Tags » Measurement

10" slide rules

10” slide rules
Hemmi, made in Japan, c.1954
Aristo, made in Japan, c. 1960
Royal, made in Japan, c.1960

The first slide rulers were developed in the C17th, for mathematical calculations. 138 more words


SDS011 sensor data for air quality measurement

I got a Nova Fitness SDS011 sensor for measuring air quality. It has a serial interface and outputs data with 9600 baud. The serial interface pins Rx and Tx are specified as TTL with 3.3V levels. 401 more words


Determining the right social networks for marketing

Reaching an audience through social media can be maddening. But even more so by using the wrong channels.

Because social media marketing is a time-intensive chore, we must figure out which networks to use from the start. 375 more words


Time gets Vague when Measured

Heisenberg Continues to Have a Say, I think.

Research recently published in the Proceedings of the National Academy of Sciences, which begins to get into the fuzzy, indeterminable nature of time when measured at very tiny intervals. 943 more words

Calendar Reform

Pi Day (with minimal mention of digits)

Today, we celebrated our belated Pi Day! It was delayed due to inclement weather…

Though my #MTBoS friends were there to comfort me in my time of need! 459 more words

'80 in 20'...erm, can we change that?!

This is a bit of a ‘back to basics’ post, inspired by refreshing my memory from reading a superb book. It’s long…but hopefully interesting :) 3,067 more words

Brain Farts


One definition of hope is “to look forward with reasonable confidence”.

“Give and gifts will be given to you;
a good measure, packed together, shaken down, and overflowing, 513 more words