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by 0x0000
Sun Aug 14, 2016 12:25 pm
Forum: Networking and servers
Topic: assigning IP addresses to Sensors
Replies: 3
Views: 1003

assigning IP addresses to Sensors

Hello, I am going to start to work on a projct where I will be using Raspberry pi to create a Sensor network. But the problem is, I want to assign the ip addresses to each of the Sensor that I am using as in "Internet of Things". I have looked through the internet to look for the ip based sensors bu...
by 0x0000
Fri Feb 14, 2014 2:37 pm
Forum: Advanced users
Topic: PyAudio module, Getting error running the default example pr
Replies: 1
Views: 1305

Re: PyAudio module, Getting error running the default exampl

Have you read this ?

http://raspberrypirecipes.blogspot.com/ ... ernal.html

also, try reducing the sampling size in the code.
by 0x0000
Mon Jan 27, 2014 2:32 pm
Forum: Advanced users
Topic: Research Paper on my Raspberry Pi Project
Replies: 1
Views: 3245

Research Paper on my Raspberry Pi Project

Hello, I have recently used Raspberry Pi to develop a Black Box (one in aircrafts). Concisely, The Raspberry Pi performs data logging of various sensors and eventually encrypt all the data using Advance Encryption Standard 256-bit. I didn't use any Crypto libraries to write the Algorithm, in fact, i...
by 0x0000
Sun Jan 26, 2014 7:07 pm
Forum: Other projects
Topic: Project purely Software based ? Need Ideas.
Replies: 3
Views: 1134

Project purely Software based ? Need Ideas.

Greetings everyone, I am exceptional with algorithm development skills and have very good Programming skills as well, I recently have developed this project using Raspberry Pi. http://www.raspberrypi.org/phpBB3/viewtopic.php?f=41&t=67283&p=491917#p491917 The reason I am writing this post is, I am al...
by 0x0000
Wed Jan 22, 2014 10:17 am
Forum: Other projects
Topic: Raspberry Pi based AirCraft's BlackBox (My Project)
Replies: 0
Views: 1837

Raspberry Pi based AirCraft's BlackBox (My Project)

1526375_1443261555892102_1333850791_n.jpg We have developed this as our University Project. More Photos: http://goo.gl/hSeBTe http://goo.gl/kmk72B http://goo.gl/tN2DJU Raspberry Pi based Air Craft's Black Box prototype, Details and Working, Just like an actual Black Box, ours is capable of Physical...
by 0x0000
Sun Jan 19, 2014 4:45 pm
Forum: Beginners
Topic: Understanding Cron Jobs in Raspberry Pi
Replies: 9
Views: 2557

Understanding Cron Jobs in Raspberry Pi

According to the structure of Crob Job, Minute | Hour | Day of month | Month | Day of week | Command to execute For example, to run script every hour: 0 * * * * script Shouldn't it be * 1 * * * * script ? For every 10 minutes, 0/10 * * * * script How come 0/10 equals to 10 minutes? Shouldn't it be 1...
by 0x0000
Sun Jan 19, 2014 4:39 pm
Forum: Beginners
Topic: Bash script file is not being executed at startup
Replies: 10
Views: 1672

Re: Bash script file is not being executed at startup

redhawk wrote:Forget using crontab just put your script call inside /etc/rc.local and it should run just before the login screen.

Richard S.
Would it work to execute bash file ?
by 0x0000
Sat Jan 18, 2014 7:26 pm
Forum: Beginners
Topic: Bash script file is not being executed at startup
Replies: 10
Views: 1672

Re: Bash script file is not being executed at startup

redhawk wrote:Forget using crontab just put your script call inside /etc/rc.local and it should run just before the login screen.

Richard S.
Please elaborate ?
and what if i want to run after every 15 minutes ? should i still avoid Cron ?
by 0x0000
Sat Jan 18, 2014 7:03 pm
Forum: Beginners
Topic: Bash script file is not being executed at startup
Replies: 10
Views: 1672

Bash script file is not being executed at startup

Hello, I wanted to execute the script at start-up so i followed the tutorial found somewhere on the internet. It said to edit your crontab -e and add the following line, @reboot python "file link" & Since my file is a bash file (.sh), so i did this, @reboot bash /home/pi/Desktop/script.sh but it did...
by 0x0000
Sat Jan 18, 2014 6:54 pm
Forum: Beginners
Topic: How GPIO produces 5V and > 700mA current to turn on RPi
Replies: 7
Views: 1712

Re: How GPIO produces 5V and > 700mA current to turn on RPi

I know it is not good to Power Pi directly from USB Port of a Laptop, but Adafruit suggests to use this cable to Power Raspberry Pi, http://learn.adafruit.com/adafruits-raspberry-pi-lesson-5-using-a-console-cable/overview The great advantage of connecting this way is that it can even supply the powe...
by 0x0000
Sat Jan 18, 2014 9:51 am
Forum: Beginners
Topic: Raspberry Pi Cobbler issue, which GPIO is which
Replies: 4
Views: 1767

Raspberry Pi Cobbler issue, which GPIO is which

Hello,

This GPIO cobbler is a mess,

have a look,
http://s11.postimg.org/ld5vbxgrn/Untitled.png
Image

I want to know , which pin is equal to which GPIO in this cobbler.

for example, what is p0, p1, p2, p4 ...p7 equivalent in GPIOs ?
by 0x0000
Fri Jan 17, 2014 8:37 am
Forum: Beginners
Topic: How GPIO produces 5V and > 700mA current to turn on RPi
Replies: 7
Views: 1712

How GPIO produces 5V and > 700mA current to turn on RPi

Hello, Instead of using a Power Adapter, we can use Raspberry Pi GPIO and a serial cable to power the Raspberry Pi through Laptop USB Port. But When we direct connect the Power port of the Raspberry Pi to Laptop USB port it doesn't provide sufficient power. How come the USB port of Laptop provides e...
by 0x0000
Thu Jan 16, 2014 5:46 pm
Forum: Advanced users
Topic: RPi consumed 25mins for 5secs voice encryption using AES256
Replies: 8
Views: 2714

RPi consumed 25mins for 5secs voice encryption using AES256

I do not understand why it took Raspberry Pi too much time for the encryption of Audio data... have a look, https://www.facebook.com/photo.php?fbid=1441981839353407&set=a.1381210918763833.1073741826.1381195155432076&type=1&theater It took around 25 minutes for Raspberry Pi model B to encrypt 5 secon...
by 0x0000
Tue Jan 14, 2014 9:44 pm
Forum: Advanced users
Topic: ADC Pi chip, how to read the output
Replies: 10
Views: 4905

Re: ADC Pi chip, how to read the output

Yes I have the Rev 1 board but i never found its Schematic and Datasheet. and Yes, I have followed your tutorial to connect the ADC Pi A schematic and datasheet for the ADC Pi Rev 1 certainly used to be available, shame it isn't any more :( Maybe you could email ABelectronics to ask for a copy? htt...
by 0x0000
Tue Jan 14, 2014 12:41 pm
Forum: Advanced users
Topic: Delta Sigma ADC in ADC Pi, how it converts Analog to Digital
Replies: 2
Views: 1186

Re: Delta Sigma ADC in ADC Pi, how it converts Analog to Dig

Did you look at https://github.com/abelectronicsuk/deltasigmapi :?: And https://www.google.co.uk/search?q=delta+sigma+adc seems to contain quite a bit of info... :roll: ;) I tried that actually, but i couldn't find any basic conversion example which i why i posted it here. Hopefully, someone would ...
by 0x0000
Mon Jan 13, 2014 4:48 pm
Forum: Advanced users
Topic: ADC Pi chip, how to read the output
Replies: 10
Views: 4905

Re: ADC Pi chip, how to read the output

Here is the schematic, http://www.abelectronics.co.uk/docs/stock/raspberrypi/adcpi2/schematic.pdf‎ That's the schematic for the Rev 2.1 ADC Pi, but you said you have the Rev 1 ADC Pi? The I2C pins on the ADC Pi board are simply a 5V-level version of the I2C bus on the Pi (which uses 3.3V-levels). A...
by 0x0000
Mon Jan 13, 2014 9:32 am
Forum: Advanced users
Topic: Delta Sigma ADC in ADC Pi, how it converts Analog to Digital
Replies: 2
Views: 1186

Delta Sigma ADC in ADC Pi, how it converts Analog to Digital

I am studying for ADC Pi, for my Presentation. it uses MCP3424 Chips that uses Delta Sigma ADC. I know how Successive Approximation ADC Works (on paper). But how Delta-Sigma ADC Performs the calculation from Analog to Digital. For instance, If the input Analog voltage is 5volts and the reference vol...
by 0x0000
Sun Jan 12, 2014 7:10 pm
Forum: Advanced users
Topic: ADC Pi chip, how to read the output
Replies: 10
Views: 4905

Re: ADC Pi chip, how to read the output

Richard-TX wrote:I cannot seem to find a schematic of the board you bought.

Do you have a link to it?

Once I have that info. I should be able to tell you how to read from it .
Here is the schematic,

http://www.abelectronics.co.uk/docs/sto ... matic.pdf‎
by 0x0000
Sun Jan 12, 2014 7:04 pm
Forum: Advanced users
Topic: ADC Pi chip, how to read the output
Replies: 10
Views: 4905

Re: ADC Pi chip, how to read the output

I think I found it. It appears that the board has two mcp3424 chips on it. As a result and I2cdetect -y 1 should show devices at 0x34 or 0x68 The data sheet is at http://ww1.microchip.com/downloads/en/DeviceDoc/22088b.pdf AB Electronics has a demo script at http://www.abelectronics.co.uk/adcpidatal...
by 0x0000
Sun Jan 12, 2014 1:30 pm
Forum: Advanced users
Topic: ADC Pi chip, how to read the output
Replies: 10
Views: 4905

ADC Pi chip, how to read the output

Hello, I have recently bought this ADC Pi (Rev 1) http://www.briandorey.com/docs/adcpi-launch/adcpi.jpg it has Pins A1 to A8. These must be the Analog inputs. The other pins are 5v, GND, SDA and SCL. What is the purpose of SDA and SCL pins here. ? I know what i2c buses are but the Pi already has i2c...
by 0x0000
Sat Jan 11, 2014 1:27 pm
Forum: Automation, sensing and robotics
Topic: DS18b20 too hot
Replies: 6
Views: 5441

Re: DS18b20 too hot

Hey. I have some problems with my temperature sensor. It gets really hot after dome seconds when booting, ans i Think I have wired everything right. My plan is to wire ground(black) from sensor to GND, power(red) to 3.3v (3v3) and data(yellow) to cpio 4(p7). + 4.7 ohm resistor between data and powe...
by 0x0000
Sat Jan 11, 2014 1:04 pm
Forum: Automation, sensing and robotics
Topic: How the Calibration works in the sensor
Replies: 1
Views: 1258

How the Calibration works in the sensor

I have just bought MQ5 Gas Sensor module for Arduino to use with RPi, (http://www.dhgate.com/product/100-pcs-lot-gas-sensor-module-mq-5-lpg-natural/133345721.html) http://i.stack.imgur.com/coSA0.jpg According to the Data sheet, "Resistance value of MQ-5 is difference to various kinds and various con...
by 0x0000
Thu Jan 09, 2014 1:45 pm
Forum: Python
Topic: Help understanding this PyAudio example Program
Replies: 1
Views: 1345

Help understanding this PyAudio example Program

Hello, I am having trouble understanding this example program for audio recording , it comes with PyAudio module and i couldn't be able to get it, Here is the code, import pyaudio import wave import sys CHUNK = 1024 FORMAT = pyaudio.paInt16 CHANNELS = 2 RATE = 44100 RECORD_SECONDS = 5 WAVE_OUTPUT_FI...
by 0x0000
Mon Jan 06, 2014 3:16 pm
Forum: Python
Topic: Audio Encryption using PyCrypto
Replies: 0
Views: 560

Audio Encryption using PyCrypto

I have implemented the complete AES-256 manually in Raspberry Pi to encrypt text data. Audio Files however requires proper sampling before encryption, Therefore i have decided to use Built-in PyCrypto libraries to perform the task. I, however, wants to know if there is any Example code available for...
by 0x0000
Mon Jan 06, 2014 2:31 pm
Forum: Troubleshooting
Topic: Pi is getting too Hot and not turning on now
Replies: 6
Views: 1088

Re: Pi is getting too Hot and not turning on now

RaTTuS wrote:?? where is here ?
Pakistan, i meant.

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