Mar 172017
Make an LED Arrow Sign with RasPiO InsPiRing

One of the interesting usage possibilities for the RasPiO InsPiRing system is illuminated signage. What could be better than flashy, blinky, multi-coloured signage? Well, not much really? So I decided to make an arrow out of two straight 8s and a triangle. I used white depron foam as a base, ordinary headers and jumper wires to connect all the shapes to each other and to the controller. Then a needle and thread and some hot glue to fasten the shapes to the depron. I then darkened the foam with a marker pen. This is what […more…]

Mar 102017
How to make an internet clock with NTP, Pi Zero W and RasPiO InsPiRing

I’ve been messing about with the Pi Zero W and one of my RasPiO InsPiRing boards to make a colourful clock that keeps accurate time using NTP (Network Time Protocol). Because the Zero W has WiFi onboard, it’s perfect for things like this. It’s quite a visual thing, so I made a video about it… Here’s the Code If you want a walk-through of the code, I made a little walk-through video of it, but decided to keep that separate because not everybody would want that level of detail. You can find that after the […more…]

Jan 262017
Wireless Remote Sensing with Wemos D1 mini, Arduino IDE, Raspberry Pi and lighttpd web server

For a long time now I’ve wanted wireless temperature sensors scattered around the house and garden reporting their temperatures regularly to a central server. It’s not something I really need, but something nice to have. I’d originally planned to do it with a RasPiO Duino or Arduino nano and inexpensive NRF24L01 radio boards. Albert @winkleink Hickey, a friend of mine, who also runs the Egham Jam put me onto these when he did his buttonflash game. Albert has a useful hobby of trawling ebay for bargain-basement electronics. A few weeks ago he showed me the […more…]

Nov 112016
Extending Python Vocab Tester With Dictionary Lookups and Storage

In my previous blog post, I showed you my Python based vocabulary tester and suggested some ways it could be “taken further”. You probably won’t be overly surprised to hear that I have taken it a bit further myself. Actually, I’ve taken it rather a LOT further, but this blog article is to show you the next couple of steps. Let’s Compile a List The first, fairly easy, tweak I made was to store the words I don’t know in a file. I figured it would be good to make a list of these so […more…]

Oct 132016
How to Estimate Your Vocabulary Using a Python Script and the Scrabble Word List

The other day I read an article on the BBC website which suggested a method to estimate your vocabulary. Essentially, you sample 20 pages of your dictionary and note down how many words you know on each page. Then you add up the total, divide by 20, then multiply this by the number of pages in your dictionary. This gives you an estimate of your vocabulary. (Results will depend on the number of words in the dictionary, so use the largest you have.) This seemed like a good idea, so I tried it. I used […more…]

May 242016
RasPiO Analog Zero - an 8-channel zero-sized board for Raspberry Pi

Exciting news today. I’ve just launched a new KickStarter project for a Pi Zero sized analog board. I’ve called it the RasPiO Analog Zero. It works with GPIO Zero and is very easy to use. Here’s what it looks like… …and here’s the KickStarter video showing some of the things you could use it for… If you like the look of it, please come and back us on KickStarter.

Feb 032016
Using MCP3008 to measure temperature with GPIO Zero and RasPiO Pro Hat

In the previous article I showed you the GPIO Zero Experimenter’s Kit I put together to go with the RasPiO® Pro Hat. Today I’m going to give a quick overview of how to use the MCP3008 analogue to digital converter to read the TMP-36 temperature sensor. This gives us a temperature reading (in °C) that we can use to make “decisions” in our Python program. In our case, we’re going to switch on a red LED when the temperature is 24 °C or greater. But there are all sorts of other things you could do, […more…]

Jan 152016
RasPiO Pro Hat  - Putting Pi Ports in Perfect Positions for Productive Play

Today I launched the RasPiO Pro Hat on Kickstarter. It’s a Raspberry Pi Hat for GPIO tinkering (it goes perfectly with GPIO Zero). It arranges the GPIO ports in numerical order around a mini-breadboard, which, to my knowledge, has not been done before. It also replaces the RasPiO Breakout Pro (now end of life) because it protects all the ports from over-current and over/under-voltage as well. It should prove a very useful board for GPIO tinkering and education. Have a look at the video and pop on over to the RasPiO Pro Hat campaign page […more…]

Jan 072016
Always Test Everything - Twitter App Update

I’m a firm believer that you should always test things in advance. It helps avoid unexpected last-minute panics when things don’t work as you expected them to. On Friday I’m going to pick a winner from my twitter followers using the twitter app script I wrote back in October 2013. My Joey from @gooligumelec just arrived. :) I have a spare I will give to a randomly selected follower on Friday. — RasPi.TV (@RasPiTV) January 5, 2016 It Still Works, But… Since I had no idea where the SD card with that old Raspbian […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…]