I’ve been a little quiet lately; some of that was end of the semester and family activities, but part of it was that I’ve been trying to put the finishing touches on a new project. I now think that OMIS – the open millifluidic inquiry system, is ready for display.
No, there’s no typo in the title. While this post does describe building an instrument (a colorimeter) from scratch, it also uses the Scratch programming language to control the operation of the instrument. Read on to learn the why’s and how’s.
Andy Brunning over at Compound Interest has created a great infographic to help explain some of the chemistry behind the Flint water crisis. The graphic is below, but I strongly encourage you to take a look at his full article
Andy’s post introduces a lot of concepts that could be incorporated into a Chemistry lecture, making it a potentially valuable resource for connecting what students may find as esoteric concepts to real-life situations. Check out the full article while I jot down some ideas for exam questions….
As one of my ‘loyal readers’ has pointed out (thanks Nick), the schematic in the MagPi has the LED in the wrong way. Be sure to connect the negative side of the LED to Ground and the positive side to GPIO25.
Wolfspec 2.0 – Spectrometry with the Raspicam
This post is a reprint of an article I wrote on my earlier website. I’ve tried to update the links and images, but may have missed a few.
I recently purchased the camera that attaches to a Raspberry Pi and thought about how one might be able to make a spectrophotometer using the camera as a ccd-like detector. This work is still in progress, but with relatively few steps, I was able to get an instrument up and running (and even calibrated – sort of).
This is a classic article which I’ve restored from a former version of my website. It has been modified from the original version.