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3
votes
6answers
2k views

AVR Assembly on Arduino through USB?

Say I wanted to learn AVR ASM, and I had an arduino. Now i know you can program assembly on the arduino, but is there a way to do it through USB. I assume i'd just write normal assembly and do it ...
0
votes
1answer
46 views

Should I use a snubber or solid state relays on a 24 vac circuit?

I'm trying to create a smarter controller for my hydroponic systems. I have an arduino controlling a sainsmart mechanical relay. The load on the relays are 24 VAC orbit sprinkler valves. Everything is ...
0
votes
1answer
81 views

Jack type for a 12v DC motor

I have an Arduino with a motor shield and I use it to power 4 different DC motors. Motors are connected to the shield through a screw terminal. Since I am in the prototyping step, I am moving them ...
0
votes
1answer
47 views

How do I detect servo stall with an Arduino?

I am controlling a standard 5-volt servo with an Arduino with PWM. My objective is to rotate the servo until it physically gets stalled (feels resistance) and then stop. Then I want the Arduino to ...
0
votes
0answers
22 views

How to wire four half-brige 3-wire strain gauge load cell to an amplifier?

First of all, i am given a task to make a digital weight machine. For this i have chosen 4 strain gauge (3-wire load cell) which you can find here. I have searched all of the links i found on the ...
2
votes
1answer
41 views

LED's connected to a relay remain on?

I built a simple project with an Arduino board. I use the board to read analog input values from a rotation sensor (potentiometer), and use the values to determine which SSR relay on a module to turn ...
0
votes
0answers
4 views

What should the frequency reading of the SPI clock be with this code? [migrated]

My Extech EX330 multimeter is reading 3.439Mhz on the pin 13 on my Arduino Uno running the following code. Is the reading correct? If the divider is 2, shouldn't I get 8 Mhz (16Mhz / 2)? ...
0
votes
6answers
497 views

Best choice for low-power, short-range wireless communication

I'm working on a project which relies on wireless communication, and I'm looking for the best alternative. These are the design requirements: Is easy to interface with Arduino Works over a small ...
5
votes
4answers
509 views

Wireless Home Automation 2.4GHz versus 433MHz [on hold]

Project specifications To make some things clear first(wow that sounds so arrogant): This is an Arduino project This is supposed to be internationally applicable I have experience with 433 MHz ...
0
votes
0answers
26 views

activate servos 90 degrees with on off [on hold]

I built a box that has an arduino with wave shield that sends power to a pneumatic device and turn targets for a set time after preliminary commands. Different buttons give the choice of 10 or 20 ...
0
votes
1answer
62 views

Unable to Power Arduino and DC Motors via 2 AAA Batteries

I am using 3.7 V 2000mah battery. I am stepping it up to power an arduino board via an NCP1402. It has a continuous output current of 200mA. I am trying to run two Micro Metal Gear motors with stall ...
0
votes
1answer
56 views

Switching frequency of a solid state relay?

I bought a SainSmart 4 channel solid state relay recently. I am planning to use an Arduino to control some Christmas lights I've put up around my home. My question is: How fast can you switch SSR's on ...
0
votes
3answers
145 views

Embedded system for image processing project

Is it possible to do image processing (to extract numbers and text) using a microcontroller? If not, what are the alternatives to do this task?
1
vote
4answers
118 views

Sensing analog voltage on Arduino without loading the input circuit

I want to design a voltage divider for my Arduino Analog input pin, to be able to sense the change in voltage in a 9V, 250mA circuit (without loading it). Ive programmed the Arduino so that as soon ...
0
votes
3answers
4k views

Programming an ATMega328 with Arduino bootloader via a FTDI USB-serial adapter

I would like your advice relating to using the Arduino IDE and avrdude to program an ATmega328 which is preloaded with an Arduino bootloader. I am using a USB to TTL-serial breakout board based on an ...
-1
votes
0answers
30 views

Android Arduino USB [migrated]

I have a HCL ME U1 tablet. This has a built in USB Type A socket as well as USB Mini Type B socket. I have tested the Type A socket with a standard mouse and it works well. I have also tested it ...
11
votes
5answers
8k views

Scaling Voltage for Arduino Analog In, Beyond Voltage Dividers

I've recently built some fiber-optic bend sensors and I want to read the values I get from them into a computer via an Arduino. I'm measuring the light with this photodiode from Industrial Fiber ...
9
votes
3answers
3k views

CD-ROMs open/close in response to sensors

The general question: How can I open and close CD-Rom drives (about 20-30) in reaction to various sensor input? Some more specific questions (based on the assumption that I should to tackle this ...
-2
votes
1answer
25 views

Ardunio camera module OV5642 without sheild [on hold]

Can i program OV5642 camera module attached to arduino mega without any camera sheild.Does any have the code to capture an image using it? Kindly post the code.
0
votes
0answers
6 views

Creating arduino library linking question [migrated]

I know how to create my own arduino library and use it. I am using Xcode to create a c++ project. I have the arduino library files(Servo, Wire, Keypad, etc). If I want to include the Servo.h library ...
0
votes
3answers
141 views

Why use a resistor for Pull-Up? [duplicate]

I just got my first Arduino and had a question about pull-up resistors. I was trying to connect a push-button to the Arduino at pin 2, and if it's HIGH then I write HIGH to pin 13. Now, in the ...
0
votes
2answers
47 views

Using ethernet with a camera

I own one of those little pinhole 'spy cameras' that connect to your tv.and are powered by 5v? With an arduino and ethernet shield, would there be a way for me to create an IP camera type thing?
0
votes
1answer
57 views

What are these unpopulated holes on the Arduino Leonardo?

None of the pinouts online mention these holes next to the power barrel and LEDs. Are they connected to anything?
1
vote
3answers
9k views

Control the lights both with wall switch and arduino

I am starting to build new house and want to add some home automation features, for now, turning lights and sockets on and off. i bought arduino mega, ethernet shield, current sensors to see if the ...
2
votes
6answers
2k views

How do you develop software for the Arduino?

Is the main way of programming the Arduino's Atmel MCU thru a Visual Programming environment such as Max/MSP? Or do you have to write typical C code? What are the different ways available?
4
votes
1answer
1k views

Logging measurements from an analog Gas Meter

I want to capture a gasmeter counter to log the gas consumption in my database. Problem: till now I did not find a way to read the meter. I tried a sensitive hall sensor that could react on the ...
4
votes
6answers
6k views

How do I control several hundred individual leds with Arduino(s)?

I am working on an electronics project which involves hundreds of LEDs. (Talking upwards of six to seven hundred LEDs...a lot, I know.) Is there any way to control this many LEDs with one or a couple ...
1
vote
1answer
3k views

The appropriate code (Arduino) of Xbee

Can you tell me what is the appropriate code to send two variables (x,y) from an Xbee to another Xbee (series 1). I configured them and I can't write a code (because I don't know how to receive ...
1
vote
1answer
36 views

How to detect several agents within a radius, what is the best and easiest way to do it?

I have a room with 30 objects which may or not be present, and I want to be able to detect which objects are in the room. My first idea was to attach a RFID tag to each one of these objects and have ...
0
votes
0answers
17 views

Passing sensor data from Arduino Uno R3 to android with USB Serial

I would like to know how would it look like to receive data on Android from DHT11 sensor which is connected to Arduino Uno R3 via USB Serial? I was trying some code examples for Arduino but i got a ...
0
votes
4answers
245 views

Sending signals to PC over wifi

I need a microcontroller that would send statuses of it's input pins (around 5 of them, they can be 0 or 1) to a PC over wifi. I thought of using arduino, but I don't know what would I need to make ...
27
votes
4answers
4k views

I2C 3.3 to 5.0 V conversion

I'm trying to interface a 3.3V I2C device to a 5V Arduino. I don't have any problem with SCL line. I can use a simple voltage divider but I have an issue with the SDA line as this is bi-directional. ...
1
vote
1answer
597 views

MOC3010 & BT136 with Arduino as trigger to power AC light

I've spend days debugging this circuit and have exhausted all possible solutions. I'm trying to use an Arduino PWM pin to light a 120V AC lightbulb. In order to do this I'm using a MOC3010 ...
1
vote
1answer
54 views

small scale positioning system

I have previously entered a competition called "robocup juinor australia" for a few year now with increasingly good performance each year, this year we have been sponsored for over 15k which is a big ...
0
votes
0answers
17 views

Problem with connecting Arduino nrf8002 to PC using FTDI board

According to a tutorial ( http://www.jayconsystems.com/tutorial/nrf8002_ble/ ) I'm trying to connect nrf8002 device to my PC to setup the settings using nrf Studio software. So first I connected the ...
1
vote
1answer
48 views

Detecting device/bulb/socket state without using ACS217

I am planning to do home automation using Arduino. It includes a manual switch and can be also controlled by Arduino. My problem is I want know the status of the bulb/device or socket. Recently I ...
0
votes
1answer
38 views

What are some of the reliable color sensor circuit? [closed]

We want to detect four different colors: Red Blue Green Yellow There are many different color sensor circuits using photodiode and LDR available in the internet. What are some of the reliable ...
0
votes
0answers
7 views

Get the uploaded code from arduino by using arduino IDE 1.0.6 [migrated]

Recently bought a arduino device which already have program, it is model AR-293D and I have already connect it with my PC(windows 7) through usb when I open the IDE , It seems there is no function ...
3
votes
1answer
73 views

Noisy ADC readings

So I am struggling with a problem, i am sure someone would have faced. I have a RAMPS shield with a arduino Mega working as the brain of my printer Temperature readings from the heater thermocouple ...
0
votes
1answer
111 views

Start a teensy sketch after USB handshake has completed or upon a button has been pressed

I have an issue in starting a sketch on my Teensy at the right time. I work in a school as an IT technician and over the summer I go through all the computers on site, log-on and check if they're ...
3
votes
1answer
176 views

Floating supply and USB ground

I have a somewhat complex circuit controlled by an Arduino, which is supplied by a self powered USB hub (earth grounded 5V supply). A part of the circuit has to be powered by 12-20V DC. When I plug ...
3
votes
4answers
1k views

Are these two Arduino Pro Micros jumpered correctly?

I picked up a couple of cheap Pro Micro's off eBay a while back. Both are blue, and have no brand identifier on them (ie, Adafruit, Sparkfun, etc.). The ebay ad. directly copies the text from ...
1
vote
1answer
27 views

Bluetooth audio stream to commercial headset

I would to connect my simple audio player (Arduino + https://www.sparkfun.com/products/11125 ) to a Bluetooth headset you can buy at the market. How can I do ? Is it possible ?
0
votes
0answers
979 views

Arduino Yun not starting after connecting DC Power (from time to time)

My circuit Consists of: Arduino Yun: http://arduino.cc/en/Main/ArduinoBoardYun?from=Main.ArduinoYUN Arduino Motor Shield rev3 : http://arduino.cc/en/Main/ArduinoMotorShieldR3 12V Lead-Acid Battery ...
0
votes
1answer
98 views

Use Arduino to Plot the balance of my airplane propeller using optical sensor and reflective tape

I would like to use an arduino to determine how out of balance my airplane propeller is. I've seen a production device that uses an optical sensor and reflective tape to plot this. Can this be done ...
0
votes
0answers
7 views

Controlling LED delays via keypad [migrated]

I'm trying to turn on LEDs based on delays entered by keypad and the same for turning them off, but the LEDs are not responding. Here is the code I'm using: ...
0
votes
1answer
59 views

Understanding capacitor usage in the Sparkfun arduino [duplicate]

In the schematic for the Sparkfun Arduino mini pro 3.3v https://cdn.sparkfun.com/datasheets/Dev/Arduino/Boards/Arduino-Pro-Mini-v14.pdf there's a 0.1uF capacitor (C3) just left of the atmega ground ...
0
votes
0answers
20 views

HC 05 piconet 1 master 2 slaves

I was wondering if it is possible to connect 3 HC05 Bluetooth modules. I would like to have one as master sending messages to all (2 as a start) slave modules (the slaves are connected to arduino to ...
0
votes
1answer
57 views

How to connect a four route MOSFET to multiple power sources? [closed]

I have this four channel MOSFET switch: I have connected one RGB LED-strip to this, and controlling it from an Arduino, and this works great. The problem is that I need to control four of these ...