Questions tagged [sensors]

Use this tag for questions about selecting, connecting, using, and debugging sensors.

Filter by
Sorted by
Tagged with
2
votes
1answer
794 views

Analog angle conversion from +70° to -70°

I am using below sensor (accelerometer) .My application is a solar tracker, where I wanted to convert the sensor output into +70° to -70° format. My question is how can I convert the angle? #define ...
0
votes
1answer
426 views

Arduino gets stuck: battery powered, wireless, dc motor drive

I have a Arduino Mega 2560 connected to L293D Motor Driver IC connected to two small size dc motors. MPU-9150 using i2c Xbee v1.1 arduino shield by seeed Li-po battery, 7.4 volts, 2200 mah. All ...
0
votes
2answers
548 views

Read car high temperature exhaust pressure sensor

Is it possible to read the exhaust gas pressure of a turbo car with an Arduino, and then control an electric motor based on the pressure?
3
votes
2answers
1k views

What sensor would detect the black stripe on an analog electricity meter?

I have an analog electricity meter (AEM) and I would like to track my usage of electricity. I've attempted to use the EE-SY310 photo sensor, but that's not sensitive enough it seems. I suspect the ...
5
votes
3answers
6k views

Binary serial transmission order of data

I'm implementing a filter for my IMU Sensor and thus I want close to real time data visualized on the computer. I use binary serial communication to facilitate the sending part for the arduino (as far ...
2
votes
1answer
391 views

Input a signal from a sensor to an Arduino Due

I'm working with Arduino Due and I have a sensor that outputs a square signal with voltages in the range of 0-5V. In the Due specs there is a warning that says: "Warning: Unlike other Arduino ...
2
votes
1answer
2k views

Trouble with variable types and integrating DHT11 temperature sensor

I am trying to modify this sketch; https://github.com/itsallvoodoo/home_automation/blob/master/Arduino_HVAC_Controller/HVAC_Controller/HVAC_Controller.ino But I have a different temperature sensor, a ...
3
votes
4answers
9k views

SRF04 Ultrasonic sensor - inaccurate readings

I have an Arduino Uno linked up to an SRF04 ultrasonic sensor. I'm using the library from here: https://code.google.com/p/srf04-library/ I'm then using the basic script "Centimeter" that comes in the ...
1
vote
2answers
3k views

Reading the rpm of multiple fans

I am trying to build a fan controller for my pc, the problem is that the example code(http://playground.arduino.cc/Main/ReadingRPM) im using utilizes interrupts. On my uno I can then only read the rpm ...
-1
votes
1answer
2k views

what is the coversion details of temperature usnig lm35?

I found similar type of code in many sites for coverting analog signal lm35 to centigrade. But i can't understand that fully. So I need some help what this equation means tempC = (5.0 * tempC * 100.0)...
2
votes
1answer
3k views

Operating HB100 backpack with Arduino Due

I need to connect a speed sensor module with an Arduino Due and calculate the speed of an approaching object. the sensor is: http://www.limpkin.fr/index.php?post/2013/08/09/Making-the-electronics-for-...
0
votes
3answers
3k views

Reading a car mass air flow, volumetric air flow meter

I'm looking to build an air flow meter that will output in standard liters per minute. The cheapest sensors seems to be a car's Mass Air Flow sensor. I'm wondering if there is a way use one of these ...
0
votes
1answer
432 views

Are there any pressure sensor for 22 kg (~50lbs) and more?

I'm looking for pressure sensors up to 22 kg and more. So far the highest capacity I could found was 25 lbs. Do higher ones not exist?
0
votes
2answers
2k views

Problems controlling servos using proximity sensor

I've just started using Arduino and I need to make a code to simulate the behavior of a lizard, meaning that if you come close to it, it moves away from you. I'm using a "Arduino duemilanove" that my ...
8
votes
4answers
33k views

What is the work of pulseIn?

I have code for an ultrasonic sensor which I found from a site. Here is the code: #define trigPin 12 #define echoPin 13 void setup() { Serial.begin (9600); pinMode(trigPin, OUTPUT); pinMode(...
5
votes
4answers
19k views

How to connect more than 10 sensors to Arduino uno r3

How I can connect more than 10 sensors to Arduino Uno R3? I calculated it and I can connect just 4 fire flame sensors (sensors which can find a fire (a candle, for example)) and maybe 1 ultrasonic ...
11
votes
4answers
255 views

How do I know if a board fits my requirements?

I'm new to Arduino and I saw on their website that there are many different kinds of boards. What are the differences, or to be more specific, how would I know which board meets my requirements? I ...
7
votes
1answer
3k views

Why does increasing resistance make a capacitive sensor more sensitive?

From the Capacitive Sensor Page on the Arduino website, it states the following: The capacitiveSensor method toggles a microcontroller send pin to a new state and then waits for the receive pin to ...
2
votes
1answer
718 views

Reading CMPS10 raw values

I've got a cmps10 compass module hooked up to my arduino due through a logic level converter. I am writing code to convert the raw magnetometer readings into a bearing that I can use but have run into ...
2
votes
1answer
306 views

Animated LED Strip & Sensing an Object

Problem: Have an LED strip do some animation (say it takes 15 seconds for that line of code to run) meanwhile, have a sensor (tried methods: PIR sensor and ultrasonic sensor) watching to see if an ...
6
votes
2answers
518 views

Why is that any sensor signal need to be hooked up to the interrupt pins on Andruino boards?

I have come across some Andruino Sensors like Motion, Light and all recommend to be connected to pin 2 or 3 on Andruino Uno board which are interrupt pins. This is especially true if you are looking ...
1
vote
1answer
1k views

Calculating location with 4 piezo's

i've got the following problem i'd like to get solved and i'm breaking my head, so please help! I have a rectangle with the following size 40 cm * 50 cm. On each corner of this rectangle I placed a ...
2
votes
2answers
615 views

Is it possible to transmit Longitude and Latitude via RF433MHz?

I want to make a drone project, and to that I will use arduino as the platform. My plane is to use a Play Station controller to control the Drone in the air. In addition to that I want to connect a ...
1
vote
1answer
352 views

Larger NFC antenna? [closed]

Goal: I would like to be able to transfer some information to an Arduino Uno board via an NFC shield/antenna. The situation requires that the NFC tag may potentially hit anywhere within a circular ...
4
votes
6answers
13k views

Detect and stream if a chair is occupied

I am planning to build a device able to detect and tell a server via Wi-Fi if a chair is occupied. How would you do it? And how cheap do you think the device could be?
2
votes
2answers
10k views

A waterproof Chlorine Sensor

Does anyone know where I can find a Chlorine Sensor to use with the Arduino? It would need to be water proof. I've googled, but I couldn't find anything. EDIT Requirements: relatively inexpensive (...
5
votes
4answers
3k views

CO2 sensor for arduino

I want to add CO2 measuring feature to my room weather station. Can someone please recommend a CO2 sensor easy to integrate with Arduino?
2
votes
1answer
17k views

How do I use 2 ultrasonic sensors to control a 5v motor?

I've hooked up two ultrasonic sensors to my breadboard and I also got a 5v motor installed. I also got the diode installed and the usual set up. I can easily control the motor with one sensor. But ...
5
votes
2answers
2k views

Calibrating Accelerometer Sensor

I'm working with an Adafruit LSM303DLHC Accelerometer Sensor hooked up to an Arduino. I've downloaded the appropriate libraries to make it work and uploaded the example sketch "accelsensor.pde". I ...
3
votes
1answer
234 views

Can anyone explain how to use MPL sensor with Arduino MEGA?

I am trying to connect a MPL3115A2 Altitude/Pressure/Temp Sensor Breakout which I bought from Hobbytronics to my Arduino Mega. What I had in mind was (Breakout -> Arduino): 3.3V -> 3.3 V GND -> ...
9
votes
3answers
3k views

How to measure total energy usage of an arduino board

I have a project that I'm currently working on. We have built a green wall, wich consists of plants on a wall Now, we have a pump situated at the bottom that waters all the plants. There is an ...
4
votes
1answer
1k views

Ultrasonic Sensor scanning too often resulting in a whirring noise

I am using an HC-SRO4 ultrasonic sensor for a wall-avoidance, maze-solving robot. However, I have recently run into an issue where I am getting a whirring noise from the sensor because it is taking ...
1
vote
2answers
827 views

Opamp for amplifying 1V signal voltage to 2V

I'm doing my first electronics project where a signal that varies between -1 to 1 V is going into an analog pin on the Arduino. The amplified signal has to be read as fast as possible by Arduino. The ...
5
votes
1answer
6k views

Pressure transducer / sensor (0.5 - 4.5V) innacurate analog pin readings

I have a relatively cheap 0-15psi pressure transducer. It has 3 pins - ground 5V and signal. The signal outputs a voltage of 0.5V to 4.5V based on pressure from 0psi to 15psi. I can verify it does ...
8
votes
2answers
7k views

Reading a varying voltage into Arduino

Using an Arduino Nano and a current transformer (CT), I'm trying to sense the current flowing through a 120 V 60 Hz line. Circuit CT outputs 0-1 V according to its specifications....
5
votes
1answer
14k views

How to connect 5V sensors to 3.3V digital input (Due)?

I'm completely new with Arduino and microcontrollers in general. I have several 5V sensors, and need 3.3V because that's the max for the Due. Is it possible to use a resistor to connect it to the ...
10
votes
5answers
20k views

My DS18B20 is reading high. How can I get it to return the correct temperature?

I am working on a heating control system for my home, but having problems with the temperature sensor reading higher than I expect. I have a 5V Arduino Mini Pro clone hooked up to a relay module, an ...
2
votes
3answers
642 views

XBee shield communication

I need to communicate between two Arduinos using XBee. I am new to XBee and hardware. The two Arduino Unos need to send a message (number) to each other and light an LED or play a sound, when they ...
7
votes
3answers
2k views

Using more than one Ping Ultrasonic Range Finder

I have done various applications with the Ultrasonic example project but it is always using one pinger. I'd like to make a scanner resting on a servo sweep but to reduce sweep time use more than one ...
3
votes
3answers
401 views

How does the Space Replay record audio?

The Space Replay A hovering object that explores and manipulates transitional public spaces with particular acoustic properties. By constantly recording and replaying these ambient sounds, ...
9
votes
2answers
13k views

How can I sense very high temperatures with Arduino?

I've seen many temperature sensors, but the highest temperature they go up to is 125 degrees C (257 degrees F). I want to reach higher temperatures than that. I'm thinking about rigging up a closed ...
8
votes
3answers
12k views

Grove sensors without a Grove shield

There exists a large variety of sensors in the Grove System. Usually these are accessed via a special shield (Grove base shield). Can I access these sensor directly without a shield. In particular I ...
15
votes
1answer
9k views

How can I sense when someone is sleeping with my Arduino?

Ignore the stalker-like title. I am thinking about creating a project with Arduino that can sense you sleep habits, when you're asleep, and how much you sleep. It would be convenient to not have to ...
48
votes
17answers
13k views

How to trigger an alarm when toilet paper is low?

Anyone with kids knows they never help with the toilet paper. Anyone know how to track when it's low or out and sound an audible alarm? I just don't know what sensor to use that may help. Some that ...
1
vote
1answer
208 views

Arduino + IMU vs ArduIMU

I am working on a UAV and we are currently exploring inertial measurement units or IMUs. The two options that we have come across are: Using an Arduino Uno and a 9 DOF IMU like this one Using an ...
13
votes
10answers
16k views

Sensor for underground water tank level

In a similar way to the question "best way to determine if a 5 gallon water jug is getting empty", I'm looking for a way to measure water in a container. This is so it can be connected to an Arduino ...
9
votes
8answers
6k views

Best way to determine if a 5 gallon water jug is getting empty

I have an espresso machine that gets its water from one of those 5 gallon blue water bottles (I would plumb it, but our water here is WAAAAY too hard). If I ever accidentally let the bottle run out ...
0
votes
1answer
2k views

Extracting data from Arduino MultiWii Flight Controller

I am new to the world of Arduinos but have a new project going with a MultiWii Flight controller. With the MultiWii comes a software for showing all data that is measured from the sensors (...
5
votes
3answers
2k views

Serial sensors and the Yun

I am involved in a project that is going to measure PH and chlorine in a swimming pool. The plan is to use a Arduino Yun. The sensors we are going to use are connected using serial. Since we may be ...
2
votes
1answer
2k views

Using the Waspmote Sensor Board

Spanish company Libelium makes this pretty impressive sensor board: http://www.libelium.com/products/waspmote/sensors/ for their Waspmote series of boards. These are not meant for Arduino ...