Tagged Questions

0
votes
0answers
17 views

OneWire DS18B20 on mighty 1284p can't find my sensors, same sensors work w/ Duemilanove

I have uploaded the DS18x20 Temperature example sketch (unaltered, except I tried multiple pins for the I2C communication) to my proven Duemilanove and my ...
2
votes
2answers
129 views

Expanding Range Of Analog Values From Temperature Sensor

I'm trying to build a temperature controlled relay module with an ATtiny45 ( Arduino UNO R3 as ISP ) and a NXP KTY81-222 Temperature Sensor. The temperature range i want to monitor is 20°C to 30°C. ...
0
votes
1answer
70 views

Interference beetween ADC samples with XBee and photoresistor

I'm using an XBee serie 2 module for sampling the values of three sensors, a photoresistor (LDR) a moisture sensor and a temperature sensor (LM35). When there is no brightness the photoresistor has ...
0
votes
0answers
58 views

Arduino Compatible CO2 Sensor [closed]

I am looking for a relativity inexpensive CO2 sensor that will work easily with an Arduino. I have done some research and only found one real option, and it looks like some sort of an amplifier will ...
2
votes
2answers
133 views

The influence of a potentiometer on photo-diode bias

I have a sensor which I have connected to an Arduino via SerialPort to get data readings. There is a "screw potentiometer" (It's a screw that changes resistance which affects the output voltage). If ...
0
votes
1answer
241 views

Water level: BIG capacitive level sensor with steel bars?

So I want to measure water level under a bridge, or inside the city drain. Would it be possible to run two long (4 meter) metal probes, each one enclosed inside a PVC pipe, and placed one next to the ...
0
votes
2answers
147 views

I2C temp sensor and an Arduino wifi shield not working together

I am using an arduino wifi shield and a TMP102 with an arduino uno rev2. With boards older than rev3 you have to add a jumper from the 3.3V to the IOREF pin for the wifi shield, see here: ...
4
votes
2answers
65 views

Xbee to act as wireless i/o extension

I want to have an arduino with an xbee (call it xbee1) connected to it and another wireless xbee (call it xbee2) communicating with xbee1. Then I would have DIO1 on xbee2 acting as a digital input and ...
0
votes
0answers
42 views

Arduino sensors for x10

I am wiling to begin my ride in home automation. I realy want the Insteon ISY controller(that is x10 compatible) and some x10 2-way micromodules. But the project is realy complex and I need some ...
0
votes
2answers
603 views

Arduino controlled PWM PC Fan

I am looking at getting 2 Evercool EC8015HH12BP 80x10mm (4-wire) PWM fans. However, i am looking at controlling the fan speed with the arduino via the PWM pins. I found the following diagram that ...
5
votes
2answers
169 views

How to process voice commands using ATmega or Arduino?

For a project I need to start my PC using voice command. I thought to made up an voice controlled system to turn on my PC. As far as I know, when I press the turn on button-2 pin's on the motherboard ...
3
votes
3answers
120 views

Vibration Detection bronze keyed instrument

I want to be able to detect when a bronze key (Balinese Gamelan) gets struck by a mallet (hard wood) without effecting the keys vibration, so a piezo is likely out. Example of the instrument: Is ...
0
votes
1answer
124 views

Getting a incorrect voltage from a analog sensor

I'm trying to build a very simple thermometer using shift registers, 7-segment LEDs, and a LM35. The idea of the project is to learn more about shift registers and how to use them. What I've done so ...
0
votes
2answers
72 views

SR04 As only Transmitter and Receiver

I have taken up a "follow me" robot as my course project ,i am taking the following approach: Use one SR04 ultrasonic transducer only as transmitter which will be with me. Another SR04 module only ...
3
votes
4answers
195 views

Ideas on how to build a line sensor

I would like to detect a set of objects (width and height) as they pass through some sort of line sensor in a conveyor line. Something like this (transversal view): Not sure where to start... ...
1
vote
1answer
203 views

How many functions can I put into an arduino uno? [closed]

Is it realistic to put the following: GPS module, GSM module, SD card slot and about 4 analog sensors into Arduino uno? (have not yet goten an Arduino in my hands).
2
votes
1answer
208 views

Is it possible to program a hall-effect sensor with an Arduino?

On pg. 18 Figure 5 of this data sheet you will see a pulse train that allows for programming the sensitivity of the A1362 Hall-Effect sensor. So far I have tried to manually apply required voltage ...
4
votes
2answers
123 views

Ultrasonic sensor doesnt work inside case

I have a very strange error. My ultrasonic sensor, when both speakers are sticking out of my case, don't work at all. It's a black case. It gives very "near" readings". But it does work when outside. ...
1
vote
1answer
100 views

Ultrasonic Sensor URM37

I have just gotten a URM37 ultrasonic sensor. I need a way to measure the distance to an object from two sensors (for maneuvering). Can I know if ultrasonic sensors with 2 sensors are suppose to be ...
1
vote
3answers
326 views

Are there existing electronic sensors that can sense if underwater or not?

My goal is to to be able to read the water level percent in a small water tank. I was thinking wiring sensors going up the side that read whether they are currently touching water. My plan is to wire ...
4
votes
2answers
141 views

Practice hockey net

I want to build my son a practice hockey net. I am thinking of using a large chunk of plastic cut out in the shape of a net. I would like to have a force or pressure sensor in each of the four corners ...
0
votes
1answer
94 views

Soldering small connector to a wire

I am working on a hobby project which will have a eTape Liquid Level sensor connected to an Arduino controller. Since it is highly inconvenient to attach the sensor directly to the board, I'm trying ...
6
votes
1answer
210 views

Solar UV index radiation sensor?

I need to measure solar Ultra Violet radiation index. Is there any light sensor that would allow me to do this using an Arduino?
1
vote
2answers
455 views

Exists an Arduino compatible temperature sensor with effective range of approx 1 meter?

I saw this fictitious product on the web and was impressed: http://www.behance.net/gallery/Sprout-Infant-Monitor-System/4033245 However, as I said the product does not really exist, but the seed is ...
1
vote
1answer
389 views

How to read values from a NO2 sensor from an Arduino?

Alphasense sells this NO2 sensor: http://www.alphasense.com/environmental-sensors/alphasense_downloads.html http://www.alphasense.com/environmental-sensors/pdf/NO2B4.pdf How can I read the values ...
0
votes
2answers
230 views

Remote Temperature Sensor

I'd like to set up an arduino to remotelet monitor temperature using a wired sensor. Will wire length come in to play? For example, if I have 2 sensors 1 with a 10 ft run the other with a 30 foot ...
2
votes
2answers
192 views

Detect a touch to the threads

I have a lot of threads stretched vertically. I want to detect the touch them. So that you can then play them like a guitar for example). What is the easiest way to do it (detect touch, not to make a ...
3
votes
1answer
190 views

Problem with circuit created with fabric pressure sensor

This is only my second time working with any type of circuitry, so I apologize in advance if I don't use the right terms when I explain my problem. Feel free to correct me! So in one of my projects, ...
2
votes
1answer
2k views

Connecting multiple ultrasonic sensors to one Arduino

I'm trying to connect five ultrasonic sensors (HC-SR04, to be exact) to an Arduino board to detect obstacles in five directions (four cardinal + one Z-axis). I read the datasheet on the HC-SR04s and ...
1
vote
1answer
340 views

IR-Receiver signal almost constant

I have followed the tutorial from Makezine about an Infrared heart-beat sensor, and I have essentially used the same components listed on the video (that is, the same resistors and the same IR Emitter ...
1
vote
1answer
335 views

Arduino, GSM quadband module and gas sensor connection anyone?

I have an Arduino, a GSM quadband module and a gas sensor. I could only find connections of GSM to Arduino and gas sensor to Arduino. Anyone who can give me a connection diagram of three devices?
2
votes
1answer
176 views

Pressure/barometric sensor for coke can stirling engine

I'm working with a friend to provide instrumentation for a coke-can Stirling engine he's building (the kind you can see on Youtube). As part of this, we'd like to measure revolutions per second of ...
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 ...
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 ...
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 ...
2
votes
3answers
340 views

Microcontroller or arduino alternative for small cell-phone sized device?

I am doing a project in which I need to read RGB values from a color sensor TCS230 and send it to a microcontroller and use an linear equation to get glucose value from it and display it on an LCD.As ...
3
votes
1answer
3k views

How do I get gyro sensor data (L3G4200D) into degrees/sec?

I've been using a gyroscope sensor for an Arduino project. It's all hooked up and working but I have no idea what the units of the data it's giving me are in. I try to spin the board in my hand at ...
1
vote
2answers
4k views

How to connect load cell to arduino?

I got this 200KG Load Cell, it has 4 wires: Red: +EXC 12V Black: -EXC 0V Green: +IN White: -IN Sens. 2.000mV/V According to tech support I have on ...
2
votes
2answers
210 views

Which sensor nodes should I use?

I was asked to deploy a wireless sensor network and due to some requirements I already decided to use Zigbee/802.15.4 as my networking protocol. Also, I will be measuring air quality and taking some ...
1
vote
1answer
144 views

How to wire up the arduino kit

I had the SainSmart UNO+LCD Keypad+Prototype Shield+HC-SR04 Distance Sensor. Didn't buy them combo.I am somewhat new working with the Arduino kits and was hoping you could show me a guide of how the ...
1
vote
2answers
1k views

Temperature sensor (TMP36) inaccurate readings

I've got a TMP36 temperature sensor of which I'm trying to read the value of using an Arduino Uno. I know that the sensor has an accuracy of -/+ 2 degrees celsius but my readings are peak far past ...
3
votes
1answer
923 views

arduino and seven segment with two digit

I tried to make a sensing system using arduino UNO R3 with LM35 sensor and a display unit which is seven segment with two digits. I made all the connections as follow(I know it is Missy but I think ...
4
votes
1answer
125 views

Should I shield digital sensors in close proximity to one another? If so, how?

Hi and thanks for looking! Background I am building a RC multicopter, the design of which has already been helped along greatly by members of this community! Thank you. On the underside of the ...
2
votes
1answer
577 views

blend or flex sensors

i have to build a kind of dress that can unserstand the blend angles of neck, shoulder, elbow, wrist. i thought the best is to use arduino lillypad and some flex sensors. i've saw this: ...
2
votes
1answer
342 views

Strange data from arduino LDR sensor

I'm getting strange data from my LDR sensor. Without any significant changes in light is constantly goes from 0 to its max value 1023 and back. What could be the problem? Is it possible my LDR ...
0
votes
0answers
530 views

How to maximize capacitive touch/proximity sensitivity of MPR121+Arduino

I am using Sparkfun's MPR121 breakout board with an Arduino to sense proximity/touch to a number of electrodes. There are long (~10m) shielded wires running to the electrodes, which are aluminum tape ...
0
votes
1answer
438 views

TMP36 x Voltage input in arduino

I have a project, using a temperature sensor, TMP36 and Arduino. Basically its a bluetooth thermometer. Everything worked fine at breadboard and connected and energized by my notebook. Now I connected ...
1
vote
4answers
1k views

How to find out the voltage on Arduino ADC input?

I am a complete beginner in the field of electrical engineering. I have this temperature sensor with 2k Ohm resistance on 25°C. I have wired it parallel to a 3.6k Ohm resistor to lower the overall ...
1
vote
2answers
1k 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? ...
3
votes
4answers
2k 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 ...

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