Nov 052012

Download Python Gertboard Programs ocol – Open Collector – Darlington Array Relay Driver I’ve managed to get the open collector ocol program written in Python. The ocol program drives the Darlington Array on the Gertboard. This can be used to switch up to 6 relays, each on a separate GPIO port. I’ve managed to write versions for both wiringpi for python ( and RPi.GPIO ( They are both included in the download link, which will always contain the most up to date versions. Here’s a comparison video of Gert’s ocol program running first, then my […more…]

Nov 022012

Download Python Gertboard Programs I’ve been having a go at producing Python 2.7 versions of some of the Gertboard test suite. It’s partly as a learning experience for me and one which I hope will help others too. Which GPIO? Why not both? There’s two different ways to handle GPIO (General Purpose Input Output) in Python at the moment… Ben Croston’s RPi.GPIO Gordon Henderson’s WiringPi (Python Wrapper by Gadgetoid) The ultimate aim is to have versions of the Python programs using both systems. As a file naming convention, we’ll take the name from the original […more…]

Oct 222012

I recently bought a 2 terabyte Goflex Home network drive to run as a media server and file server on our local home network. So I figured I’d see how to connect it to the Pi. After searching around various forums, I found a solution that worked. Over the weekend, someone on the Raspberry Pi forums asked how to do this, and so a new “How To” was born. Pre-requisites for Hooking up goflex drive the drive is already installed on your home network it’s fully up and running You have a userid and password […more…]

Oct 182012
Getting an inexpensive 16x2 LCD screen working on the raspberry pi

I finally freed up one of my breadboards. I got my semi-permanent temperature sensing interface fully up and running with the Pi Cobbler – logging to COSM. So now I could take the components off my other breadboard and free up the Gertboard for other experiments. LCD Next The next thing I wanted to get working was a 16 x 2 LCD panel. (£6 from Tandy) Having seen other people get these working, I figured it couldn’t be all that hard and it wasn’t too bad actually. But I did make one small mistake along […more…]

Oct 152012
How to fix a broken SD card slot on your raspberry pi

You would Pi too if it happened to you :( Just as I was finishing up my last blog post, the review of Adafruit Pi Cobbler, my foot snagged on a network cable and hoiked my Pi onto the floor. It landed on the SD card and the feeble card slot took no prisoners. The card slot broke as it was predestined to do, the moment anyone looked at it harshly or in the wrong tone of voice. This Pi, my friend since 15th May 2012, is accustomed to living in a beautiful Yoctopuce case, […more…]

Oct 122012
Adafruit Pi Cobbler Review

Most of my recent posts have been focussed around the Gertboard. Not surprisingly, since not many are out there yet. Now that Farnell Element 14 has started shipping (I got mine today), we should expect to see a proliferation of info about clever things people have done with theirs. One thing Gertboard has done for me though, is kindled an interest in interfacing. Previously I posted about temperature sensors and logging. Since developing the temperature data logging capability, I now want to keep that going, but still be able to mess around with the Gertboard. […more…]

Oct 082012
Using Temperature Sensors with Gertboard and the Raspberry Pi TMP36 and LM335z

I spent much of last week’s “Pi time” wrestling to get temperature sensors working through the Atmega on the Gertboard. It was quite time consuming, but I managed to find some great helpful web sites and glean a bit of info from each. Once I’d got two different types of sensors calibrated, installed and working (and a third type temporarily abandoned), I started fooling around with logging the temperature readings. As things do, it evolved roughly like this… View the temperature data on the screen updating every second Make the temparature data stop scrolling and […more…]

Oct 032012

This video is about Ken Thompson’s work on TBOplayer. (KenT on the Raspberry Pi forums, KenT2 on Github – where you can download his work.) Ken’s written a GUI (graphical user interface) for Omxplayer – the only video player currently available which can utilise the full capabilities of the Raspberry Pi’s GPU. (Graphics Processing Unit). The reason he did this was for a museum display, where they want to play four different videos which are to be user-selectable by pressing buttons. Ken needed to complete the project for £500 or under. And the Raspberry Pi […more…]

Oct 022012

BerryIO by Daniel Bull. As demonstrated to me at the Milton Keynes Raspberry Jam Sept 30th 2012. Apologies for the high background noise level. This was shot live at the event, so we couldn’t ask everyone else to shut up or we’d have been lynched. ;) If you want a closer look, you can download Berryio from here In a nutshell, it’s a web browser based IO control system for the Raspberry Pi.

Oct 012012
Raspberry Jam at Milton Keynes - National Museum of Computing - Gertboard Demo Rig

Yesterday I went to my first Raspberry Jam – a get-together of Raspberry Pi enthusiasts. This one was in Milton Keynes at the National Museum of Computing. It happened to be run by Peter Onion, who I already knew from the world of aeromodelling. So it was a no-brainer for me to go to… meet an old friend (he’s not that old) visit a museum of computers get to talk to people about the Raspberry Pi and Gertboard and demonstrate them see what other people are doing with the Pi (nobody else had a Gertboard […more…]