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15 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
7 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 ...
0
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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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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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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
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 ...
-3
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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 ...
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0answers
14 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 ...
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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 ...
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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 ...
1
vote
1answer
57 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 ...
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 ...
1
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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 ...
-2
votes
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
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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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 ...
0
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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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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 ...
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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 ...
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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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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 ...
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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 ...
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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(); ...
0
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1answer
40 views

Solar Panel Charging with Arduino

I built a solar panel charge controller from instructables with an easy to read schematic and for some reason my battery charges up to a certain point and then loses charge again. That leads me to ask ...
0
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0answers
58 views

What kind of equipment would be required to detect lobsters entering a pot? [on hold]

I'm investigating creating a device to detect if (and ideally how many, although this seems much more difficult) there are lobsters in a trap. The trap would be between 20-100 feet of saltwater, and ...
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
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1answer
69 views

For a 'customized' arduino consuming less energy making use of Attiny85 vs PCB Fabrication?

Currently I am working on a prototype project where I try to move a servo (6V) according to the level of light that is recognized by a photodiode making use of the ISR function. A torch light is used ...
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2answers
66 views

Logic Level Converter only works reliably when multimeter attached

I have this logic level converter that only lets data flow when my multimeter is set to measure milliamps and the leads are placed across the high and low signal pins. On the low side I have an ...
0
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2answers
53 views

Alternatives to Arduino for controlling LED's and Audio files? [closed]

Simple Alternatives to Arduino Has anyone used these different boards? If so, what did you use them for and why? Which are appropriate for controlling LED's and playing audio files? I'm looking ...
1
vote
1answer
64 views

Eagle software: Different grounds in the same circuit

I'm designing an Arduino shield to manage the control signal that reaches 4 CCFL inverters. As part of the circuit design, I've decided to use optocouplers to isolate the Arduino's microcontroller ...
1
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3answers
75 views

Measure human voice for ambient noise level

I need to develop an ambient noise level to measure the loduness in an office. Sometimes during the day people raise their voice more than they should and a lot of confusion is created. So this device ...
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0answers
10 views

BLE mini read not working

I recently brought a ble mini and configured it correctly updated my firmware. I am using asus zenfone 5 and android version 4.4.2. I am trying to use the simple chat program. I am able to send data ...
-1
votes
0answers
22 views

H Bridge speed control

So I'm trying to modify the speed of a motor through use of an arduino and a H Bridge, but adding different ohm resistors to the lie between the external power and pin 8 of the bridge just doesn't ...
2
votes
2answers
68 views

Best way to sync LED's to light NES figures on a wall clock?

Advice & Ideas needed... Working on a project - a custom wall clock with perler bead NES sprites in the place of the numbers. The figures are mounted to a wood board with cutouts underneath, and ...
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3answers
491 views

Functionality of Accelerometers

Is it possible to do a speedo meter with an accelerometer ? I am working with Arduino hardware.
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0answers
23 views

SPI: problems communicating with sensor using Arduino [migrated]

I have a sensor which I am trying to communicate with over SPI using an Arduino UNO. It is my first time using SPI and I'm experiencing some problems which I'm hoping are just due to some ...
0
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0answers
24 views

Sending data from web app to arduino powered virtual doorman [on hold]

I do not know much about electronics but am looking to learn more. I have a small project I have completed a good portion of that I now need some electronic expertise to determine if what I am trying ...
0
votes
1answer
56 views

HM10 Bluetooth (CC2541) put in to sleep while connected to iOS application

I'm trying to trigger an action on iOS application using HM10 Bluetooth module. And i have successfully accomplished the functionality, But now my concern is the power consumption, I have already ...
0
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0answers
45 views

How can I interface a Raspberry Pi with a bare Atmega128

Currently in this project, I have an Arduino Uno controlling some low-level hardware, which interfaces to software running on a Raspberry Pi via the Arduino USB cable. I'm looking to shrink the ...
0
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0answers
35 views

Arduino AD-converter tolerance [migrated]

I created a quite simple Arduino sketch: ...
-1
votes
0answers
32 views

3.7 V battery in arduino micro

How do I connect a 3.7V battery into the arduino micro? I want to make a power supply for a circuit that is using a arduino micro. I have: a sensor neopixel arduino micro battery 3.7V And my ...
0
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1answer
50 views

variable or field ' …' declared void

I'm working on an ADC ATSAM3x8e arduino due board. I'm trying to write new .h and .cpp files. How do I create a datatype like ...
0
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0answers
33 views

connection between two ARDUINO with xbee [migrated]

I have a setup where two XBEES modules are talking to each other, both using XBEE shields, one attached to an UNO ARDUINO and the other a MEGA ARDUINO. One XBEE sends the data and the other receives ...
0
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0answers
49 views

How to control 2 servos at same time in sync? [migrated]

For overcoming torque issues, I have attached 2 identical servos on a certain part of my robot arm and because I saw someone do the same. Now, while writing code I realize: ...
0
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0answers
22 views

Adding U.FL connector to XBee

I recently bought two XBee Series 2 Pros, and I want to increase the range on them. I found an appropriate 2.4GHz antenna with a U.FL connector. I already have one XBee with a U.FL connector and from ...