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
1answer
12 views

What happens if I accidentally connect an Ethernet device to my 1-wire bus?

I have built a networked temperature sensor by connecting several DS18B20 temperature sensors to my Arduino. I've tried to visualize the setup with this schematic (sorry if this doesn't make any ...
1
vote
0answers
13 views

Accessing Linux on Galileo

this is my first time posting. I seem to have hit a dead end trying to access my Galileo’s onboard Linux. I’m working on a Mac OS X. I’ll take you through all the steps I have been: I’ve set up ...
1
vote
1answer
37 views

How to choose what a power supply to drive 2 x 10watt RGB LEDS?

I'm trying to figure out how to determine what power supply I should be using for different types of LEDs for this and future projects. I have 2 x RGB LEDS: Forward Current: 350mA Forward Voltage: ...
0
votes
0answers
27 views

Triple Axis Accelerometer Breakout - ADXL335 synchronise

I have three ADXL335 Triple Axis Accelerometer Breakout boards. I wish to measure the the acceleration of a human leg as it walks at three points (hip knee and ankle). I want this to log this data in ...
0
votes
0answers
29 views

Cascading PID DC Motor Position & Velocity Controllers

I'm trying to build a robot with a differential drive powered by two DC motors. First I implemented a PID Controller to control the velocity of each motor independently. Estimated the TF using the ...
0
votes
1answer
46 views

Controlling various Arduinos with Android

I have an upcoming project which requires me to use about 8 different Arduinos, probably more. They all perform a light show which turns off and on various LEDs at different timings to simulate a ...
0
votes
1answer
60 views

Reading switches without a common ground from Arduino

I'm trying to interface a steering wheel control interface with an Arduino. The interface connector has 6 pins, A to F. These ...
0
votes
0answers
30 views

How do I trigger a 1 wire capacitive touch button?

I have a lighting controller in my house for my under cabinet lights. It has a capacitive touch remote button with a 1 wire interface to the controller. How can I trigger this 1 wire remote with an ...
4
votes
3answers
429 views

Extending LED length

Completely new to electronics, I've just begun to play with an Arduino. I was wondering, if I wanted to make an LED sculpture, what is the correct way to extend the legs of each LED so that they stand ...
0
votes
0answers
35 views

Error in PWM duty cycle readings [on hold]

I am working on a cruise control system. The duty cycle display 100% when the throttle controller produced both positive and negative result. I am okay with Duty cycle of 100% when throttle is ...
-2
votes
0answers
48 views

interfacing sata with arduino [on hold]

First off, I already know arduino is too slow to interface with SATA, but thats the point of this project. I am trying to make a SATA sheild for the arduino uno. All I need is documentation on the ...
0
votes
0answers
32 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 ...
1
vote
0answers
45 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
41 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
74 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 ...
1
vote
1answer
57 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
2answers
59 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
0answers
22 views

RFID smart bookshelf and Arduino [closed]

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 ...
0
votes
3answers
60 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 ...
-1
votes
1answer
46 views

How to Control a 3D Printer Extruder [closed]

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
3answers
59 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 ...
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
-1
votes
0answers
69 views

SEPIC hardware problem [closed]

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
1answer
109 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
81 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
60 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
75 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 ...
0
votes
0answers
36 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 ...
0
votes
1answer
120 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 ...
1
vote
2answers
74 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 ...
2
votes
2answers
295 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
4answers
126 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 ...
0
votes
1answer
92 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 ...
0
votes
0answers
18 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
289 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. ...
0
votes
1answer
36 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 ...
0
votes
3answers
405 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
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
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
51 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 ...
-2
votes
2answers
115 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
70 views

Potential project: Wireless Security Camera with the Arduino Yun

I have been following Arduino and Raspberry Pi projects closely for a while and I am pretty keen on giving one a go. I have no real electronics assembly experience but can program. I have chosen the ...
1
vote
1answer
115 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 ...
4
votes
3answers
400 views

Manufacturing Microcontrollers for portable vaporizer by first prototyping with Arduino

This question I have mainly has to deal with approaching an electronics company with just a working Arduino Nano prototype. Say I want an electronics component manufactured which consists of an ...
0
votes
0answers
5 views

Arduino stacking wifi and gsm shield [migrated]

I'm fairly new to this and I need some help before I buy anything... If I understand correctly I can buy an arduino, couple of shields and just stack them one onto another if they are compatible... ...
1
vote
1answer
83 views

Proper PCB grounding with several general purpose ICs

I'm designing a general purpose Arduino shield pcb and right now I'm struggling to find a proper ground layout. ICs on the board: 12->5V and 12->10V @5A switching DCregulators, several H-Bridge motor ...
1
vote
3answers
131 views

Arduino TMP36 not enough resolution — how to improve

I have connected a TMP36 to an Arduino Uno, and eventually figured that the 10-bit resolution allows for the smallest step to be 4.8mV. Using the proper conversion results in half degree temperature ...
1
vote
4answers
94 views

Datalogging on serial flash memory

I am working on a datalogger that writes positions from GPS to serial flash W25Q64FV. I plan to write GPS data every second. I have couple of questions: With this flash memory it is possible to ...
0
votes
0answers
53 views

Is it possible to program a few Ardunios at the same time? [migrated]

I have 10 Arduino Pro Minis and one Arduino Uno. Via breadboard, if I connect Pro Minis in parallel, can I program all of them at same time? Is it possible?