{"id":17028,"date":"2017-09-20T10:00:15","date_gmt":"2017-09-20T09:00:15","guid":{"rendered":"http:\/\/www.recantha.co.uk\/blog\/?p=17028"},"modified":"2017-09-20T08:51:17","modified_gmt":"2017-09-20T07:51:17","slug":"raspio-inspiring-pyramid-putting-it-together-and-a-review","status":"publish","type":"post","link":"https:\/\/www.recantha.co.uk\/blog\/?p=17028","title":{"rendered":"RasPiO InsPiRing Pyramid – putting it together and a review"},"content":{"rendered":"

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Back in March 2017, Alex Eames ran a Kickstarter<\/a>\u00a0for RasPiO InsPiRing<\/a>, a system that enabled you to ‘sculpt lights with RGB LED shapes’.<\/p>\n

TL;DR – I got the Pyramid bundle in the Kickstarter, had great fun soldering it up and was particularly impressed with the assembly instructions. The whole system is Highly Recommended. I’m also happy to report that Inspiring has now moved on to general sale<\/a>.<\/strong><\/p>\n

The campaign<\/h2>\n

The campaign was successful, taking over \u00a320k, and Alex set about producing the products which were: a ‘straight 8’ stick, a circle, a triangle and a driver board pHAT for the Raspberry Pi. All the shapes are populated with SK9822 RGB LEDs. They are, rather ingeniously, all the same ‘pitch’ – 1cm between the LEDs – which means that when you assemble the shapes into your ‘sculpture’, they look like they belong together. Alex also put together several kits – an NTP clock, a Pyramid and a ‘bits and bobs’ kit with several different shapes.<\/p>\n

I always back Alex’s Kickstarters – not only is he a good personal friend but he also tends to deliver early, and this time is no exception. Delivery was a whopping<\/em> three months early, so it was with great excitement that I received the package containing my kit – the Pyramid. I wanted to get the Pyramid because I was hoping to build a VU meter<\/a>\u00a0so that all the LEDs would pulse with the sound of music (which, no doubt, the hills are alive with).<\/p>\n

Assembly<\/h2>\n

Before I got to that, however, I needed to assemble the Pyramid from the kit parts. Alex had warned me that it was a bit fiddly soldering the Pyramid together, so I was greatly relieved when he told me that there was an assembly video<\/a>. As per usual, the video is excellent, full of close-ups and clearly stated instructions. It took me about two hours to solder everything up. I didn’t rush, I just worked methodically. There are two elements to the build which I found particularly tricky:<\/p>\n

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  1. Bending the wires\u00a0just<\/em> right to go between the connection holes.<\/li>\n
  2. Hooking the internal wire at the top, right at the end.<\/li>\n<\/ol>\n

    Here’s a photo of the finished build (I’m using Alex’s photos – they’re so much better than mine):<\/p>\n

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    and here’s the internal shot (with the tricky hook-over\u00a0right<\/em> in the centre of the top of the pyramid):<\/p>\n

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    I have to say, I’m not what you’d call an expert maker (much as I’d like to be) and I found the build challenging, but not impossible: it just takes time.<\/p>\n

    Next up, I needed to assemble the Raspberry Pi driver board, because I wanted to use it with the Pi. There are plenty of other ways you can use the InsPiRing shapes – Arduino, Wemos and Digispark are all usable – but I’m a Pi person. Fortunately, Alex has done another assembly video<\/a>\u00a0for the driver board. This is a much simpler affair and is very reminiscent of the Analog Zero<\/a>\u00a0build (also highly recommended) with headers and a chip socket the highlights.<\/p>\n

    Connect it up<\/h2>\n

    Finally, I’d finished soldering. The next step was to fix the driver board to a Raspberry Pi, connect up the Pyramid and boot up into Raspbian. Having done that, I took a look at the instructions page<\/a> and discovered the Inspiring GitHub repository<\/a>. I cloned the repo onto the Pi and then looked into the folder to see what was available to test things out. There are numerous examples for the different shapes, all of which I adapted to use the 72 LEDs available on the Pyramid. There are a couple that just don’t ‘work’ with the Pyramid as-is, but this is to be expected. There’s the clock example which is suitable for the circle, and there’s an example which works with the MCP3008 analog-to-digital converter chip which can be added to the driver board but which I didn’t have. I will add it at some point, though – just for fun, if nothing else, because I just love a bit of analog! There is also, thank goodness, a user guide to download<\/a>.<\/p>\n

    Take a look at the video below – this is the updown-pyramid.py example. (Much kudos if you leave a comment on this blog post with the title of the piece of music, and where it’s from!<\/em><\/strong>) The video does the product much more justice than the static photo at the top of the page. I did find that if I put the brightness of the LEDs up to maximum that it caused the Pi to crash, due to a voltage drop, but Alex had warned me about that. It’s also covered in the extensive documentation<\/a>. I was using an official Raspberry Pi power supply, the 2.5A one, so this is a pretty good example of what’s possible.<\/p>\n