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.
2
votes
2answers
181 views
What is the equivalent thevenin resistance of a digital output port on an Arduino Uno R3
How would I determine the thevenin equivalent resistance?
1
vote
2answers
607 views
Arduino UNO Timer issue
i seem to be facing a weird issue here. First time working with AVR timers. Basically what I am trying to achieve is to set timer2 (with prescaler val @ 1024) and use CTC mode (with val 78) to get 5ms ...
4
votes
1answer
544 views
How to use an ESC
I'm new to RC related modules. Today I got my Hobbywing's Skywalker 20A brushless esc.
Manual is here.
I also have a brushless outrunner motor (HL3512)
I ...
4
votes
2answers
2k views
Arduino Uno, weird characters sent to COM (SoftwareSerial)
I'm trying to send ASCII characters from Arduino UNO to a computer serial port. I'm using a cable with a male COM connector, attached to the computer's serial port, and three wires (TX, RX and Ground) ...
1
vote
1answer
427 views
Kinect data to a microcontroller
Before I begin, I understand this is a very broad and open ended question, please be patient with me. I am a complete newbie to this. After looking around I found various ways of interacting withe ...
0
votes
1answer
672 views
TLC 5940 PWM driver blank input and pull-up resistor
I've read some of the data sheet for the TLC 5940 and it states the following about the BLANK input:
Blank all outputs. When BLANK = H, all OUTn outputs are forced OFF. GS counter is also reset. ...
1
vote
3answers
2k views
Measure weights with arduino
I want to measure weights with arduino. After the measurements, i want to analyze the weight data of the measured objects.Precision is not very important, but it should be work in the range of 10 to ...
0
votes
1answer
161 views
Is it possible to connect a reed switch to two separate arduino boards?
I'd like to add a bit of redundancy to a security system. I use reed switches for doors. How can i safely connect the same reed switch to two separate arduino boards? (the boards are not connected ...
1
vote
4answers
1k views
ATTiny25/45/85 as I2C master AND slave
I'm still trying to wrap my head around I2C as well as the ATTiny. I've found plenty of tutorials on how to use the tiny as an I2C slave as well as master, but is it possible to use it as both at the ...
2
votes
2answers
217 views
Inductor ground, where to put it
So I'm building a tachometer for my car. It's pretty simple, basically I have a wire wrapped around the spark plug wire about 10 times, and the 30-50k volts travelling through the spark plug wire ...
0
votes
1answer
256 views
Setting the prescaler on timing circuit for LC meter?
I am trying to build an LC meter using the Arduino platform. It's based on this tutorial here.
Specification: 10nH to 1000nH, 1uH to 1000uH, 1mH to 100mH and capacitance from 0.1pF up to 900nF.
...
4
votes
2answers
320 views
Powering RGB LED's and using a PWM chip; series or parallel?
I'm working on a hobby project where I will be using an Arduino board and a TLC 5940 to control 5 different groups of RGB LED's. The number of LED's in any particular group will not necessarily match ...
0
votes
1answer
538 views
electrical switch controlled remotely via mobile bluetooth arduino
Without arduino what other ways? If I use arduino should I use ardunioBT and write a mobile software for communicating with arduinoBT. Or using Amarino with a arduino board is better (as amarino has a ...
1
vote
1answer
159 views
Connecting arduino to power another device
I have an arduino board which I want to use to give power to a device which uses two 1.5V batteries. I think I have to remove the batteries from the device and control the power supply via arduino, ...
2
votes
2answers
431 views
Arduino as simple VT100 Terminal
In order to use my GLCD + Arduino as a display for LCD4Linux, using the LCD4Linux SimpleLCD Driver which sends out a subset of VT100 codes (CR and LF).
I have managed to isolate the VT100 codes from ...
1
vote
3answers
212 views
Hall-effect switch or photointerrupter
I'm dealing with a small automation project, a rack and pinion system controlled by an Arduino card with two limit switches to ensure that the rack moves within the boundaries.
I have been trying both ...
3
votes
2answers
1k views
Making two Arduinos talk over SPI
I'm trying unsuccessfully to make two Arduinos talk using SPI.
I found this great tutorial. The SPI Master send a constant string each second to the SPI Slave, which resends to the USART for ...
0
votes
2answers
236 views
Logistical issue with power transistor and arduino
I have a transistor which will be triggered by an arduino digital pin. When the transistor switch is closed, ~5 A is going to flow from the collector to the emitter. However, I was under the ...
2
votes
1answer
2k views
How to connect together: Raspberry, Arduino, PC PSU, Usb Hub, Usb Hdd - without issues?
A pc psu provides power for:
arduino uno (via de standby 5v power + ground so it always has power)
raspberry pi (via a 5v + ground connection)
usb hub (via a second 5v + ground connection)
...
0
votes
0answers
128 views
Using both SPI.h and Wire.h I am stuck waiting for SPI transmission
I am using the Si4735 shield and Arduino Uno to play FM radio. When I try to perform some tasks on the Si4735 I need to do an SPI transfer and I use this function:
...
5
votes
3answers
199 views
Touching Person-to-Person
Is there any way to detect skin touching or no-touching between two people? Maybe using capacitive sensing or any other methods? It doesn't need recognizing gesture, only yes-or-no-touching.
The ...
0
votes
1answer
521 views
How to power an arduino controlled string of RGB LED's from separate power source
I'm new to electronics and working on a hobby project that will have an arduino board running 5 separate strings of RGB LED's. I'll be using a PWM chip (TLC 5940) so I can independently control tho ...
4
votes
6answers
908 views
Arduino Serial print changes behavior of program undesireably
I'm using a loop counter, declared in a header:
int loop_counter = 0;
I use this counter to trigger an event every so often. I used to use a modulo for this same ...
4
votes
2answers
2k views
Trying to build gps tracking device
I am an engineering undergrad trying to build one gps tracking device with features like live streaming, current position, average speed, etc. (and if possible then sound etc.) from some computer ...
2
votes
5answers
969 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 ...
3
votes
2answers
452 views
Small Wireless Gyroscope & Accelerometer
I'm looking to assemble a very small circuit to transmit data from a gyroscope and/or accelerometer to a computer via wi-fi. It also needs to be self-contained (so should contain a power source).
The ...
1
vote
1answer
143 views
Arduino USB host get raw events
For a project I'm planning, I'd like to be able to plug a USB device into an Arduino and capture the raw usb events (handshake, interrupts, etc) and reply to the device on an equally low level. I've ...
1
vote
1answer
753 views
Programming ATtiny84 using Arduino (leonardo)
I am trying to program the Attiny84 using an Arduino(Leonardo). I have seen this Shrinkify video. -and I have been following this Programming tuturial.
I have connected everything. Using Arduino ...
5
votes
3answers
775 views
Possible to output sinusoidal signal with an Arduino?
Is there a way to output a sinusoidal wave with an arduino? Perhaps using PWM? It would be nice to be able to simulate something around 10kHz. Is this even possible with the hardware on the Uno?
1
vote
1answer
538 views
Measuring Arduino internal voltage reference with respect to Vcc
How do I read the internal reference voltages of the Arduino (Ardino Mega, ATmega2560, specifically the 2.56v reference) with respect to the input voltage?
I'm trying to measure the remaining battery ...
2
votes
1answer
356 views
Motor shield R3 does not supply full power
I'm currently trying to build a small independent rover from my old Lego Technics set. Currently I power two 9v DC motors (2838) using an Arduino motor shield R3 in combination with an Arduino Uno. I ...
0
votes
1answer
389 views
Using an Arduino as an AVR ISP (In-System Programmer)
I have set up two Arduino Uno's as seen in Using an Arduino as an AVR ISP (In-System Programmer):
However, when I try to burn a bootloader I get an error. Do you think I have the wires wrong? The ...
0
votes
1answer
701 views
Arduino Uno replace with Atmega8
Can I take out the Atmage328 and replace with a Atega8 for programing instead of trying to program using a breadboard?
0
votes
0answers
32 views
How do I program an atmega8 using Arduino Uno [duplicate]
Possible Duplicate:
Arduino as AVR Programmer
I am trying to upload a program to a separate chip Atmage8 on a breadboard. Do I just need to connect some wires from the Uno to the ISP of the ...
1
vote
1answer
112 views
I think my XBee XSC is broken. Am I missing something?
I have two XBee XSC 9600-baud chips, and I've been trying to make sure I know how to use them before integrating them into my project. Other people have used these same boards successfully, so they ...
2
votes
1answer
341 views
real time clck -RTC DS 1307- to Arduino
I am trying to connect the ds1307 to Arduino to get the the time on the LCD and I used this circuit in my project and I tried the example code in the library but it didn't work. What could the problem ...
2
votes
2answers
3k views
Can a home security system be built with an arduino? (40 sensors maximum, usb interface to pc)
Considering these requirements:
40 modules or sensors (one movement/presence sensor or one windows/door open/closed sensor)
read state (boolean, or 0/1) of all modules as fast as possible (once per ...
4
votes
4answers
774 views
Driving LEDs at long distance
I'm looking to drive 52 LEDs (datasheet), around a large inflatable tent. The LEDs have a forward voltage of 3.3V, at a maximum of 20mA.
I'm thinking of using the NXP SAA1064 I²C 16-channel LED ...
3
votes
3answers
521 views
Simplifying a relay network
I'm currently trying to design a relay network for a piece of laboratory equipment (PPMS). I would like to describe what the setup is, what I am doing now, what I hope to do, and how I hope to do it. ...
1
vote
1answer
1k views
Making an echo sketch using SoftwareSerial and Bluetooth
In order to test my Arduino UNO + Sparkfun Bluetooth Mate Gold I've written this little sketch;
...
0
votes
1answer
65 views
NTE2013 base inputs
I have an NTE2013 which I want to use with an Arduino. I may be driving the base pins directly off of the Arduino or perhaps off of a 74HC595. Should I use resistors between the outputs and the base ...
2
votes
2answers
154 views
Gyro for Arduino
[Background]
I've assembled a quadrocopter and now I'm going to design a flight controller for it, using Arduino. I can not use any of flight controllers, which you can buy in the store, only ...
1
vote
1answer
789 views
Can this used with Arduino to send SMS to phone?
I want to know the possibility of using this TC35 board to send SMS to my phone?
If there is possibility, what about codes? Does anyone have relative codes for it?
3
votes
5answers
2k views
Multiplexing two 7-Segment displays (Ghosting issues)
I am currently working on a simple scoreboard using two 7 segment displays, a shift register (74HC595N), two PNP transistors (2N3906) and an arduino uno.
Each 7 segment display is common anode, ...
18
votes
5answers
802 views
Is it advisable to stay stick to Arduino IDE?
Is it better to move to AVR studio (or any other better alternative?) over the Arduino IDE. Feel like it's so simple and childish. I need to know the experts idea and choice..
1
vote
1answer
444 views
Multiple 4-Digit 7 Segment Displays with Arduino
I have 3, 4-Digit 7-Segment Displays from Adafruit, and the included docs/ libraries say I should connect the display to pins A4 & A5. However, I have three of the displays, so I am looking for a ...
5
votes
1answer
302 views
Can i use a SSR for switching a fluorescent light?
Can I use a SSR for switching a fluorescent light on or off? Specifically, can the SSR last for a long time, and can it withstand a very large number of on/off switchings? I would also appreciate a ...
4
votes
1answer
367 views
Recording Servo/Motor movement with arduino
Hi I'm really new to Arduino projects and don't really know how to start. I'have to do a project for university. The programming part should be no problem but I don't have any experiance with ...
7
votes
1answer
695 views
Arduino + gyro/accelerometer == flight controller …?
Can I use the combination of an Arduino Mega + MPU-6050 gyro/accelerator module instead of a flight controller? Is there something else needed?
It is said that the gyro/acceleration can be used to ...
-3
votes
1answer
122 views
What type of arduino board do I need?
I need some help with choosing an Arduino board or maybe something else for the task that I need to do.
I want to have a board that will get a input (power signal) to the board and that will send a ...
