for LEDs or servos, I'm used to seeing a fairly straightforward call out for the required volts and ...
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Where can I find beginner resources on using voltage regulators with Arduino circuits?
I'm trying to concurrently learn electronics and Arduino, and have recently moved from simply powering LEDs to servos. In all my attempts with servos and reading about them (especially multiple ones, ...
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How do voltage and resistance work for two 5v servos when using an external 12v power supply?
I have a 12v/1.5 amp barrel plug power supply on my Arduino Uno. I have two servos that say they are rated for 4.8v to 6v, but no amps are specified. When my circuit is configured as it is in this ...
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What are the 5V and VIN pins for?
I believe I can supply the Arduino with power in three different ways:
Use USB. The design trusts the 5V to be regulated, and does not regulate it in any way.
Use a regulated power source, trusted ...
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Power supply voltage confusion
I just ran into this article: Arduino: What adapter?.
It says that the external power supply should be 9-12V. That really surprises me, since my Arduino Uno can also be powered via USB, which is 5V.
...
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Using Arduino to control a 12v car light system?
I am new, but I am wondering what options I may have to control a 12v line that connects to a light with Arduino i/o.
Given the voltage limitations of an arduino, I am thinking using some kind of 5v ...
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Multiple Buttons on Single Analog Pin and Trigger Pin Arduino Uno
I've researched how to attach multiple buttons to a single analog input using a resistor network. Instructables has a good lesson on this: http://www.instructables.com/id/How-to-access-5-buttons-...
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Internal volts in arduino for percent battery
I'm working on a small project that is creating me a headache. I know arduimo (ATmega 328P .... etc. ..) has an internal voltage source code millivolts, but I would like to know how the full source ...
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Can I change VCC pin to 3.3V on a 5V Arduino Pro Micro?
I'm using a 5V Arduino Pro Micro (schematic).
For my project, I'm using the VCC pin to output power to an external device. I need VCC to output 3.3V to the external device. Can I open jumper SJ1 to ...
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Why does arduino work on usb power?
The arduino website states that the operating voltage of an arduino is 7-12V.
Why does the arduino work powered on just usb then? As usb only outputs 5V and 500ma.
Is it preferable to say run the ...
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Arduino amplifier
I want to drive my model trains (märklin) with my arduino UNO, it requires 32 watt (0-12/24v, 2A MAX(changes))
This is Direct current
How can I amplify the output of the arduino to get my 32 watt?
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Operating / pin voltages ATTiny chips
I would like to set up a project with an ATtiny chip, such as the ATtiny84 or ATtiny85, in which I interface the microcontroller directly with an XBee for both wireless serial communication, as well ...
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Does the square-wave nature of PWM dictate how much resistance you need?
I think the answer is yes, but I wanted to ask the question anyway for future common reference. And to check my understanding.
Say I want to power 10 LEDs with PWM with my Mega 2560. I have a bunch ...
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digital pin's current limit, ohm's law and DC motor
A digital pin's output voltage on an UNO board is 5V, which is equal to the output from the VCC. I read that the DC current limits of those pins are 40mA and 200mA respectively, and that a higher ...
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Can I turn off a device using the 5V and analog pins?
Could I connect a device that requires minimum 5V 1A from the 5V Pin to the Ground and somehow turn it off inside a sketch?
edit: I'm using a Due based boad, the digix http://digistump.com/wiki/...
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Using 3.3V XBee with Arduino Pro Mini 5V Version
The Xbee requires a 3.3V power input and the Arduino Pro Mini (5V version) only provides a regulated 5V.
Question: What will be the simplest way to provide a 3.3V rail to the XBee from the Arduino ...
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Adding devices makes I2C read 0
I'm using an Arduino Due with a logic level converter to interface with two different 5v sensors via I2C. Being of poor quality, these sensors have no data sheet.
When either one of these sensors is ...
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Level detection of 3.3V from 5V arduino
A quick question about microcontroller digital level on I/O pins. I have a photo interrupter which is powered at 3.3V which is interfaced to Arduino UNO running at 5V.
For microcontroller to detect ...
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What is the maximum power consumption of the Arduino Nano 3.0?
What is the maximum power consumption (in mW) of the Arduino Nano 3.0, when it is running in its default state (at 16MHz, no LEDs removed) and powered by an external regulated 5V supply so it bypasses ...
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Reading a varying voltage into Arduino
Using an Arduino Nano and a current transformer (CT), I'm trying to sense the current flowing through a 120 V 60 Hz line.
Circuit
CT outputs 0-1 V according to its specifications....
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Arduino USB Power vs External Power Supply
Why is the Arduino able to accept ~5V from the USB, but requires a min of 7V when using an external power supply?
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Arduino Pro Mini (3.3V version) input voltage range / tolerance
I have a few Arduino Pro Mini clones (cheap Chinese stuff) and would like to power them with 12V power supply (same as fan voltage). According to the Arduino Pro Mini spec the RAW pin can take 3.35-...
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How to use a Pololu 5v AVR ISP Programmer to program an AVR at 3.3v
I have a Pololu 5v AVR ISP which I have successfully used to program several Arduinos (a Mega, an Uno and a Pro Mini 5v). I now have a new Arduino compatible clone which is basically a clone of the ...
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How to switch an external circuit with Arduino?
I have an object with a series of led and I want to turn on and off these leds from my Arduino. The input of the LED circuit is 24v DC 100mA.
What I've done is the following:
I've cut a wire of this ...
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How can a 5v Uno talk to a 3.3v Due?
I currently have an Uno (which operates at 5v), and I'm looking at buying a Due (which only operates at 3.3v). I'd like to make them communicate via Serial or SPI or similar, but presumably connecting ...
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How can higher current devices (motors, solenoids, lights, etc.) be controlled by an Arduino?
I'm looking for a broadly applicable solution, one that can be adapted to a variety of projects.
I'm currently working on several projects that each require controlling devices ranging from 800mA to ...
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