Alex Eames is the founder, owner and main contributor to RasPi.TV more information about him can be found in his Google+ profile.

Nov 302015
Raspberry Pi Zero - Updated Pi Family Photo

With each new release of Raspberry Pi, I usually do a new family photo. It’s getting harder and harder to fit them all ‘on the sofa’ and get them all smiling. The way I’ve always done it is “all in one shot”. I may change this for future versions in order to get more definition. We’ll see. (As usual, more ideas than implementation time.) I am very happy for people to use this photo if they wish to do so provided the RasPi.TV credit stays intact. I make it available at 1500px resolution as CC-BY-SA. […more…]

Nov 272015
Raspberry Pi Zero - Power Measurements

Since the Pi Zero is small and eminently wearable, I thought I’d take some power measurements as this will be useful information for people to plan their projects. So I ran my usual series of tests and updated the table and chart showing all consumer models of Raspberry Pi. In my standard tests, I measure the current consumption, using the calibrated shunt on my Emeter, while the Pi is: Idling; Loading LXDE; Watching HD video and Shooting HD video. Since the Zero has no camera port, shooting video is not applicable, but all the other […more…]

Nov 262015
Raspberry Pi Zero FREE on the cover of this month's MagPi magazine.

Raspberry Pi Zero FREE on the cover of this month’s MagPi magazine. Yes you read that correctly. Raspberry Pi have pulled another world first out of the bag. Back in the pre-internet days when I used to buy PC magazines, they used to have a cover disk. Well Raspberry Pi have come up with a ‘cover computer’. It’s an absolutely awesome idea and is sure to cause ‘quite a stir*‘. Raspberry Pi Zero, a brand new spin of the Raspberry Pi, is designed to be as inexpensive as possible. A year ago the model A+ […more…]

Nov 182015
7 segment display Python Raspberry Pi - countdown ticker

Continuing with our theme of 7-segment displays driven directly from the Raspberry Pi’s GPIO using Python, I was asked for an explanation of the code from the previous post. In order to explain something, you first have to fully understand it, so I took some time to have a good look at the ‘business end’ of Bertwert’s code and figured out exactly how it works. I’ve now put a full code walkthrough of that script in the comments section of the previous post. Having done that, and having had a tweet from David Meiklejohn saying […more…]

Nov 162015
How to drive a 7 segment display directly on Raspberry Pi in Python

Last week I bought some 4-digit, 7-segment displays to experiment with. Strangely enough it was something I’d never tried before, so I was interested to see how they work. I googled around looking to see if someone else had done this before. It seems there are several different sorts of 7-segment displays, so you have to find a good match for the one you’ve bought. You can get them in various guises including: i2c backpack; 12 pins; 16 pins; resistors built-in; common anode; common cathode etc. The ones I bought are 12 pin, bare, no […more…]

Nov 132015
CamJam Edukit 3 Robotics Kit

CamJam Edukit 3 robotics kit is launched today. It’s an entry-level robotics kit aimed at beginners, but I’ve had quite a lot of fun with it, and haven’t even used all the bits yet. It’s been put together by Jamie Mann from the PiHut, and Mike Horne and Tim Richardson from CamJam. As with other CamJam Edukits, there is a progressive series of worksheets to help guide you through how to make the various pieces do what they’re designed for. You can find those here. Here’s what the kit looks like straight out of the […more…]

Oct 292015
RasPiO Duino Videos Complete

Last Thursday I decided I needed to do the “Analog Inputs Video” for RasPiO® Duino. All the other basic functionality was well covered in the previous assembly/setup/tutorial videos. There’s also the 47 page user guide (FREE Download – good intro to Arduino programming) and a GitHub repository with the example sketches in. But I wanted to complete the basic set of videos, so at midday I started planning. I filmed in the afternoon and cut the video in the evening. At about 2230 I was done, so I started uploading it to YouTube (~2.4 Gigabytes […more…]

Oct 222015
RasPiO GPIO Ruler goes on general sale

You may remember I ran a KickStarter campaign in August for the RasPiO® GPIO Ruler. The KickStarter rewards were all sent out in the first week of October. (We finished shipping 3 weeks early.) So now it’s time to launch the product officially and make it available to all on general sale. If you missed out on the KickStarter, now you can buy one. In case you haven’t seen it before, this is what it looks like… What Is The RasPiO® GPIO Ruler? It’s a coding crib-sheet for RPi.GPIO, a port ID guide, a multi-scale […more…]

Oct 152015
GPIO Zero Test Drive - Making Light of Security

Giving GPIO Zero (Beta version) a test drive might make you feel a little insecure, but I’m aiming to throw some light on the situation. I decided to try out some of the built-in features of GPIO Zero by working up a little hardware project. I looked at the current feature set and decided to try and combine MotionSensor, LED and LightSensor all at once. What sort of project uses that kind of technology? Why a PIR-controlled security light of course – if you swap the LED for a relay and 12V lamp! The video […more…]

Oct 122015
GPIO Zero - Introduction

If you’re a RasPi.TV regular, you’ll know that one of my very favourite things is hacking around with the GPIO ports on the Raspberry Pi and sharing my findings with the world. Sometimes this involves documenting a new feature, sometimes it involves making a new project, using a new chip or just getting something working that I haven’t tried before. But it nearly always involves Python programming and the brilliant RPi.GPIO Python library by Ben Croston. I’ve written all sorts of tutorials (~16) on RPi.GPIO because it is one of my favourite things. You may […more…]