For questions dealing with devices that measure the physical world around us and translate it into signals for the Raspberry Pi.

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1
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0answers
18 views

pyvisa connection [on hold]

I was hoping to use my RPi to read a sensor output, then (used as slave) to send the read values to a PC. I've been told that it could be done by using the pyVisa library in the master PC but I cannot ...
1
vote
1answer
20 views

Issues with multiple SDA sensors

I am facing some issues trying to connect two sensors which make use of the SDA GPIO. Ultra sound sensor HC-SR04 Gyroscope & Accelerometer MPU-6050 Separately, they work just fine, however ...
2
votes
1answer
34 views

Sensor minimum/maximum operating voltage

I've bought this sensor, and I'd like to connect it to Raspberry Pi (unless I manage i2c on dagu minidriver). The spec on the sensor say: Minimum operating voltage: 2.5 V Maximum operating ...
2
votes
1answer
115 views

How to connect a 12V fan sensor wire to the Pi

I have a 3-wire 12v DC fan (Sanyo Denki 9S1212M4011). It's actually getting 15V because my "12V" wall wart isn't accurate. When the fan is not running my multimeter tells me there is 14V on the ...
1
vote
2answers
75 views

Starting raspberry pi from button

I want to have a raspberry pi inside a hollowed out book with a contact switch that detects the book cover lifting, which will then send a signal to the pi to turn itself on/wake from a low power ...
0
votes
1answer
78 views

Maximum number of Sensors supported by raspberry pi [closed]

i would like to know how many sensors can be connected to raspberry pi at a time (i would like to connect sensors like temperature sensor,humidity sensor,pir motion sensor and 3 to 4 leds)
0
votes
1answer
13 views

Headers to connect xtrinsic sensor board

I have both (pi and board) as illustrated here. However, both boards have pins. Neither have the female ends for the connection. What kind of headers do i need? Are there female - female available? I ...
2
votes
2answers
170 views

Sensor to detect water/liquid level

I have a swamp cooler that does not turn off automatically when the water level evaporates below the safe level, and if I fail to turn it off even once I could damage it. The sensor simply needs to ...
1
vote
1answer
317 views

How many ultrasonic sensor can a Raspberry pi B+ can handle?

im planning to build a simple robot. having several ultrasonic sentor and 12 servo motor. How many ultrasonic sensor can a Raspberry pi B+ can handle? i need 8 ultrasonic working at the same time ...
0
votes
2answers
154 views

Control sensor: SainSmart TGS-2600

I've purchased a SainSmart TGS2600 Air Contaminants Sensor, but got no data sheet or the like. Does anybody know how to connect this breakout to the Pi?
0
votes
0answers
104 views

Camera doesn't work with GPIO PIR Sensor

I am using a 3 pin PIR Sensor to detect motion (https://www.modmypi.com/pir-motion-sensor). This is connected to the GPIO pins. I also have the RPI Camera module attached to the Camera CSI. I would ...
0
votes
0answers
112 views

Sensor DS18B20 - i2C - weird response

I'm using the raspberry pi (model B) with the DS18B20 to read temperature. I connected 9 sensors through the 1wire (port 4), however I'm having a few sensors with a weird problem. The sensors ...
0
votes
1answer
107 views

Does the kernel support a BMP180 BMP85 digital pressure sensor out of the box?

The kernel generates a virtual file with the values for the famous temperature sensor DS 18B20. Is there a plug and play kernel support for the I2C digital pressure sensors BMP180 and BMP85 too? ...
0
votes
0answers
32 views

tsl235 and the RPi

I'm trying to get the tsl235 (https://www.sparkfun.com/products/9768) working with the PI and the bcm2835 library (or without it, just using a simpler mmio) and while the operation of the tsl235 ...
0
votes
1answer
58 views

Can a 74LVC8T245 be used for 5v inputs all by itself?

I got this kit that came with a 74LVC8T245 (http://www.wvshare.com/product/74LVC8T245-Board.htm) that I have been able to get 5v output working just fine but as for a 5v input sensor I'm not 100% sure ...
3
votes
1answer
185 views

Multimeter functionality for raspberry pi

Are there any sensors that would allow me to measure voltage/current/resistance similar to using a multimeter but would allow me to interface with them through a library? (for example, measuring ...
0
votes
0answers
62 views

cheapest presence sensor for a dor

I have a big wardrobe in a dark room, I put leds inside and I want to light them up when the door (sliding door) opens. Whats the cheapest and more robust way to detect door opening, with less damage ...
0
votes
1answer
115 views

One Wire Temperature auto setup while booting

I have temperature sensor (DS18B20), also known as a 'one-wire sensor'. I've connected it to pin 4. I am using this code that someone wrote (source). #!/usr/bin/env python import time ...
1
vote
2answers
335 views

IndexError DS18B20 Temperature sensor

I have this temperature sensor (DS18B20). I've followed the tutorial on Adafruit (here). First I had to setup some modules by doing: sudo modprobe w1-gpio sudo modprobe w1-therm Then I check the ...
-3
votes
1answer
31 views

How to set ID for multiple sensor like LED, Temperature Sensor and etc?

Sorry to disturb you guys, I would like know how to set a custom ID to sensor like LED, Temperature Sensor and etc. Example: Like 1 LED sensor, not smart LED. Only can display real time data and ...
0
votes
3answers
116 views

Connecting multiple light sensors to one port

Is it possible to connect multiple light sensors to one port and similiarly control multiple motors through one port only? (I've tried searching for answers on Google, couldn't find a convincing ...
1
vote
1answer
29 views

Mesure weight using force [closed]

Is it possible to use this force-sensitive resistor to measure weight between 10g-5kg(0,4oz-176oz)?
0
votes
1answer
1k views

Connecting a bluetooth module to GPIO?

I got a bluetooth sensor from this Chinese company. Model is BC417. The module has six pins: KEY RXD TXD 5.0 3.3 GND I'm totally newbie about GPIO and sensors, only got that module and a few ...
0
votes
1answer
293 views

How to send multiple sensor data from arduino to the raspberry pi, and from there to google docs

I want to build a arduino- based weather station, now I want to know how I can send sensor data from the arduino uno to the raspberry pi and from there to a spreadsheet in gdocs. My problem is, that I ...
2
votes
2answers
92 views

How to develop for Mikroe's click boards with free software only?

Hardware offer for the Raspberry Pi When looking for sensors, actuators etc, that are easy to use, one can spot that a Raspberry can host a Pi click shield - extension board for Raspberry PiĀ® with ...
1
vote
1answer
73 views

May I connect directly to GPIO headers without stripboard

I wish to install a thermo and a humidity sensor on my Raspi but I have no place for a stripboard or veroboard in my waterproofcase. So I would like to know whether I can connect them directly on the ...
0
votes
1answer
228 views

Use Arduino library on raspberry

I am not sure whether this is a stupid question or not, but you may be able to help. I bought a sensor board and the manufacturer provides an Arduino-library to use the sensor. Is there a way for me ...
1
vote
1answer
101 views

Real-Time Computaion! Processing Speed Problem!

I am pretty new to the c++ and raspberry pi. I am trying to run a real time sensor motor control with the help of Raspberry pi, using cpp. I am sniffing the sensor data through Ethernet and sending ...
2
votes
2answers
238 views

Graphic output sensor data

I have some experience with Arduino but never used Raspberry Pi. I'm looking for the best way to show my sensors data via RPi. What I would want to do is: Arduino to read sensor data and send it to ...
1
vote
1answer
157 views

Using FSR with Raspberry Pi

I am trying to get values from a force sensitive resistor with Raspberry Pi. I saw an example using Arduino such as this http://learn.adafruit.com/force-sensitive-resistor-fsr/using-an-fsr and I can ...
1
vote
0answers
261 views

Using 5 volts on an mcp3008

I have a couple different types of hall effect sensors I would like to test out using an mcp3008 ADC to interface with my pi. The sensors run on 4.5v minimum. Before I configure the ADC for 5 volts I ...
0
votes
1answer
175 views

Analog to Digital converter

Can I connect a ADC0804LCN to a raspberry pi ? http://pdf1.alldatasheet.com/datasheet-pdf/view/77309/INTERSIL/ADC0804LCN.html
1
vote
0answers
323 views

How to use photoelectronic sensor (keyence PZ2-42) with raspberry pi

Please help meee..I want to use the photoelectronic with the raspberry pi for a micromouse maze Using sensors to detect the presence of micromouse at specific locations .I was given all this from my ...
1
vote
1answer
188 views

Connecting an etape using spi

I have an etape liquid level sensor http://www.adafruit.com/datasheets/eTape%20Datasheet%2012110215TC-12_040213.pdf hooked up to my raspberry pi model b through an MCP3008. The MCP3008 is connected ...
1
vote
1answer
100 views

How you would build a Robot with a raspberry Brain? [closed]

I think about building a Robot with the raspberry as the Control Unit. Anybody of you done that already? The question is about Which hardware can controlled by the raspberry? How you would solve the ...
2
votes
3answers
179 views

Connecting multiple ds18b20 to different GPIO ports

There are loads of examples of using the ds18b20 temp probe, or even multiples all to GPIO #4, and then running: modprobe w1-gpio modprobe w1-therm cat /sys/bus/w1/devices/28-*/w1_slave The issue I ...
3
votes
4answers
221 views

System for determining occupied seats

I need an app that can do live monitoring of whether each seat in an auditorium is occupied, so visitors can load the app and see where to sit. The auditorium has a relatively flat ceiling 4m ...
1
vote
1answer
52 views

IR detector lamp, digital monitoring

I just bought this IR-detector+lamp device: http://www.biltema.se/sv/Bygg/Belysning-och-lampor/Arbetslampa/Halogenstralkastare-med-IR-detektor-46191/ It turns the light on for a certain time when ...
3
votes
4answers
954 views

Looking for a pi-compatible thermometer for brewing

I would like to use my Raspberry Pi to monitor my fermentation temperature. I would like a thermometer I can attach to the side of the carboy and wire up to the Raspberry from a few feet away. For ...
1
vote
1answer
265 views

Having trouble reading (MQ 4) sensor digital value

I've a MQ 4 (smoke etc) sensor module, as listed here. It has these inputs/outputs: VCC = +5V DOUT = digital out AOUT = analogue out GND When I connect it to a voltmeter it outputs (DOUT) 3.1V ...
2
votes
1answer
1k views

Do I have to connect a resistor to my DHT22 humidity sensor?

I've just bought a DHT22 sensor to connect to my RPi but most tutorials mention there should be a resistor connected between the sensor and the GPIO pin. Is this necessary? Will it work without or ...
2
votes
1answer
415 views

How can I convert an optical mouse into an optical flow sensor?

I'm working on a rover.I'm using it with Raspberry Pi as my microprocessor.And can anyone tell me that whether i need an encoder with it.
1
vote
0answers
95 views

Anyone who encountered this error while building the SensorKinect from source?

Anyone who encountered this error while building the SensorKinect from source? The source was downloaded from https://github.com/avin2/SensorKinect. The guide that I'm following was this: ...
1
vote
2answers
1k views

How to connect 20 DS18B20 temperature sensors to RPi?

RPi is working fine with 10 1-wire temperature sensors, but I need to connect 20.
0
votes
2answers
401 views

Best source for raspberry pi sensors and accesories [closed]

this is a bit of a vague question but I have been building my own pi robot and am just getting to the stage where I wish to start adding some sensing capability however I am not an experienced techie ...
1
vote
0answers
191 views

USB Temp/hum sensor for Pi help [closed]

Im currently in the middle of making my pi read data from a humidity and temperature sensor. My plan is to: Connect a sensor to my pi which will read humidity and temp A perl script will then be ...
2
votes
3answers
1k views

Raspberry Pi and BMP085 (I²C)

I tried to get the temperature and pressure with the BMP085 sensor and my Raspberry Pi (256MB) via I2C. I used this Adafruit tutorial: Using the BMP085 with Raspberry Pi, but this isn't working for ...
2
votes
1answer
454 views

Sensor via USB to PI

I have a temperature/humidity sensor that connects via USB to a PC. There is a program that reads it and displays the data. Is there an easy way to get the Pi to read this data and get it into an Open ...
4
votes
5answers
12k views

Multiple temperature sensors with a Raspberry Pi

I have seen plenty of examples for using one temperature sensor with the Raspberry Pi, however, how can I multiplex 5-6 temperature sensors to a Raspberry Pi? I want to read the temperature from ...
1
vote
1answer
665 views

Using a 12 bit ADC with raspberry pi

I have a LM35 sensor connected to my Pi using the MCP3204(12bit ADC). To read the values I found a python wrapper for the Spi protocol called py-spidev. I am following tutorials which uses use the ...