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. Arduino can sense the environment by receiving input from a ...
3
votes
1answer
46 views
Arduino-controlled slot cars - alternative to MOSFETs for speed control?
I'm attempting to control the speed of two slot cars in a set using Arduino.
Each car is controlled by a controller with a variable resistor that looks like this:
They're wired in parallel to ...
-5
votes
0answers
27 views
Arduino board for footprint sensor? [closed]
Would a Arduino board work to develop a footprint sensor for an installation? Which arduino board shall i get for this?
-6
votes
0answers
31 views
Which Arduino board to get to develop a face recognition system? [closed]
Which Arduino board to get to develop a facial recognition system?
0
votes
2answers
80 views
What waterproof temperature sensor do I need to measure water temp using an arduino mega?
I consider myself a complete novice when it comes to electronics. My current project consists of measuring water temperature using an arduino mega. What parts will I need to complete this project? ...
1
vote
0answers
52 views
Arduino Mega run on 2 AA batteries? [closed]
I am completely new to electronics and I have a question. I read that the Arduino Mega runs on 5V and that a supply of 6-12V is recommended for stable operation of the board.
So what if I wanted to ...
0
votes
1answer
54 views
Controlling 23K256 SPI RAM with Arduino
I'm trying to interface with a 23K256 SPI RAM IC using an Arduino Mega 2560. I can't use the standard SPI pins, since I'm using an ethernet shield and it doesn't play nicely when SS is set high.
So, ...
0
votes
3answers
147 views
How do electrical body fat detector work?
I would like to build me own electrical body fact calculator from a microcontroller (the Arduino), but I would like to know how does it work. I have a 5V analog reader, So I guess I sould calculate ...
3
votes
1answer
75 views
2.4GHz Warmer/Colder game based on signal strength
I'm currently looking for options to build a 3 piece game for an outdoor activity company based around the warmer/colder game.
Two teams are each issued a receiver, and each team starts around 400
...
2
votes
3answers
199 views
Why are red LEDs so dim & how do I make them brighter?
Background
I am an electronics novice/hobbyist who is recently using an Arduino connected to a breadboard to prototype a set of navigation lights for a remote controlled hexacopter that I am ...
0
votes
0answers
48 views
What is an “API-formatted packet”?
Arduino.cc recommends this page as an introduction to XBee radios.
Physical Computing at ITP | Tutorials / Xbee Basics
You generally choose to work in either API mode and AT mode and can't use ...
1
vote
1answer
77 views
How do i connect these modules to an arduino?
I am trying to connect a:
Wave shield
LCD Screen
Keypad
To an Arduino Uno.
There isn't enough ports for all these modules and I am wandering how i can extend it. Do I have to buy an extra ...
0
votes
4answers
149 views
Arduino-controlled slot car set - Why are my MOSFETs burning out?
I'm attempting to control the speed of a slot car using an Arduino and a MOSFET.
I'm new to MOSFETs, however, and while my setup works for a moment, eventually the MOSFETs (N-Channel) open up, and ...
2
votes
5answers
183 views
How to power 24 7-segment displays with Arduino?
I'm working on an Arduino project where I need to power 24 7-segment displays (model Kingbright SC56-11YWA).
I decided to control them using 8 bit shift registers (model 74LS164N). This is ...
0
votes
1answer
103 views
Wheatstone circuit not functioning
I have 3 dummy strain gauges suffering no strain (all 120 ohms, G.F=2.1) and the fourth (same characteristics) is meant to pick up torque at 45 degrees on a rod. It has been verified on an external ...
0
votes
4answers
105 views
Overvoltage i/o pin fried my arduino uno. Can it be saved?
I accidently put 12V into one of the i/o pins and fried the board bad enough to go through the usb and shut off my laptop. Is the whole board junk now or just the atmega?
2
votes
1answer
72 views
Configuration for two XBEE S1 together
I am trying to configure two XBEE S1 both of them using the 10EC firmware.
I tried to set this settings on the first one and the second one :
ATVR ATVR
10EC 10EC
ATID ATID
2001 ...
2
votes
3answers
91 views
Using a counter to reduce pin counts for SPI slave selection
I've got five SPI SRAM chips, which I want to control off a single Arduino. I've seen setups like this, which share SCLK, MOSI and MISO, with separate SS pins:
(image courtesty of Wikipedia)
...
1
vote
2answers
85 views
Female header with common pins?
I'm looking for a .1" pitch female-female or female-male header with common pins, i.e. all the pins are connected. I'm sure it exists, I'm just having trouble coming up with the right keywords to find ...
4
votes
2answers
188 views
Interfacing Arduino to C64's tape port
I'm working on a project where i'm using my Arduino to stream TAP tape data files from my PC to the C64. The software side of the project is going well however i'm still new to electronics and i don't ...
1
vote
4answers
271 views
Reasons using RS232 instead of USB
I was trying to figure out the real reasons why USB signals are converted to RS232 serial. I came to understand that(if I am not wrong) USB is faster and synchronous, whereas the chips are using UART ...
0
votes
2answers
50 views
Amplifying strain gauges on an arduino
I have 4 standard mild steel foil strain gauges bonded to a steel bar in a wheatstone bridge arrangement. They are implemented into a circuit with the INA 125P amplifier. I only manage to use about a ...
0
votes
1answer
45 views
Strain gauges burned out in half bridge
I've been using a full wheatstone bridge (4 strain gauges) to read stress on a steel bar, through a circuit mounted on an arduino breadboard. This seemed alright. I later used two strain gauges of ...
2
votes
2answers
67 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
#define c 3830 // 261 Hz
int tone1 = 10; // ...
0
votes
2answers
57 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 ...
0
votes
2answers
174 views
How do I read these (Arduino) schematics?
I am currently trying to learn about circuit boards and microcontrollers. On the Arduino webpage I found these schematics of the Arduino Uno. But I am not sure, how to read that.
There is a big ...
-2
votes
1answer
73 views
Wireless LAN to Serial conversion [closed]
I am reading about Arduino Ethernet and Wifly shields. I couldn't find how the received Wifly or Ethernet signals are converted and sent to Arduino board. I mean TCP/IP to serial.
Is is an SPI to ...
0
votes
2answers
69 views
How do i put a DC motor on an arduino motor shield and use it
I'm building a robot using an Arduino UNO and the standard Arduino Motor shield.
I have two 9-12V DC motors. I'm open to the possibility of using servos, but I'm currently trying to use these ...
3
votes
2answers
88 views
USB to serial adapter
I am working on Arduino board for a while. One thing I do not get is why there is a chip called "USB to serial adapter" on Arduino board.
Isn't USB already serial. What does it mean USB to serial? Is ...
0
votes
0answers
41 views
Is there a wireless shield for the Teensy? [closed]
Is there a wireless shield-like adapter for the Teensy? It would be much better to put in more product-like things than an Arduino with a wireless shield.
0
votes
0answers
66 views
Starting to tinker, any advice? [closed]
Possible Duplicate:
How to become an embedded software developer?
What good resources are there for a high school student to start learning electronics?
I have recently purchased a ...
0
votes
2answers
88 views
Distance between 2 arduino's using rf links
I currently have a setup where I send a char using a Tx of 434MHz and an Uno to a Mega with a Rx. The Mega counts how many times it receives the char and then if it falls below a certain number it ...
3
votes
2answers
107 views
What is the proper and up to date method for multiplexing digital inputs?
So Im following the diagram here for wiring up a MC14067BCP:
http://fluidforms.eu/docs/MultiplexedArduinoWiringDiagram.pdf
The only difference being that I am doing one set of 16 sensors and not ...
4
votes
1answer
84 views
Can an ATmega or ATtiny device signature be read while running?
While programming an ATtiny or ATmega, avrdude prints the device signature, in this example it is an ATtiny.
avrdude: Device signature = 0x1e910a
Can I read this signature on a running device using ...
1
vote
2answers
70 views
Measuring tiny voltage variation with Arduino ADC handing the rapid changes in control algo
I'm hoping I can get some advice, I have an industrial laser position sensor from SICK that outputs 0 to 10 volts. I used a voltage divider to scale it down to 0 to 5 volt range, and feeding that into ...
1
vote
2answers
233 views
How can I fix an AVRdude not-in-sync error when programming Arduino via USB-to-serial cable?
I'm trying to build this Ambient lighting for PC. This worked flawlessly on my Arduino Uno. My next step was to make it using "Arduino on a breadboard". So I bought a blank ATmega328 chip and burned ...
3
votes
3answers
109 views
Reducing the sensitivity of a PIR sensor?
I have several of these PIR sensors.
I am hoping there might be a way to reduce range/sensitivity to a very small field. Currently they are detecting motion about 15-20 feet away.
Does anyone know ...
0
votes
1answer
72 views
Relating position sensor voltage input to Arduino PWM % output
This is a general question, I believe it maybe a math question but it is for the Arduino platform.
I'm doing a ball levitation project that will keep a ping pong ball suspeneded at a setpoint in a ...
0
votes
1answer
109 views
Programming PIC18F2550 with an Arduino
I'm trying to implement a low voltage mode programmer for the PIC18F2550 in an Arduino Uno according to these programming specifications.
Bit-sequences are written to the PIC least significant bit ...
1
vote
2answers
113 views
How to communicate to ATmega328 with a PC
I need to connect the ATmega328 to a PC to show the datas that are gathered from the microcontroller, in Visual Basic .Net.
I have done it successfully using the Arduino board with USB cable.
But ...
1
vote
2answers
107 views
Controlling an electromagnet with Arduino
I'm just starting up with electronics and looking to control an electromagnet with the Arduino. I'm wondering what hardware setup will make the most sense to use to turn the electromagnet on and off ...
1
vote
5answers
114 views
Simplest way to upload sketches onto “hackduino” without having a arduino duemilanove
Update: The ATmega came bootloaded with the arduino software is that can simplify anything
I have this board:
I'm looking for a bone-simple way to upload sketches.
Ideally without buying ...
1
vote
2answers
110 views
Triggering buttons with a diode
total newbie here.
I was reading this post:
http://dduino.blogspot.com/2012/02/trigger-buttons-with-arduino.html
It is basically trying to trigger a button in an IC from an arduino(green) pin.
I ...
0
votes
1answer
50 views
Question on Profiling sample time on arduino atmega328
I am implementing a PID controller on the Arduino, I transformed my transfer function from the S domain to the Z domain and I require the sample time in seconds. This is how long it takes to get a ...
0
votes
1answer
66 views
How to send unsigned bytes through serial from arduino
I am using the sketch below to send the bytes of the frame buffer display.screen of 1536 bytes in size, to the computer over serial communication. The result of it to my java program is a byte array ...
0
votes
1answer
39 views
SPI setBitOrder question
This is more of the technical, i would try to test it via trial and error but i don't have extra equipment. Anyways, firstly if i set the SPI.setBitOrder(MSBFirst) transfer the command, for example ...
0
votes
1answer
62 views
My first arduino project: what parts do I need to create the simplest vehicle?
This is my first time in this electronics stackoverflow forum, and I´ve been reading about arduinco since some time now. And I just love the possibility to build a little robot.
I´ve done nothing ...
0
votes
3answers
142 views
What do I need to make this project?
I'm form a computer science background so I figure I should ask for advice on what I need to do this.
What I'm planning to do is program a microcontroller to keep track of time and flash LED lights.
...
1
vote
1answer
86 views
How does the Arduino IDE/build system work?
How does the Arduino IDE/build system work?
I noticed that they use the avr-gcc in the background,
but what do they do on top?
They seem to have their own "kind of C" language that transforms into ...
0
votes
1answer
76 views
beginning ArduPilot
i was browsing through the web when i came across the ARDUPILOT community page, i had heard about arduino but not ARDUPILOT,
now i have got a project to build a UAV, as a part of a student challenge ...
0
votes
1answer
70 views
Arduino to act as a switch for a remote
i have a wireless remote control for a light
it runs with 12v battery
it has two mini Omron type B3F momentary on switches (Mini Push Button Switches)
one button is for Light ON, the other for Light ...
