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.

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2answers
29 views

Slowest transmission speed supported by TOSLINK TX and RX?

I'm writing an Arduino communication library that uses differential Manchester coding (see: http://forum.arduino.cc/index.php?topic=257985.0). I'm wondering how to communicate between two Arduinos ...
1
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1answer
30 views

Connecting common of relay with main cable of 240VAC

I trying to control my turntable switch with Arduino. This is a toggle switch with 3 wires one wire is for CW rotation the other one is for CCW and the other cable is main with 240VAC. I am using this ...
1
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3answers
42 views

Low power serial bluetooth module with Arduino

I plan to use the HC-06 serial bluetooth module with an Arduino Leonardo. To my knowledge, the Arduino's serial pins output at 5V with 40mA of current. The HC-06's datasheet says it will accept input ...
1
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2answers
57 views

I'm looking for the simplest way to produce a 1-bit high resolution (1080p or so) DVI signal

It doesn't need to be high performance, I just need to draw a bit mask. I'll be driving it from a micro controller, arduino or perhaps a BeagleBone Black. The application is to produce structured ...
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votes
1answer
74 views

RAW USB data over IP even through WiFi

For very special project I need to transfer data from a USB device to another system remotely as RAW "commands". The source device is something like a security dongle (not exactly but is a good ...
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1answer
29 views

Adafruit trinket power question

I am reading the Adafruit Trinket tutorial here. It states that BAT+ is used for battery INPUT: If you want to power the trinket from a battery or power adapter or solar panel or any other kind ...
2
votes
2answers
106 views

Connecting power source to Arduino's 5V pin

I have an Arduino board connected to a Neopixel Ring. This Ring draws more than 0.5 Ampere, so it needs its own power supply (not drawing power via the Arduino board) I found this schematic that ...
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0answers
19 views

AC Linear Actuator Driver for Arduino

For experimental purposes I want to build a 1-axis Polar Tracker and use an Arduino as a PLC unit. As I know it's necessary to use an Opto-isolator to prevent high-voltage from affecting low-voltage ...
0
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0answers
44 views

RGB LED Strips with Arduino [migrated]

I am trying to control an RGB LED strip with an Arduino. I have followed the tutorials in both of these websites: Using MOSFETs: https://learn.adafruit.com/rgb-led-strips?view=all Using LED ...
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0answers
4 views

Serial communication between pc and arduino via RS232 using c++ [migrated]

I am trying to communicate with my arduino duemilanove via an RS232 cord. I simply want to be able to send a byte (or char) to my arduino from a desktop application. The Arduino is plugging into USB ...
0
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1answer
27 views

Measuring pulse using an EMG device

For another project I once bought the following EMG sensor kit: https://www.sparkfun.com/products/11776 Now, I would like to know if it is possible to measure the heart pulse using that EMG sensor ...
0
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1answer
55 views

USB lights up simple circuit but not coin-cell

I have 13 adafruit LED sequins in parallel hooked up to a CR2032 coin cell. This cell is also hooked up to an adafruit Gemma board (Arduino-like board using an Attiny85). Pads D0 & D1 on the Gemma ...
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0answers
5 views

TI CC3000 & Arduino Uno [migrated]

I bought a CC3000 Wifi Shield from Sparkfun and attached it to Arduino Uno board. As first thing I tested the board with the board test example: SparkFun CC3000 - Board Test CC3000 ...
0
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0answers
13 views

Connecting Arduino Android Wirelessy [migrated]

I am working with Arduino and Android. I am interested in connecting Arduino (Mega 2560 ADK) to my Android tablet (Nexus 7) wirelessly. The chepaest option is via bluetooth but the communication in ...
1
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1answer
32 views

Arduino I2C level conversion

I'm working with Arduino Uno (Rev 3) to interface a DRV2605 haptic driver to control several ERM/LRA motors using I2C. As I look at examples on the web, I see everyone uses a I2C level conversor to ...
0
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2answers
66 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 ...
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0answers
30 views

Accessing Linux on Galileo [on hold]

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
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1answer
49 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: ...
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0answers
33 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 ...
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0answers
44 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 ...
1
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1answer
56 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
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1answer
64 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 ...
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0answers
34 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
436 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
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0answers
35 views

Error in PWM duty cycle readings [closed]

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 ...
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0answers
50 views

interfacing sata with arduino [closed]

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 ...
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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 ...
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0answers
47 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 ...
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votes
1answer
49 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
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3answers
76 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
59 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
63 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
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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
2answers
64 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
50 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
62 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 ...
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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
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votes
0answers
70 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
112 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
82 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
62 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
39 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
76 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
296 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
129 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
95 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
20 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 ...