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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8 views
can't get arduino fio with bluetooth be to pair
I can't get my arduino fio with bluetooth bee paired with my mac. I got my application working with a different board (arduino uno) and USB connection. The code I'm uploading to my arduino fio is ...
2
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2answers
95 views
ATmega328P running on CR2032 has issues with timing/sleep code as voltage depreciates over time
I have an ATmega328P running at 16 Mhz on CR2032 with a few sensors and radio for about a week now. It started out at 3+ Volts and is currently measuring at 2.96 Volts. At present, I am not using ...
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2answers
50 views
What is the best way to power both my 5v 16 x 16 Neopixel matrix and the 9v Arduino that drives it? [on hold]
I have 4 Adafruit 8x8 Neopixel matrices interconnected to form a 16 x 16 matrix driven by an Arduino Mega. Right now I am using two different power sources to power the matrix and the microcontroller. ...
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2answers
49 views
How one uses level sensor?
I have bought a level sensor. I cannot find any documentation except this on the linked page. How do I use it with Arduino or anything else?
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1answer
37 views
Breadboard layout with speaker
This project is from Arduino's Examples page. The first fritz is from there. I managed to run that example without any issues. However, I had tried keeping the wires together so I tried to run the ...
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2answers
39 views
arduino due build-in interrupt debouncing
According to the SAM3X handbook it can do debouncing of interrupts "automatically", how would I enable that on an arduino due? The doc http://www.atmel.com/Images/doc11057.pdf states something about ...
1
vote
1answer
32 views
MFRC522 on Beaglebone Black
I am trying to get my RC522 to work on the BBB. It works great on my Arduino which is well documented e.g. here or here. My only requirement is to read the serial # of cards which are Mifare S50.
I ...
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0answers
30 views
need help finding a circuit diagram for LED display [on hold]
you may be able to help me find a circuit diagram for a project I am working on. I am looking for one that powers 4 strings of 16 or 20 3.2v max super bright LED's, like those used in solar/battery ...
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2answers
48 views
Can I embed this charger in a project?
I have been attempting to create a portable arduino gaming system. While I have tried normal 'AA' or 'AAA' batteries, they are too large, so have decided to use a lipo battery. I now have this, but I ...
2
votes
3answers
53 views
Shift Register turning on Transistor for LED Cluster
I have a question concerning using 74HC595 with two transistors to power a LED matrix. My goal is to make an 48 x 8 LED matrix using a cluster of 5 LEDS per unit (as opposed to only using one led as ...
3
votes
2answers
192 views
Can I use 74HC14 or NPN transistor instead of MOSFET as level shifter
I have SN74HC14 or BC548 / 2N2222 transistors. I need level shifter for I2C between arduino and RPi.
Here's simple circuit from the internet
Problem is I don't have any MOSFETs. Can I use NPN ...
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0answers
22 views
Arduino SPI connection WHO_AM_I register on IMU
I have an inertial measurement unit (IMU) sensor that communicates over SPI. I use Mega2560.
I want to read one simple WHO_AM_I register.
On documentation:
...
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0answers
73 views
I am trying to create a pulse circuit with a 24Hz/0.6 duty cycle, a voltage somewhere between 1.5-9v and an amperage between 50-100mF using an arduino
I am trying to create a pulse circuit with a 24Hz/0.6 duty cycle, a voltage somewhere between 1.5-9v and an amperage between 50-100mF. So far, I've tried using an Arduino to fire a relay (using the ...
1
vote
3answers
46 views
How to call void function in response to receiving serial data (Arduino)
I'm new to Arduino, and I'm trying to decipher this code. There are various void functions that I am trying to call in response to receiving serial data (the Monitor outputs "Please enter valid ...
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1answer
51 views
Arduino hinge rotation sensor
I'm having trouble finding a specific component for a project I'm working on. What I need is a sensor that can act as a hinge (or can measure the rotation of a hinge) and tells the degree of rotation ...
1
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2answers
55 views
Trouble with L297 pins
So I am having trouble with a circuit I am building for a stepper motor controller, I am currently following this schematic
My problem is that I don't really know what the Vref, control, sync and ...
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0answers
16 views
RN 171 UDP Configuration not working?
I am trying to use a RN 171 module to send Data using UDP. The RN 171 is connected with a voltage regulator and this is connected to the laptop. I did all the configuration
looking at the data sheet:
...
2
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1answer
50 views
Arduino Battery Over-Discharge Protection (O-DP)
I am getting an Arduino Uno soon, and am planning to run off a 8-cell NiMH battery pack (through the power jack). Assuming a .9V cut-off per cell, that'll mean a 7.2 cut-off voltage. How would I wire ...
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3answers
39 views
DC regulator ground with Arduino [duplicate]
If I wanted to control several ICs that exceed the current rating of an Arduino 5V supply pin with an external DC regulator (which also would power the Arduino itself), should the ground planes of the ...
3
votes
0answers
62 views
For which type of serial communication is Arduino Severino designed? [migrated]
Arduino has become quite costly where I come from (2/3 of the price of Raspberry PI) so I have created an Arduino Severino clone.
I had used the device with the RS-232 Usb-Serial converter. But after ...
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0answers
11 views
Arduino and XBee Series1 [migrated]
I have actually reap 3 numerical values (3 sensors) from a remote XBee module and then manipulate these 3 signal with an Arduino card attached to another XBee module. To do this, I chose to use the ...
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1answer
58 views
Help using less pins controlling 8ch relay
I know this has been answered somewhere but can't find the solution online.
I have an 8ch 5v->120VAC relay controlled by arduino and need help using less digital pins. All channels need to be ...
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0answers
36 views
Is there an influence of accelaration on the gyroscope data
I want to create an application that measures the horizontal position of the device while accelerating (positive and negative).
My biggest concern is that the gyroscope data will be influenced by the ...
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0answers
20 views
HS0038 IR Seonsor on Arduino Robot
This year for the Robocup Jr. Soccer competition, my school brought an Arduino Robot. We also brought some HS0038 IR sensors, but can't seem to figure out how to connect or use them.
How would we go ...
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2answers
57 views
Is it possible to change a USB's enumerated descriptors 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.
For example, can I plug in a default Arduino UNO scripted to send keyboard keystroke ...
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3answers
55 views
Olimex/ATMega328 Reading from UART and sending to USB
I'm getting frustrated with my electronic knowledge, because I want to do this simple thing:
Olimex 328/ATMega328 reads data from UART (Olimex MOD-PULSE or whatever) and forwards it to the USB Port ...
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1answer
66 views
Arduino pin frequency for persistence of vision (POV) project
Arduino Uno has 4 pins that run at 960 Hz and 2 pins that run at 490 Hz.
Are those frequencies fast enough that I can change the strips that lights up the LED and create the illusion that it lights ...
1
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1answer
37 views
How to reset ATmega328P fuses using Arduino Pro Mini and USBasp programmer?
I think I bricked two ATmega328Ps when I was trying to burn new bootloaders using Arduino Pro Mini, the USBasp programmer and the Extreme Burner AVR software. I had two ATMega328p with bad booloaders ...
3
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1answer
32 views
Arduino audio output via R-2R DAC - biasing output for piezo speaker
I followed a tutorial on 8-bic DACs using an R-2R resistor ladder.
I am outputting a sine-wave using data from 0 to 255 on pins 0-7. This goes through the pins into the R-2R DAC producing an analogue ...
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2answers
60 views
Wifi on Nano v3.0 ATmega328P-20AU Board
I am seeking a nano version of raspberry pi. For my application, I just need 2 two usb ports, 1 for a wifi module and the second to power the board via a 5v usb. I dont need the hdmi inputs in the pi. ...
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3answers
134 views
How to troubleshoot soldering issue?
I have circuit working perfectly on a breadboard - motors are spinning as expected.
But same circuit with same components is not working when I soldered it - motors barely can spin (you hear buzz ...
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0answers
8 views
Installing the Arduino Uno driver? [migrated]
I recently bought an arduino uno and am following the instructions to install the drivers. The instructions say I need to find COM PORTS in DEVICE MANAGER in control panel but it's not there even when ...
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2answers
173 views
Arduino driver for lots of high power LEDs
This is my first Arduino/electronics project and I am a little bit confused about the components I need to handle huge amount of currents and the circuit.
I want to have full control of 32 (maybe 40) ...
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2answers
81 views
Battery Voltage Sensing Circuit (Voltage divider, buffer)
I've been trying to figure out a quick and easy circuit for sensing a battery's voltage, then translating that voltage to an 0-5v signal that could be read by a microcontroller like an Arduino.
My ...
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3answers
167 views
Simple low voltage disconnect circuit for Arduino
Preface:
Under impression to need a low voltage cut out, to prevent 2x AA NIMH rechargeable battery from being drained too now, and damaging them. (right??)
In deployment this circuit will commonly ...
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0answers
18 views
I2C 2 way communication between Arduino Uno and Arduino Mega [migrated]
if I remove the transmission code from slave this works properly but I need to transmit from slave.
Here is my master code
...
2
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1answer
101 views
Arduino Uno to ATtiny44A I2C communication
I tried to make I2C communication from Arduino Uno to ATtiny44A.
Uno as Master and Transmitter code:
...
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0answers
7 views
Arduino UNO rev 3 toggling 230v submersible pump on intervals [migrated]
I am software programmer and hobby farmer. While i was working on a hydroponic farming stuff, i had to use submersible pumps with timers. i dont want to buy timers that are actually tedious scheduling ...
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2answers
65 views
Making an Ammeter using Arduino Uno
As part of a hobbyist construction of an Arduino Uno voltmeter, I used a potential divider of 10K ohms and 470K ohms to step down the voltage to a level which the Arduino Uno analog pin can sense ...
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0answers
13 views
Arduino Ethernet Shield: May I connect it to a PC connected to the internet via wifi? [migrated]
I have an Arduino Ethernet shield.
May I connect it to a machine that´s connected wirelessly to the internet in order to get the arduino into the internet?
Or do I need to connect it only to a ...
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0answers
26 views
Can't configure ZigBee SZ05-ADV module with X-CTU and can't use XBee API in Arduino
I have few ZigBee modules to work with but these are not the contemporary digi modules. It has its own firmware installed and has their own terminal program to configure it their way. But every where ...
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1answer
62 views
Arduino PWM pin vs digital pin PWM simulation
Do I understand it correctly from this thread, Why do some pins have `~` signs next to their numbers?, that the PWM pins generate a square wave signal independently from what the code uploaded to the ...
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0answers
42 views
Confusion around LEDs on a breadboard [migrated]
I am just starting out with an Arduino Diecimila and am playing around with LEDs, and am confused by why some circuits result in an LED not lighting up.
Successful Scenarios:
Yellow LED from pin13 ...
2
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5answers
185 views
How is time of supplied real time clock module maintained without battery?
I am thinking about purchasing this RTC ( real time clock ) module.
Since this particular item comes supplied without a battery, I wonder how the time is being kept running in the chip since it's ...
3
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3answers
168 views
RGB & Proximity Sensor at about 6 feet
New to this site so hoping it's the right place to ask.
I'm trying to prototype something for use in a retail store and an idea a teammate had was using an RGB sensor to detect both ambient color as ...
3
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3answers
93 views
Can several CS pins be multiplexed with a shift register?
When sharing a SPI data line between several ICs and an Arduino, what exactly are the frequency constrains of the CS pin? Can I use a shift register to multiplex the CS pins (thus only requiring one ...
2
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2answers
86 views
Arduino LM35DZ giving incorrect voltage
I have an LM35DZ which is temperature sensor, properly connected and reading
strange values... like 1023.
I've tried almost any code I could find regarding LM35DZ and Arduino, with the same results ...
1
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1answer
33 views
Arduino TC1602 no display but backlight
I am using an Arduino Uno and TC1602 LCD display to write from MCU to the module. I have checked the wire connection for a lot of times, but still only backlight no text. So I am wondering whether ...
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0answers
26 views
Keyboardmessage on Arduino UNO [migrated]
Can an Arduino UNO and Arduino Leonardo do the same things?
Some of the examples in the Arduino software say to use Leonardo e.g. KeyboardMessage.
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1answer
38 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 ...
