Tagged Questions
1
vote
1answer
52 views
Wiring a switch to toggle both usb power and external power on Arduino
I have a 5v Arduino Pro Micro. I am using it to run a series of motors. I am controlling it through the USB port. The USB power doesn't supply enough current to power the motors, so I am using a 9v ...
1
vote
1answer
72 views
Arduino motor shield running 2 12V 60 RPM DC motor
I'm trying to run a bot with a differential drive system and I'm using 2 12V 60RPM DC Motor and an Arduino shield along with the Arduino, along with that I'm also having an wheel position encoder ...
7
votes
2answers
380 views
How can I spin an old HDD motor?
I've stripped out an old IDE (40 Pin) HDD from 1998 for use in a POV display project (Gr. 12 Computer Engineering), and I've been trying to spin it up.
The problem is that the HDD motor is brushless ...
0
votes
4answers
159 views
3.7V Lithium ion battery supply and Arduino Uno
So many people have asked questions related to mine already, but mine is not quite out there. So my question is I have a 3.7V Lithium Ion battery and I need to power Arduino Uno, which requires a ...
5
votes
4answers
250 views
Arduino Uno R3: Directly supply regulated 5V to 5V pin?
I'd like to use an Arduino Uno R3 battery powered a datalogger. I want do supply it directly with a Step-Up regulated 5V rechargable battery powersource at power ...
2
votes
1answer
62 views
What type of potentiometer to use for 240v AC power application?
I'm working on my first Raspberry Pi project which is to change the brightness of standard household light bulbs.
I have my Raspberry Pi and relay switches which together let me control when the ...
5
votes
1answer
43 views
How should I power my permanentified project?
I have transferred my project from an Arduino to a microcontroller. I want to make it into a permanent installation; for that I need to power it.
If I want to power it via a wallwart, what ...
7
votes
2answers
19 views
Does the Arduino Uno “Clean” the power input from the adapter?
I am building a temporary Arduino project, and I need to order an adapter online. I am concerned that, if my adapter has lots of noise, it will affect the Arduino. Since this is temporary, I am going ...
4
votes
3answers
253 views
Car Battery + Car battery Charger = 12 V Bench Power Supply?
So a bench power supply can be quite expensive, and something I already have laying around is a car battery and a car battery charger. Is there any reason why a car battery + battery charger would ...
4
votes
1answer
123 views
Voltage regulation on the high side of a Darlington array?
I'm looking to build an 3.3V Arduino Pro Mini based LED driver that drives 3 (possibly 6) super bright 10mm LEDs (R, G and B).
I intend to use this 3.7V LiPo battery and these LEDs.
The LEDs have the ...
1
vote
1answer
389 views
How to drive high power LED and Arduino by the same power source?
I am building a plant light consisted of 24 high power LEDs (Cree ML-E) and an Arduino Uno. I would like to power the LEDs and the Arduino by the same power source. Since creating circuits for dealing ...
4
votes
3answers
282 views
How can I power 10 12V motors?
I am building an experiment that consists of ten either stepper or DC motors. Ideally I want to just have a switch box with one switch per motor so I can just flip the switch for motor 1 and it will ...
0
votes
1answer
223 views
What kind of power supply can power this stepper motor connected to an Arduino?
Stepper Bipolar circut: http://arduino.cc/en/Reference/StepperBipolarCircuit
I have this bipolar stepper motor "Stepper motor - 200 steps/rev, 12V 350mA - " which i am connecting to an Arduino. The ...
1
vote
7answers
215 views
What thickness of wire should be used to power Arduino on 9 meters?
I have built a standalone Arduino device which has a few buttons, LED's and one servo. I also have a power source which on the casing says 4.9VDC ~ 700mA. (Actual reading is 5.7V). This power source ...
0
votes
2answers
242 views
how do I supply 3.3V from my 5V arduino pro mini?
I have a 5V Arduino Pro Mini that I want to connect with this 3.3V nRF24L01+ module. (On the other end I have the same nRF24L01+ module connected to an Arduino Uno which has a 3.3V pin that I know is ...
0
votes
1answer
473 views
How to use a SN75441 h-bridge in conjunction with an arduino
I am trying to use a SN75441 h-bridge in conjunction with an arduino in order to drive a DC motor forward and backward. Let me describe the setup and then the problem I am encountering.
I have an ...
7
votes
2answers
259 views
How to buffer an ATMEGA for millisecond-level power interruption without strange behavior?
I have an ATMEGA328p-pu arduino with an LED + shift-register strip circuit attached over SPI. When it turns on, it increases a variable in EEPROM to advance the display mode.
We have the brownout ...
2
votes
1answer
220 views
How best to power more than one Arduino board as part of a single project
I'm working on some little projects that'll involve more than one Arduino (right now two of them, an Uno R2 and a Mega R3) along with some other 5V items that may themselves draw a few amps.
Rather ...
0
votes
1answer
255 views
Li-Po shield for Arduino with in-line recharging, soft-off and voltage protection?
I'm looking for a shield for my Arduino (or a breakout board that I can adapt for the purpose). It should have these abilities:
JST connector for my single-cell battery.
Over- and Under-current ...
4
votes
1answer
314 views
Arduino and Backup Battery Power
I have a very simple project that is working off of an external "wall wart" power supply and I would like to add a back up battery in case of power failure. I have breadboarded a backup power supply ...
2
votes
1answer
2k views
Connecting multiple ultrasonic sensors to one Arduino
I'm trying to connect five ultrasonic sensors (HC-SR04, to be exact) to an Arduino board to detect obstacles in five directions (four cardinal + one Z-axis). I read the datasheet on the HC-SR04s and ...
0
votes
0answers
34 views
Can I use a 12V / 2A power supply with a 12V / 1.3A motor? [duplicate]
Possible Duplicate:
Choosing power supply, how to get the voltage and current ratings?
I just ordered this motor, and the description says it was tested with a 12V / 1.3A power supply.
Now ...
0
votes
1answer
937 views
Do I power a stepper motor with 24V and Arduino?
I am building a motorized barn door tracker using an Arduino UNO and a stepper motor I took from an old scanner (Mitsumi M35SP-7T). I have been unable to find the datasheet for this motor ...
1
vote
1answer
345 views
communication between 2 arduino crash when external power supply is plugged
i have one arduino mega that communicates with one arduino leonardo.
the leonardo controls some motors (mega tell to the leonardo how many step to do... leonardo is a coprocessor for the motor in ...
2
votes
1answer
2k views
How to connect together: Raspberry, Arduino, PC PSU, Usb Hub, Usb Hdd - without issues?
A pc psu provides power for:
arduino uno (via de standby 5v power + ground so it always has power)
raspberry pi (via a 5v + ground connection)
usb hub (via a second 5v + ground connection)
...
0
votes
1answer
516 views
How to power an arduino controlled string of RGB LED's from separate power source
I'm new to electronics and working on a hobby project that will have an arduino board running 5 separate strings of RGB LED's. I'll be using a PWM chip (TLC 5940) so I can independently control tho ...
5
votes
1answer
287 views
Safety of powering 5V circuit of 240V main outlet using adapter
I have created a circuit using an ATTiny that will need constant power. I was thinking of using one of the 240V to 5V USB adapters that come with many phones to power this circuit.
Will I need to put ...
5
votes
2answers
847 views
Arduino power sharing
I just wonder if there is a way to share my 5v pin between two or more components?
I am practicing my Arduino skills and I have a button which when pushed I want to activate my ultrasonic sensor - ...
1
vote
1answer
220 views
Backup battery tester circuit
I am attempting to read the voltage on a backup battery on an Arduino. To that end, I used the circuit Olin Lathrop offered in answer to this question. I am powering the Arduino with 5V, and the ...
2
votes
1answer
108 views
Accellerometer and arduino lillypad and wearable projects
I have just bought an Arduino Lillypad and an MMA8452 accellerometer board and i have few questions:
1) Power supply on lillypad
I know that working with accellerometers is a little bit dangerous: ...
4
votes
1answer
2k views
How do I step down voltage and current in a DC application?
Background
I am currently building a RC multicopter that utilizes an 11.1 V 20 C 2200 mAH LiPo battery as it's main power supply. This is fine to run the ESC's and motors; however, I also need a 5 ...
0
votes
1answer
509 views
Using a breadboard power supply along with USB to Serial chip
This is a very niche question but I'm wondering if there is a general princinal that can be applied to help answer it.
Here is my prediciment. I am making an Arduino on a breadboard. For the power ...
1
vote
2answers
1k views
Using Multiple Power Supplies with RGB Leds and Arduino
I'm trying to control 3x 5m RGB LED strips using an Arduino Mega's PWM pins. Building off ladyada's tutorial: http://www.ladyada.net/products/rgbledstrip/. I created a 3x3 bank of N-channel mosfets, ...
9
votes
6answers
2k views
My MOSFET operated solenoid circuit destroys my Arduino inputs
I made a series of PCBs to power some solenoid valves that use an external power supply. I switch them with BS170 MOSFETs using an Arduino as gate signal.
I based it a solution by Jason S.
This is an ...
5
votes
2answers
2k views
Arduino backup power supply
As a complete beginner in the field of electrical engineering, I am trying to build an alarm system on an Arduino board. I want to power my board using an external 10V power supply. In case of power ...
1
vote
4answers
3k views
How can a Arduino (5v) power a device that operates on >12v?
Say I buy a device that requires 25 volts to function, but I want to control it using my 5v arduino. How would I go about powering/controlling higher voltage devices?
1
vote
1answer
242 views
Arduino power supply issue
I've been playing with the ATmega328 and xbee a lot and wanted to take it to the next step and make it fully mobile. So i have decided to use 2xAA batteries along with a 5V step up to get a stable 5V ...
6
votes
2answers
1k views
How Arduino Power supply works
Can someone please help me in the analysis of this arduino board power supply works
To my understanding,
1. In the presence of DC power through the DC jac, Dc voltage is fed to the MC33269 ...
3
votes
2answers
12k views
How to use external power supply for Arduino Uno?
Can I use an AC power adapter that can be connected through USB port? My board is Arduino Uno and usually connect to my computer through the USB cable.
AC power adapter <-> USB port <-(USB ...
2
votes
4answers
855 views
Need help with use of LM358, microcontroller and +/- power supply
I have signal in 0-5V range and would like to amplify it to 0-10V. For that I am using LM358, but I have a bit of trouble with that.
I have naively designed the circuit like so:
I tried to supply ...
2
votes
2answers
711 views
Arduino and LEDs Power Supply Question
First, thank you to anyone taking time out of their day to read this and answer. Resources like this are incredible for amateurs like myself.
My question is based around power supplies, Arduinos ...
0
votes
0answers
190 views
from arduino to production [duplicate]
Possible Duplicate:
How to go from newbie to manufactured?
I've used the arduino board to design a small circuit with a couple of LEDs and some distance sensors.
Now I would like to know ...
0
votes
2answers
322 views
What kind of power supply should I be using to power the incandescent bulb inside the Big Dome Push Button?
I have a Big Dome Push Button as the activation switch for a photo booth project I'm working on. The problem is, I don't know how to power the incandescent bulb inside of it. I don't want to do ...
1
vote
1answer
393 views
Arduino getting supply from digital pin?
I'm having a weird problem: my Arduino seems (in my far-from-expert interpretation) to be getting supply voltage from a digital pin.
This is my setup:
Arduino is using external supply voltage. I've ...
1
vote
3answers
1k views
Sensor reading is chaotic when Arduino is powered by laptop unplugged
I have a Sharp proximity sensor connected to my Arduino (analog input). This Arduino is connected and powered through USB by a laptop.
When the laptop is plugged in, everything works fine (I get
...
1
vote
3answers
332 views
power source affecting my IR receiver
I have an arduino with a simple 3-pin IR receiver like you would find at radio shack. The receiver works fine when the power supply to the arduino is 6 AA batteries, but not when the power supply is a ...
4
votes
1answer
368 views
Is it ok to power an Arduino with 15 V?
The documentation says 12V is the max tension recommended, however the "limit" is 20V (see: http://www.arduino.cc/en/Main/ArduinoBoardDuemilanove).
Will the Arduino be OK if I power it with a 15V ...
3
votes
1answer
674 views
Arduino + Ardumoto : External power source
I have an Arduino and an ArduMoto. I want to use that to power 8V motors with a 17V battery (using PWM).
It says for the Ardumoto that the VIN used to power the motors is the VIN of the Arduino ...
3
votes
2answers
895 views
Arduino board Power Polarity
I don't know if the power plug should have + at the inner contact or the outer.
18
votes
4answers
2k views
When a battery is your power source, what is ground?
For the sake of not incorrectly connecting my power supply and damaging my board I'm going to ask a relatively dumb question. Is ground on my board the negative terminal on my battery? Explicitly ...
