Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.

learn more… | top users | synonyms (4)

0
votes
0answers
15 views

9 DoF Sensor Accelerometer Readings Inconsistent

I have the following sensor stick: https://www.sparkfun.com/products/10724 It has an accelerometer, gyroscope, and magnetometer. I have connected it to an arduino and am reading the accelerometer ...
0
votes
3answers
59 views

How can I emulate two analog joysticks (potentiometers) with an Arduino?

I have a quadcopter (Syma X5C) that I really want to control with an Arduino. Since I have the ability to write programs to my Arduino to make the quadcopter fly autonomously, I want to modify my ...
0
votes
1answer
475 views

No luck trying to make two XBees communicate in API mode with arduino XBee library.

I have been trying to make two XBees communicate for a long time. I have checked everything and at last I come here for some help from the experts or who have already stumbled upon the same problem as ...
1
vote
0answers
37 views

L293D causing motors to move slowly

I'm modifying an RC car to use bluetooth. I use the L293D chip, and when I connect the motor to the chip, the car barely moves. If I connect the 9V battery directly to the motor, it moves the car ...
-1
votes
1answer
32 views

How can I program Mega2560 with Atmel Studio 6.2

I have got the SainSmart Mega2560. The problem is now: how can I program it with Atmel Studio 6.2? I can find no way to upload code, because the controller is not in listed and with ISP I can not do ...
0
votes
3answers
54 views

SPDT Relay with 8Pin

I needed a SPDT relay with 240Vac so I bought this relay from Maplin http://www.maplin.co.uk/p/15a240vac-spdt-miniature-relay-n07aw But I am heaving problem to wire this relay because it has 8 pins ...
-1
votes
0answers
39 views

How can i dim the lamp using triac and arduino [on hold]

I have seen many blogs but I can't find out the correct way and circuit to do so. If you know it then please give me the proper explanation of the circuit, the things used and name the materials ...
1
vote
1answer
6k views

Wiring a GY-521 to an Arduino Uno R3?

I am searching for a non-technical picture or diagram or explicit textual instructions explaining how to wire a GY-521 Accelerometer/Gyro to an Arduino Uno R3. I am a software developer and need ...
1
vote
1answer
766 views

How to connect an Arduino to a STM32F4 evaluation board?

I have a few Arduino and sensors on Arduino shields. I also have a STM32F4 Discovery evaluation board. For a hobby project, I have a feature on an Arduino (Ethernet port on my EtherMega) that I would ...
1
vote
1answer
44 views

MIDI To Polyphonic Square Wave on Arduino

I've been struggling with this for a few days now, and I would really like to get on with my project. Unfortunately this is holding me up. What I am trying to do is retrieve MIDI signals sent over USB ...
3
votes
1answer
40 views

Sharing Clock and Data for 74HC595 and CD4021B Shift Registers?

Can output shift registers (74HC595) and input shift registers (CD4021B) share the same clock and data lines on Arduino using SPI, with different latch pins "activating" either chain for input or ...
0
votes
3answers
56 views

Can I power Ardiuno using buck converter IC 3485 or any other buck circuit?

A buck circuit lowers the voltage by generating pulses at a certain duty cycle. Is it okay to give this pulsing voltage to Arduino? Can Arduino work normally with this? I have 12V battery and I want ...
3
votes
1answer
1k views

How to keep the arduino uno up on serial connections?

Each time I open a Serial connection to my arduino it restarts. Is there a way to unactivate this ? Cheers.
-1
votes
1answer
39 views

How to Control a 3D Printer Extruder [on hold]

I am trying to control a 3D Printer Extruder that I got online. I know that for the most part, a person would just plug this in to a circuit board and it would just work. I want to make my own circuit ...
0
votes
0answers
22 views

RFID smart bookshelf and Arduino [on hold]

We're trying to make smart bookshelf in our office for books tracking. Basically the requirements are: 1) Each person in office must attach RFID card to the RFID reader and only then take the ...
2
votes
3answers
536 views

Can the atmega168 bootloader be installed with arduino uno?

I have an arduino unu (pre-made) with the atmega328 and an atmega168. I am wanting to make a second arduino out of the 168. I don't have a USB programmer. The chip came out of some servo contorller ...
-1
votes
0answers
67 views

SEPIC hardware problem [on hold]

I am doing my project on SEPIC converter. It seems that the switching action between drain to source is happening only at low voltage. At high voltage it does not work. What seems to be the problem? ...
0
votes
0answers
22 views

Sepic hardware 2 [duplicate]

Hi i am attaching more images, i hope you would understand img. 1 is the waveform at 8 V input is applied to the Sepic converter. img 2-4 are various low voltage (below 2V) applied
0
votes
1answer
107 views

How can I power this LED Matrix?

I'm controlling a 16x32 LED matrix with an Arduino and have it wired correctly (I think) but I'm having trouble with the power. I tried to follow the instructions from Adafruit but was unsuccessful in ...
0
votes
1answer
47 views

Sharing the Seeeduino LiPo with a motor controller

I'd like to use a Seeeduino to control a small DC motor to wind/unwind a thin cable which will be lifting a small door. Ideally, I'd like to use the same LiPo that's being used to power the ...
0
votes
1answer
80 views

Low-cost Up-Down Servo solution

I have a small project and I'm interested "upgrading" to a more produce-efficient design. Please note I'm no electrical engineer. I want to move a small servo (like this one ...
0
votes
0answers
57 views

One-shot sound button/trigger for Arduino Sound Player

I've succeeded in making a simple Arduino ATMega328 sound player on my breadboard following this guide. . . http://highlowtech.org/?p=1963 http://playground.arduino.cc/Code/PCMAudio But, here's my ...
0
votes
0answers
7 views

I bought USB > FT232RL, can I use it to program a bootloader onto an Arduino? [migrated]

I bought this thing off of eBay: eBay Link Will it allow me to program an ATmega[xxx] (Arduino clone) with a bootloader? --> If so, how would I go about it? What should I do, and what should I ...
4
votes
1answer
73 views

AVR ATMega I/O pin overcurrent protection

I want protect I/O pin against overcurrent to make circuit more robust. Atmel's AVR040: EMC Design Considerations discusses internal overvoltage protection in General I/O Pin Protection paragraph. But ...
2
votes
1answer
1k views

Arduino, RGB LED, BlinkM MaxM controller

I'm a student from QUT doing interaction design this semester (you've probably heard from a few of us over the past few months). Anyway I just order the 25 diffused RGB Leds if that rings a bell for ...
0
votes
1answer
119 views

Current draw at digital output pin differences in two equally coded segments -probable cause?

I measured the current output of an Arduino Duemilanove (with an ATmega168) in two cases and found out that the currents differ strongly. The following code creates an output of 72mA at pin 13 ...
3
votes
3answers
7k views

Arduino - Stop execution of code definitly

I've got a big problem with my new Arduino. I made a big mistake, and now I can't anymore connect to my arduino. Is there any possibility to recover the Arduino, or to stop the execution of code ...
3
votes
3answers
6k views

Arduino Uno SoftwareSerial and Serial conflict

I have a very simple setup with an Arduino Uno R3 connected to my Windows 7 x64 with Arduino 1.0.1. I have a RF receiver connected to the Arduino on the DI10 port using the SoftwareSerial library. I ...
1
vote
2answers
68 views

How to power my datalogger?

I am building GPS datalogger. It will consist of Arduino Pro Mini 3.3V, GPS module - GY-GPS6MV2 (GPS Ublox NEO-6M) (bypassing 3.3V regulator) or Skylab SKM53 (MT3329). Data will be written to SPI ...
0
votes
0answers
34 views

dB Meter with Arduino and AD8307

I am attempting to construct a decibel meter using an electret mic breakout board (shown below) and an AD8307. If necessary I can use just an electret mic, and not the breakout board. I was ...
-2
votes
2answers
110 views

130V DC Motor Control

I am interested in building a control circuit for a motor. More specifically this motor. The model I want to control is the 130V model, 0.48A, which should make it at ~62W for the motor, and 1/17 ...
0
votes
1answer
91 views

how to provide a steady voltage, in case of source voltage drop due to heavy consumers in the circuit

I am designing an arduino circuit in which the power source is a battery connected to some heavy current consumers, these consumers are intended to work for short time and infrequently, my question is ...
2
votes
2answers
290 views

I/O series resistor

I've read that digital I/O pins should have a resistor in series in order to limit noise. Should one also use such approach when interfacing with the I/O pins of an arduino, or is that already done on ...
0
votes
3answers
90 views

Voltage decreases on higher current

I have a circuit composed of Arduino Mini Pro 3.3V and GY-GPS6MV2 (GPS Ublox NEO-6M). I have tried to power it with 3 different sources: 3xAA NiMH in serie connected to RAW pin of Arduino and using ...
14
votes
2answers
3k views

Can Arduino be used in commercial products?

Is it legal for me to sell a product that's built with an Arduino? I know that it's open source, but does that mean I can sell my product for profit, or only for use in prototyping?
0
votes
1answer
66 views

Arduino Bluetooth BLE boards function as iBeacon emitters, or receivers?

I have just purchased the estimate iBeacon developer kit and am doing research on iBeacons, building demo apps using Adobe AIR with native extensions. I was curious if any of the many Bluetooth BLE ...
1
vote
1answer
113 views

Low frequency sinus generator

I would like to build a sinus frequency generator that can be controlled via an Arduino. Sinus frequency would be in the low frequency regime (below 100 Hz) with a voltage around 2.5 Volts peak to ...
0
votes
3answers
404 views

Can I do without I²C pull-up resistors?

I am trying to produce a small circuit, and I am looking to reduce the part count. I recently added an I²C EEPROM which is used once when the system boots up, along with this EEPROM I added two ...
0
votes
1answer
35 views

Arduino Ground reference plane

There are three GND pins on the Arduino UNO pinout. As I'm trying to design a mixed signal PCB to act as an Arduino Shield, I wonder how I should connect those pins, i.e. to the analog or digital ...
1
vote
1answer
284 views

Very hot mosfet when powering an led strip

I'm basically following this instructable which is using an arduino to control an rgb led strip. I have wired it up exactly as shown, although I didn't use a breadboard i just soldered everything. ...
3
votes
2answers
3k views

Can you play Chords on Arduino with a single piezo speaker?

I need to be able to play two tones at once and i have the arduino uni with a small 8ohm piezo speaker. Is it possible to do so? Sample Code ...
0
votes
0answers
15 views

Connecting the nRF24L01+ to the nRFgo studio

I have recently acquired the Development kit for the NRF8001 from Nordic Semiconductor. The kit states that it works in conjunction with the nRFgo starter kit, or can be directly interfaced as a ...
1
vote
1answer
214 views

XBee Coordinator API not receiving data from Router AT pin 20

A Xbee Series 2 in Router AT configuration with a potentiometer wiper output connected to XBee's pin 20 AD0 is supposed to send the analog data every 100 ms. It was ...
1
vote
2answers
432 views

Single and Double Click on Arduino Multiplexed Buttons

On my arduino project i have 8 buttons connected to a 4051 Multiplexer. I would however like to add single and double click funcionalities to each of these buttons, but i can't find a way to do it. ...
3
votes
2answers
4k views

How to make XBee sleep?

Arduino Fio with XBee radio. I have read the XBee manual (pg. 24-25), trying to figure out how to put it to sleep, but what I tried did not work. Then I found an example sketch using XBee sleeping, ...
0
votes
1answer
24 views

Encoder sampling rate realization

I know that questions from a mechanical engineer might sound a little naive to you :), but here I go: I am trying to use an Arduino Uno as the brain for a DC brushless motor that we have for a ...
0
votes
4answers
57 views

Using an SSR photoelectric sensor with Arduino

I'm wondering if I can use this photoelectric sensor with an Arduino. I don't have much experience with these sensors or with relays, and I'm sometimes confused by output switch ratings, so I can use ...
0
votes
0answers
20 views

Lockup while evaluating Wire.requestFrom function (Arduino) [migrated]

I am currently working on a Arduino project that combines an InertiaOne IMU sensor board (from Atmel), with an Arduino UNO and two motors driven by a Makeblock driver board. All sensors communicate ...
0
votes
1answer
49 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 ...
0
votes
2answers
86 views

Is it possible to change a USB's enumerated descriptors (from the OS side) after plugging it in?

I don't mean as in change the descriptors built into the device, but the descriptors that the OS has enumerated. Can this be done from the OS side without touching the USB device? For example, can I ...