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11 views

How do I create GPIO outputs from circuit to connect to Arduino Micro

how do i design the GPIO outputs so i can connect it to two pins on my Arduino and get the readings. ie. if green didoe is on GPIO 1 = High, other wise Low if red diode is on GPIO 2 = High, ...
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0answers
6 views

XBee Packet Buffer

I have an Xbee Pro Series 2. One is set as the coordinator and one as an end device. If I manually send a packet containing a one byte payload from the coordinator to the end device, I get an ...
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1answer
29 views

Arduino PWM control MOSFET

I have a bit of a problem that in hoping someone can shed some light on. I have a 4 wire fan (from a power mac g5) and I found that the pinout is positive, negative, PWM and rpm output. It's a bit ...
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0answers
16 views

Problem with testing an atomic clock module with Arduino

I have a FUM DCF-U module with the AFET 77.5 - 10x60/70 antenna of the company HKW. I connect it with my Arduino for testing purposes. It needs 3.3V VDD and it uses RS232 for the communication. For ...
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1answer
41 views

How to controlle a motor with arduino

I have 2 og those 12v motor and a 12v battery http://www.enigmaindustries.com/Motors/Bosch_EV_Warrior.htm I want to know what s the best solution to controle the motor with an arduino Uno. Is the ...
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1answer
179 views

Bluetooth Low Energy Proximity sensing less than 2 feet?

I am working on a project where I need a TX and RX to be able to sense if the modules are within 2 feet of one another. Ideally, we would like to only utilize BTLE 4.0 for both devices since power ...
0
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1answer
20 views

Current/Voltage sensing for wheelchair battery using arduino

I am working on a project that requires me to monitor the power consumption of wheelchairs across a spectrum of different activities. (electric wheelchairs batteries are 2x12V) To do that I am going ...
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0answers
22 views

Is it possible to use the DASH7 protocol in an arduino?

I've been reading about the protocol DASH7 but can't find much documentation about it. There seems to be a protocol stack called OpenTag writen in C and I want to know if there is something familiar ...
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0answers
27 views

arduino I2C maximum number of writes per Transmisson [migrated]

Is there any limit on the number of Wire.write() commands consecutively in between the Wire.beginTransmission() command and the Wire.endTransmission() command for the Arduino Wire library?
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0answers
21 views

Connecting a Random Ground Fixed the Circuit?

So I built an inverting Schmitt trigger with an op-amp with schematic shown below: The purpose of the circuit was to detect whether a mouse licks a feeding tube, and the feeding tube ended up being ...
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0answers
30 views

Creating a clock using Arduino [migrated]

I want to make a large clock, 16 inch x 7.5 inch, which will display dd Month yyyy. What would be the best way to do this? Does Arduino have a built in clock, and I'd just need logic to turn on/off ...
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1answer
103 views

Can I use arduino to feed this circuit instead of an external power source?

I am following this tutorial to connect the output from my guitar with arduino. I'm wondering: is it possible not to use the batteries, and to feed the circuit with the 5V output pin provided by ...
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1answer
101 views

problem of transmitting data from serial device to bluetooth on Arduino

I am using an accelerometer which uses serial communication on Arduino (UART), I wish to transmit the data to a bluetooth module (blusmirf gold) using I2C and finally read it from my android ...
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0answers
17 views

How can I make the Bluetooth work for Android and IOS systems? [on hold]

I'm working on a project with Arduino,and I'm connecting it with the smartphone through the Bluetooth,so what kind of Bluetooth should I use to make it pair with both Android and iphone devices ? or ...
0
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0answers
13 views

XBee Pro 900 RPSMA not detecting

I bought 2 XBee Pro 900 RPSMA from Sparkfun.One of them is detected by XCTU but same other one is not detected by XCTU. so I tried recover faultly one by seeing this video ...
0
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1answer
64 views

Stop timer set new value and start again AVR (Interrupt)

I have AVR MCU. I am playing with timer now. What I need ? I have timer counting up with some frequency. In each interrupt I am incrementing variable, and somewhere I need to check value of this ...
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1answer
56 views

Why is my SSD1306 OLED only displaying half of the screen area?

I am trying to get this display working with my arduino via i2c: http://www.buydisplay.com/default/0-49-inch-oled-display-module-64x32-pixel-ssd1306-i2c-white-on-black I have successfully initialized ...
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1answer
44 views

No internet in ethernet shield [on hold]

I am working on arduino uno R3 + ethernet shield to do a Home automation project. But due to proxy and authentication restrictions on my university network , arduino is not able to connnect to the ...
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0answers
20 views

GPS Module SKG13BL not working properly with Arduino Uno. How to resolve?

I am working with GPS Module SKG13BL and Arduino UNO. I have made 4 such sets. 3 of them are working fine. I am getting the latitude and the longitude correctly. The code in all of them is same with ...
2
votes
1answer
35 views

HC-SR04 ping sensor cutting out at ~3 meters

I have some HC-SR04 ultrasonic sensors that I purchased from eBay not long ago. I hooked one up to an Arduino and wrote a quick sketch to test them, and found that none of them work consistently. It ...
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3answers
8k views

Arduino Mega 2560 not detected when connected to USB port

I've just received Funduino Mega 2560. This is a Chinese product and should be the exact copy of Arduino. I am having problems connecting it to my computer and have spent several hours trying to ...
2
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2answers
10k views

Motor control with an Arduino Uno… Is it possible (and safe)?

I have an Arduino Uno and an inexpensive RC jeep with a functional DC motor and front-wheel turning servo, but I don't have an Ardumoto shield to control it (yet). I'd really like to learn if it's ...
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1answer
108 views

bipolar linear hall effect sensor choice

ANSWER: This is the best one I found for my purpose mouser.be/new/Texas-Instruments/ti-drv5053-hall-effect-sensor I'm doing a project where I use Hall effect sensor as a proximity meter. Using to ...
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1answer
255 views

HX711 amplifier

I have one of the HX711 ADC devices that I want to use for a weighing application. I've fitted it to a breadboard and used demo firmware to poll the chip for readings. The behaviour is as follows: The ...
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1answer
45 views

Why does my AY-3-8910 sound so distorted?

I'm building a circuit driven by an Arduino UNO that controls a AY-3-8910 programmable sound generator. The AY has three pins ...
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1answer
61 views

What knowledge and equipment do I need to build this device?

OK I am a Software Engineer dealing with both low level and C/C++/Java code with a Masters in Software Engineering but no knowledge of Electronic Engineering whatsoever. I wish to build a device that ...
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1answer
19 views

proximity probe (sensor ) / eddy current pre-conditioning circuit

my goal is to use Arduino with 2 proximity probe sensor to achieve some output like orbit plot for a shaft mounted on a bearing the system ...
0
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1answer
77 views

Arduino UNO not working with L293D

I am creating a simple robot that is controlled by an Arduino UNO, and given instructions by a button matrix. One can press 4 buttons for Forward, Backward, Left and right on on the matrix array, ...
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0answers
46 views

How can i trigger this watering timer manually

I have a automatic watering timer that I purchase from the internet. I'm attempting to hack it into something that I can either trigger from a micro-controller, or sense when the solenoid has been ...
1
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0answers
63 views

Voltage divider to measure battery voltage on Arduino [duplicate]

I am working on a 3V battery powered arduino project. I need to monitor the battery so that I could send a signal when battery is dying. At first it seemed tricky because the same voltage is being ...
1
vote
2answers
3k views

Broadcast in nRF24L01+

I'm able to establish a communication channel between two nRF24L01+. But once I kick in a second listener, only one of them gets the message. Funny enough, it's always the same that "wins" in the ...
0
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1answer
1k views

TinyGPS library doesn't update GPS data when using Arduino ADC

I have a problem where I am using TinyGPS library to get NMEA data from a GPS, while also sampling the ADC at the same time. The problem is that it reads the ADC fine, but it seems to execute the GPS ...
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1answer
80 views

how can we detect overspeeding through sensor or by building up circuit ??

I am working on project to detect overspeeding through sensor. but i am not getting any information regarding sensor. All i want to do, sensor inside vehicle with arduino and gsm which will send out ...
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4answers
34 views

How to convert 10K Pot raw output ADC data to voltage and resistance from arduino uno?

I have a simple and basic question. I am using Arduino uno to read the output from a 10K potentiometer. I understand that Uno uses a 10 bit ADC, therefore it can display outputs from 0 as 0V to 1024 ...
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0answers
29 views

How to read data from a rotary encoder with ATmega328 [migrated]

I'm using a home made "bare bones" Arduino, made with the ATmega328, and I need to read angle data from a geared DC drill motor, turning at speeds between 0 and 450 RPM. This is so I can use it as ...
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0answers
6 views

arduino OR operator [migrated]

I have been trying OR conditional operator in a if condition statement in my arduino programme and the result is not expected. My programme: //three variables assigned to const int datatype as ...
2
votes
1answer
108 views

Current, Voltage, and Power Sensing for 115 V AC Circuits

I am trying to sense voltage, current, and power with an Arduino (Due) for monitoring and diagnostic applications. To get reasonably good input (better than Kill-A-Watt), I have designed an AC sensing ...
0
votes
1answer
1k views

ATTiny85 to power two RGB LED strips [on hold]

Currently I am trying to control two RGB LED strips with an ATTiny85 microcontroller that I programmed with an Arduino Uno. The program I have basically fades the two LED strips between blue and ...
2
votes
1answer
70 views

Completing circuits with transistors and arduino

Hello and thanks to anyone who helps. I am trying to create a test bench for a control board we commonly work on at our business. One control board has 11 pins that a ribbon cable would be connected ...
8
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3answers
35k views

What is the voltage range of a standard headphone jack from a phone?

I want to connect the output from the audio jack of an iPhone to an Arduino. What voltage range can I expect to see on the audio lines from the iPhone? I assume that turning the volume up on the ...
1
vote
1answer
52 views

How should I wire up ground when using an ATX power supply to power an Arduino and several LED strips which in return are controlled by the Arduino?

Forgive me if this seems like a basic question but I want to make sure I wire these things up correctly. Currently, I have several LED strips that I am controlling with an Arduino and they are ...
0
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1answer
45 views

Arduino LED Cube 8x8x8 with a Led Driver (TLC5940NT )

Me and a group of friends need to make a college project and decided to do a LED cube that can graph mathematical functions. We do not know how to code very well, and are very new to Electrical ...
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2answers
162 views

Java/Arduino Controlled 120VAC Power Outlet

I'm working on a project with an end goal of controlling a power outlet with a Java program. Currently, I have the relay wired to outlets, a 3 prong 120 VAC plug, and my Arduino. Everything works as ...
1
vote
3answers
123 views

How to programatically simulate a click on a capacitance-sensitive button?

I am tearing apart a SONY HT-XT1, which has capacitive buttons to put it in a different case for a project: I've taken it apart already and am now met with a motherboard with 3 pads on it. Touch ...
0
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0answers
20 views

Can't burn arduino bootloader to atmega8a with usbasp [migrated]

I want to burn the arduino bootloader with arduino IDE, but I cant get it done. And here is my circuit: I have marked the way I connect the ISP port and the chip. I choose Arduino NG/older as the ...
0
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2answers
77 views

himidity sensor with more probes

Could you advice how to amend such schema in order to measure humidity on more probes? http://emesystems.com/images/smx/SMX555sc.gif The 555 is functioning as a resistance-to-frequency converter. A ...
0
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2answers
2k views

Using Arduino to program at89s51

I want to program at89s52, and on the internet there are many tutorials on how it is usually done, but almost all of them use the RS232 output from the computer, which I don't have. The only resource ...
1
vote
1answer
114 views

Basic Robotics Help. Variable motor speed control by ultrasonic sensor input on arduino

First, thank you for taking the time to read my post. I am attempting to use an ultrasonic sensor to control a DC motor using the PWM output of an arduino. Fairly simple, I know, but I'm just a ...
2
votes
2answers
14k views

How to connect multiple i2c-interface devices into a single pin A4 (SDA) and A5 (SCL) on Arduino?

I want to add a real time clock module into my little project. I want to display both time and date on my existing i2c 2x16 LCD module. Both i2c-interface real time clock module and 2x16 LCD module ...
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2answers
51 views

Arduino analog interrupt LDR

I am using an LDR on an Arduino Pro Mini with an analog interrupt. The Arduino goes to deep sleep when there is no light or it's not busy: Sleepy::powerDown(); ...