Alfred's musings

Next up, following from the Homopolar motor , is the banana clicker. This is a great way to impress your audience at any presentation, so I'll now need to find another trick... but I'll share this with you for your pleasure... just don't tell anyone until you've used this to impress your next audience. Instead of using a fancy clicker to advance your slides, use your banana. How? In short: buy this  (or one of these ), plug it in, connect banana and impress. In a bit more detail (and cheaper set-up): An Arduino has a USB plug, and can pretend to be a computer USB keyboard if it is running this program . (You could buy or build your own Arduino, and just download the open source code...) The code effectively looks for conductivity between connectors, and when it measures conductivity, it sends the "key press". A banana conducts (providing you hold on to the other (ground) wire... or you can hook it up to ideally a steel lectern). Other fruit wor

I've recently presented some fun bits at a Google Event (#GoogleATU), and I had so many requests for more info, that I decided I'll write up my tricks for all to enjoy. if (( technology == magic ) && (magician's code))   return (void);           // nah, ignore First up: Homopolar motor . It's not my idea, I have to confess. It was Farraday's idea and he first did this demo in 1821. What do you need: 1) A battery. Round ones work best. Just take a normal AA battery, one that you won't mind throwing away, as you'll pull a lot of current through it. Expert tip: For best results, find one where one of the poles on the battery is not perfectly flat. You ideally want it to be a bit rounded or with a slight tip on it to reduce the friction with the screw 2) A screw. Expert tip: This could be a nail or anything else really, but it needs to a) conduct electricity and b) magnetic field. You want one that is as heavy as your magnet can hold. Too

It's no secret that I'm Arduino crazy. And I've got (and need) a few. One I bought from Farnell  for about £17. Then I learnt how I could build my own on a bread board , and then I just finished a soldered version on protoboard yesterday. The DIY route is cheaper... and the components probably cost me about £10, plus several hours of labour. But the cheapest and best option, was this Indiegogo "$9 Arduino" . It's my first experience of putting my own, real money in some crowd-funded project, and the results are stunning: On 26 July, I paid $22 for two Arduinos, and the promised delivery date was 20 September. The campaigned got 14x the backing planned (target $12k, actual $164 401), yes delivered on time, and increased the value to me (because of the greater backing received) by adding more goodies for free. And the kit works as expected, so I'm super impressed. This certainly would not have happened without a really dedicated project manager

I'm running a class on Arduino at Google for Googlers... and this came in very handy today in remembering which pins are which... printed to Avery 7x2 labels. End result looks something like this:

Summary: Atmega328p is the brains of an Arduino and could be used on it's own. 1) (Once only) Burn bootloader 2) Program is by plugging into your Arduino Uno board 3) move to breadboard by just providing power and an external clock. Have your favourite blink program running for £3. Detail: I'm hooked on Arduino. It allows me to have a touch pad (made of foil) to toggle my LED strips in my house on and off, to have a laser trip-wire in my front garden, control my heating and provide a cool flickering-fire effect night light to my kids... but with only one Arduino board, I can only do one of these at a time. First, I got excited about Arduino at <£20. But many times <£20 is still a lot. Then I got excited about the <$10 Arduino , and ordered a few (due for delivery very soon, I'm told). And then, thanks to a Google-run electronics course, I discovered what many others know already. You can have all the benefits of a micro controller without an Arduino..

One of the things that energize me most, is to deliver a compelling and memorable presentation to a large audience. When Amit Singh (Google, President: Enterprise) recently referred to these Forbes tips , I thought it's worth forwarding them, as I think they serve as a great reminder how to deliver a great speech. (This picture was taken at Aalborg, Denmark. I can recall the moment... pausing... and having the audience attentively wait in anticipation. What fun!) And it also reminded me of some of my worst speeches. Many moons ago (and when I still had no grey hair) I delivered a keynote at a Gartner Symposium on Collaboration, where I woefully misunderstood the brief, and prepared a sales pitch instead of an industry analysis. And to make matters worse: As I realised I'm going down, tried to redeem my poor judgement with some lousy humour. Oh dear! Right - let me get back to prep from my presentation later this week in Madrid!

I've just had the fantastic opportunity to meet with two young and very talented people that friends at Telegraph is coaching. I just love coaching people: It's such a rewarding experience to help someone develop! And hats off to teachers who do that day in and day out (when paperwork and red tape allows). Thanks for your time today, Jennifer and Ross!