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Stewart's Blog

Stewart Watkiss website to the world ...

(Children, computing, first aid and other ramblings ...)

Raspberry Pi Disco Lights – Pi Birthday 2016 and 2017

Disco Lights Presentation

Click the image above for the slides for the Disco Light talk at the Pi Birthday 2016.

Worksheet for Raspberry Pi NeoPixel practical session 2017

Below is a worksheet giving hands-on with connecting up NeoPixels to a Raspberry Pi using a breadboard.

This uses breadboard NeoPixels. These do need a little soldering initially, but once soldered can be easily connected to the breadboard and reused as required. Note that some breadboard NeoPixels use a different pin layout, so you may need to modify your design accordingly.

The following is an alternative using through-hole NeoPixel LEDs with no soldering required.

Important Update!

There is a potential problem with NeoPixels due to an incompatibility between the sound driver and the code used to control the NeoPixels. This can be avoided by blacklisting the sound driver to prevent it from loading. The worksheets above include the following instructions, but older versions of the worksheet may not.

To disable the sound driver create a new file called /etc/modprobe.d/snd-blacklist.conf

eg.
sudo nano /etc/modprobe.d/snd-blacklist.conf

Add a single entry
blacklist snd_bcm2835

Now reboot the Raspberry Pi before running the test program.

New Wireless Pixel Server

See the video below for my new wireless pixel server providing wireless access to the Pixels using a Raspberry Pi.

More information

For more information see the NeoPixels page in Penguintutor electronics information.

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UK days out, children and holiday information is also available on the Days Out Diary web site
Linux, LPI and the Quiz / Test Program posts are also available on the Penguin Tutor website
First Aid Information, first aid games and first aid practice test / quiz entries are also available on the First Aid Quiz Web site