Raspberry Alpha Omega is looking into the possibility of using a Freescale Freedom development board from Farnell to take analog samples at 800,000 baud. Read more here.
Turn a #RaspberryPi into an audio spying device
Masumi Zapater over at NIGEKA has done an interesting tutorial on turning the Raspberry Pi into an audio bug! Using a USB microphone and standard Linux audio tools, he has worked out how to record and stream the audio to a client computer. Not sure exactly how small a device can be when you add the USB and a battery pack, but it’s a bit of fun anyway! Read the tutorial here. The comments section contains information on capturing to MP3 which will come in useful when storage capacity is tight.
Speech Recognition with the #RaspberryPi
Someone has written a step-by-step guide to getting speech recognition working on the Raspberry Pi. It’s just a barebones tutorial but it does give you enough to get going if this is the kind of thing you want to do. Read more here. There is another tutorial using a different method here.
How to: Raspberry Pi Webcam Server Stream | Techspect
Techspect has posted a great how to for turning a Raspberry Pi into a streaming webcam server.
#RaspberryPi as a low-power NAS
Good tutorial on How-To Geek about how to turn a Raspberry Pi into a low-power network storage device using Samba and NTFS. Quite disappointing response to comments, though, as there are lots of questions without answers… Read the article here
The RaspberryPi Tricorder – the Picorder
This project has been in progress since I first received my Raspberry Pi last July. Until now, I just haven’t had the time to record video.
The Picorder is a Pi/Arduino combination taking readings from 2 temperature sensors, a hall-effect magnetism sensor and an ultrasonic distance sensor which it then displays, with the aid of a Python script, on an LCD display. The Pi also displays it’s own IP address(es) which can come in useful sometimes!
Here is a list of components:
- Raspberry Pi Model B 512MB (although it would likely run on a 256MB)
- Dreamer Nano v4 (Arduino Leonardo clone from dfrobot.com)
- PiPlate prototyping board
- Edimax wifi dongle
- TMP102 temperature sensor
- SR-04 Ultrasonic distance sensor
- Light-resistant resistor
- MCP9700 active thermistor
- AL1302EUA-T Hall effect sensor
- A HD44780-type LCD
- Stripboard
The scripts for the Picorder are held on my GitHub redwing-pi repository. The main driver Python script is pipodcorder4.py.
This project is also detailed on my project page at Ryan Walmsley’s Pideas.co.uk site, which is a fantastic place to add your own Pi project.
Here’s a photograph of the Picorder:
For a walkthrough of the components watch the following video:
See the device in action below:
I will be posting more technical details of the inner workings, code and such like, in the next week, so keep an eye on the blog using the RSS feed or subscribe via email at the top of the screen.
All the articles about, or related to, the Picorder are available here.