Mobile Science Kit RPM Frequency Counter

I just came across an interesting use of a mobile phone for sciency things… a audio frequency analysis to count RPM. Another great video by Matthias Wandel, or what I new him from for many years before I found his youtube channel, The premise is you find the audible frequency spike, combine that with […]

A little bit about light

I’ve been giving myself a crash course refresher on light over the last new months. It started when I picked up a used Laser Cutter and wanted to figure out how it cuts with light. What I’ve written here is my understanding of things. I may be wrong, if so, please let me know in […]

I recently picked up a Seek Thermal camera which plugs into my cell phone and allows…

I recently picked up a Seek Thermal camera which plugs into my cell phone and allows me to see temperatures of stuff. It's a cheap unit, so it doesn't have the built in calibration tables that the expensive 'real' test equipment has. But it's good enough for most people's needs in a non-technical use. I […]

I wrote a bit of OpenScad to laser cut a leather pen case I cut it and am looking at it and while it looks good, I think it is flawed. The little round holes for stitching are easy to tell a robot to make. However, I am thinking that they actually overly weaken the seam. I didn't look for the wisdom in the old fashioned hand […]

It's wonderful what happens when you help others

Something amazing happened this week. A group that I participate in was just given an amazing gift. was given a $600k grant from Having printed and given away the parts for a prosthetic hand, helped with a fundraiser for getting a 3D printer, and spent some time writing a bit of software leveraging […]