Tagged Questions

1
vote
1answer
80 views

Transmitting power and PWM signal through the same cable

I am working on an Arduino based project, which required to supply 24VDC at 2A and 3 PWM outputs from the main board to the other board. The 24VDC is for powering the LEDs, and PWMs are for dimming ...
5
votes
4answers
268 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 ...
10
votes
3answers
41 views

How much current can I draw from the Arduino's pins?

What's the maximum amount of current which I can draw from each of the Arduino's pins without tripping any of the internal fuses? Is there a limit per pin as well as an overall limit for the whole ...
0
votes
1answer
41 views

What is the analog pin for on a Phidget 3051 Dual relay board?

I recently purchased a Phidget 3051_1 Dual Relay board with the intention of using it to switch on and off flourescent lamp ballasts (20W tubes) over a fish tank by connecting the relays to 110VAC and ...
3
votes
2answers
176 views

Measuring an Arduino's power source voltage using Analog In

I am powering an Arduino using a 5v battery, and I need to measure the voltage. Let's say the battery delivers high current, is it safe to measure the voltage via Analog In? As in this: The reason ...
1
vote
1answer
123 views

Arduino Nano: This schematic would work?

If I used this 9v battery, and a 6v battery pack(AA battery), would this combination work. I want to it run disconnected from the PC. Sorry my bad english.
3
votes
2answers
103 views

Doubts related to the Arduino Ethernet with PoE

I implemeted a system by using the Arduino Uno and the Ethernet Shield without PoE. Now, I am thinking to use the Ethernet with PoE but I have following doubts, even if I read the Official ...
0
votes
1answer
73 views

Power analysis of a simple circuit and battery lifetimes

I only do electronics stuff as a hobby so forgive my simple question. I have a simple IR LED/photodiode detector circuit hooked up to an arduino microcontroller. It's not important but the purpose is ...
3
votes
2answers
128 views

Is it OK to have data lines and AC in the same multicore cable?

I need to provide the following over sections of 1m multicore cable, totaling around 15m. 240v AC 5v DC GND RX TX Will the AC cause problems for the Serial data?
0
votes
3answers
167 views

How to control 0 to 110 of AC with microntroller rms output of 0 to 5 v

Is it possible to control high current with small rms voltage? UPDATE Do you think that this is gonna work?
3
votes
2answers
157 views

Maximum power for Arduino Monster Moto Shield

I'm reading the specs for the SparkFun Monster Moto shield which specifies that Max Voltage is 16V Maximum Current 30A Given Ohm's law, does that mean that the maximum power is 480 watts? That ...
3
votes
3answers
147 views

Is Automobile Power Viable for Electronics Projects?

I have some project ideas that would be targetted for use in a vehicle. I would like to consider the possibility of tapping into the car's 12V battery to power the projects, for example through the ...
0
votes
0answers
71 views

Reccomended power supply for Arduino [closed]

I am building a Arduino-based MIDI controller. The components used are 5 4051 multiplexer chips to read 31 potentiometer, 6 4021 shift registers for 48 button inputs, 4 74HC595 shift registers for ...
3
votes
2answers
290 views

Monitor DC Power Usage

Iam doing a DC only backup system with ATMega328 MCU. It supplies full time DC to vaious devices. How can I measure the current usage of each device. The power loss for measurement is thought to be ...
3
votes
1answer
303 views

How to stop a switched current affecting an IC?

I have 10 circuits each consisting of a Touch IC (Atmel at42qt1010) and electrode, and 2 x 350mA Constant current regulators (NSI50350AST3G) and LED's. All connected to a Arduino Mega, by ~1 meter ...
1
vote
2answers
489 views

Sending audio signals to output device through relay

I've created a paper speaker through this tutorial, except instead of conductive thread I used copper tape for the coil. When I hook it up to a device that is known to give off lots of sound, the ...
0
votes
1answer
135 views

BBQ iginter power surge

I am building a home beer brewing rig that has several electrically actuated components controlled by an Arduino. The typical scheme is Arduino -> Shift Register -> Relay -> Component. One of the ...
1
vote
2answers
1k views

What type of DC-DC converter should I use for solar MPPT?

I am currently doing a project that involves Maximum Power Point Tracking (MPPT) for Solar Panels. I plan to do this by using the Arduino as a controller to a DC-DC converter. I am going to use the ...
1
vote
1answer
159 views

Connecting arduino to power another device

I have an arduino board which I want to use to give power to a device which uses two 1.5V batteries. I think I have to remove the batteries from the device and control the power supply via arduino, ...
-3
votes
1answer
122 views

What type of arduino board do I need?

I need some help with choosing an Arduino board or maybe something else for the task that I need to do. I want to have a board that will get a input (power signal) to the board and that will send a ...
2
votes
2answers
227 views

Keeping power to arduino after mains shutdown

I have had ideas for an arduino-controlled led-lamp for a while now. It's mostly fancypants stuff, but could be fun. The lamp is made up of several individually controllable leds. And on power-on I ...
5
votes
3answers
553 views

How do I calculate how much solar power I need for a system?

I'm prototyping an autonomous remote system which is composed of the following components: Arduino Leonardo Solar Charger Shield V2 3W Solar Panel Lithium Ion polymer Battery pack - 6A The system ...
4
votes
1answer
301 views

Low power sensor module

My next project requires me to have energy-efficient wireless sensor modules. Basically, these modules read sensor data and transmits it over a wireless transceiver. Currently, my setup includes an ...
10
votes
3answers
2k views

Arduino in car: capacitor for extra 3 sec of power

I want to install an Arduino Uno in a car, powered by a consumer 12V->5V car voltage regulator plugged into the lighter socket. The socket is switched, i.e, there's no power when the motor's off. When ...
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, ...
2
votes
2answers
854 views

Arduino controlling separate traffic light

I have an arduino that can turn on 3 LED's separately. I also have this traffic light (12v with 3 plain-old lightbulbs) that, when plugged into an outlet, turns on all of the lights. What could I ...
0
votes
2answers
748 views

Using Vin pin on Arduino with a shield

I just bought a wifi module shield and using it with Arduino. I power Arduino (with the wifi shield on it) via USB from the PC. I need to demonstrate it without using the PC as a power supply. And I ...
2
votes
1answer
1k views

Arduino triggering a TRIAC for EL Wire, no optoisolator

I have been researching and looking up how to control EL wire online and I will be using the same layout as the EL Escudo shield from Sparkfun but just for one strand. Basically: Arduino (+ resistor) ...
4
votes
1answer
1k views

Measuring real and apparent power

I hope my question is in accordance with the rules of the site. I'm doing a power meter using a voltage transformer, a current transformer and an arduino, besides the components to create the ...
0
votes
3answers
470 views

Issues with resistor heating, for an LED?

I am direly confused on this. I've used 220 Ohm resistors in the past for all of my LEDs (at least that I can remember), however nothing on my arduino+breadboard with a few leds on the 5V breadboard ...
2
votes
2answers
351 views

Power efficiency on PIC/AVR

I usually make Arduino protos without worrying about power- there will always be power so why worry. Recently I was asked to make simple device that counts clicks/ticks( a knob turning that makes a ...
0
votes
1answer
324 views

Arduino Power On notebook PC

Is it possible to "Power On" notebook PC with Arduino (or with USB keyboard) without pressing notebooks power button ? Notebook PC is Acer 5720Z.
0
votes
4answers
2k views

Multiple buttons on 1 analog VS one digital per button:Power Consumption

im working on a bluetooth watch project. You may have already seen it on hackaday http://hackaday.com/2011/08/23/bluetooth-wristwatch-based-on-an-arduino/ i kinda need to add some buttons onto the ...
2
votes
2answers
456 views

Powering LEDs with a computer's power supply

I have 10 of these boards OctoBright CYANEA v2.0 connected in series, controlled by an Arduino. Powering one or two off of the Arduino 5v pin has worked for testing. Now I want to scale it up to 10x ...
2
votes
1answer
1k views

Connect Arduino to ESC with BEC (without using its power)

I am using the Arduino Servo library to control two servo's on a RC-car. One of the servo's (for steering) is without ESC (as it should be), so easy to connect and power. However, the motor that ...
2
votes
1answer
430 views

Safely connecting an solenoid/electromagnet to a switch-mode supply

I'm currently working on a project that involves hooking up an arduino, a cellular shield, and an electromagnet (in this case, one of those old fashioned ringer boxes with a bell powered by ...
4
votes
3answers
574 views

Safe Powering Methods - Working with Children

I'm carrying out a research project this year at uni, which will include creating small electronic sensory devices for children (under 7) with autism. Obviously, safety has to be taken very seriously. ...
5
votes
1answer
1k views

Arduino Duemilanove external power source with USB connected

Can Duemilanove USB interface be used for data transfer/programming when the board itself is connected to an external power source? (say, USB is not powerful enough) What are the requirements for the ...
4
votes
2answers
793 views

Arduino how to get more Power

I have an arduino project that is almost finished. Now it controls a series of ShiftBrites(ShiftBrties being 10bit RGB LED's) now they use a simple 4 wire configuration(Data, Logic, Clock, Enable) ...
4
votes
2answers
2k views

Connecting arduino and separate power supply grounds

I am working on an arduino project that uses transistor switches to power on high power leds that are powered by a separate 24 volt power supply. My issue is that I have two different grounds, making ...
4
votes
2answers
4k views

Power line communication principles

What are the principles of implementing Ethernet over power lines ? Is it reasonable/possible to create an Arduino shield which will provide both power & network ? (properly isolate the "dangerous ...
4
votes
1answer
320 views

ArduinoBT UART Communications

Is there any way to monitor what is being sent to the WT-11 module via UART? I'm trying to implement deep sleep on the WT-11 and can run the iWRAP "TEST DEEPSLEEP" command successfully but the deep ...
4
votes
3answers
723 views

Correct DC Adapter type to use for Arduino

What's the correct DC Adapter to use with Arduino? Voltage etc?