Jan 282015
 
Hacking HDMIPi Power Switch with Feedback

In a recent post, I showed you how to hack the HDMIPi power switch so that you can turn the screen on and off from the Pi. But no sooner had I done that than my friend Peter Onion, wondering if there was a way to detect if the LCD is on or off in case it gets “out of sync”, tweeted this… @RasPiTV Is there a switched 3v3 supply to the LCD pannel ? Wire that to a GPIO input pin ? Or can you test monitor "on" via hdmi ? — Peter Onion […more…]

Jan 232015
 
Raspberry Pi Family Photo Update - The Red B+ and 256 Mb Rev 2 B

Back in November 2014 I wrote about the various production revisions of Raspberry Pi. I also published a “family photo” of the 10 different kinds of Pi I then owned. Since then, I’ve been given a 256 Mb Rev 2 model B by George Dowds of ThePiZone (thank you George) and I bought myself a red B+ from AliExpress. So now there are 12 Pi in the family photo, I thought it was worth a reshoot. If you fancy a closer look, you can click the below image for a higher resolution version. I set […more…]

Jan 142015
 
Hacking HDMIPi Power Switch

The HDMIPi driver board is a fairly complex design. I didn’t design it, although I did have some input into the feature list. I don’t fully understand how it works (something to do with the magic white smoke in the chips, I think), but I have messed around with it probably as much as anyone. Recently, several people have been asking if we can switch HDMIPi on and off programmatically from the Pi. Göran Roseen wants to be able to do it with this HDMIPi based clock… @Raspberry_Pi wall clock with go-to-school indicator that goes […more…]

Jan 052015
 
Documentation and Commenting Your Code

From observation of the computer industry going back to 1987, when I did a pre-university year at IBM Scientific Centre in Winchester, it seems that the very brightest and best programmers (software creatives) are often not very good at or not very keen on documenting their work. I think the reason for this is often misunderstood. Poor documentation is a source of great consternation in the world of Linux. In fact it’s a large part of the raison d’être for RasPi.TV. We, the users, often feel that the geniuses who write awesome software can’t be […more…]

Dec 112014
 
Swag from PiWars CamJam

I’m always a bit blown away by how nice people in the Raspberry Pi Community are. At PiWars last Saturday I was given no less than 5 presents. I quite often give away a few beta samples of potential products at CamJam, and this time was no exception. But I ended up receiving some stuff too, which was really nice. Three of the items were accessories that people had made for their HDMIPi. I’ll show you those three first… DIY corrugated cardboard HDMIPi stand + cheeky screwdriver from Andrew Scheller HDMIPuck Tim Richardson Button Covers […more…]

Dec 082014
 
CamJam PiWars

On Saturday was the first PiWars competition at Cambridge Raspberry Jam (#CamJam). It was an excellent event. I was one of the judges, which proved to be quite difficult, but a lot of fun. The whole day went very well, there were several competition events… Sumo – Robots trying to push each other beyond the boundary Obstacle course – negotiate a range of different obstacles, some of which were positively evil Speed test (straight line) Line following – following a twisty, turny course Golf – try to direct the ball into the hole as efficiently […more…]

Dec 062014
 
CamJam Edukit 2 Launches at PiWars

Today the CamJam Edukit 2 is being launched at the first Cambridge Raspberry Jam PiWars event. I’ll be judging the smallest robot and the best non-competing robot categories at PiWars, but today’s blog is about the kit. This is the second kit in the series, which adds some sensors (temperature, light and PIR) into the bundle. The full kit contents is shown and described below. What’s in the Kit? A 400 point bread board including dual power rails Immersable DS18B20 temperature sensor Light Dependent Resistor (LDR) Passive InfraRed (PIR) sensor Piezo buzzer 4 male-male blue […more…]

Nov 282014
 
The FLIRC case for Raspberry Pi B+

FLIRC have made a new enclosure for the Raspberry Pi B+, which is going on sale today. The Pi Hut is importing these to the UK and is the sole distributor for UK and EU. Priced at £13 including VAT, it’s an attractive case made of cast aluminium (painted). It has an integral heat-sink, and comes with a thermal pad you can use to ensure good thermal transfer. It weighs 95g. This is what it looks like… It seems to be targeted at media centre Pi owners, which is not surprising given what FLIRC is. […more…]

Nov 262014
 
Gert VGA 666 review and video

Aaron Shaw from Pi-Supply sent me one of his early Gert VGA 666 adaptors for testing and comment, so I thought I’d share my findings. I followed the diagram in Gert’s manual. It’s a fairly simple build, just 20 resistors and two connectors. It took about 20 minutes, being careful to get all the resistors in the right places. The hardest part was the stacking header. The final product will ship with a slightly shorter stacking header. This should be a bit easier to solder. To get it working on the Pi, you need to […more…]

Nov 212014
 
Raspberry Pi A+ Cases

In the 11 days since the Raspberry Pi A+ was launched, a few different case options have materialised. Here is a little video walkthrough of the options so far… Naked Pi – no case at all Altoids tin – yes the A+ actually fits in one (see the video) Cyntech/ModMyPi case – this is a B+ case, but the A+ fits in it too, albeit with plenty of room to spare A+ Pibow Royale Coupé – Pibow specially designed for the A+ 3d printed cases Mike Redrobe’s @RasPiTV @RPiSpy @climberhunt I just made a minimal […more…]