Archive for March 2015

Building A Laser Oscilloscope

You can generate some pretty amazing patterns by shining a laser onto a mirror mounted on a vibrating speaker cone, a lot of people have experimented with this kind of laser show. But how about building a true laser oscilloscope that is capable of displaying signals? In this post, I will show you just that. For those who are impatient, I included a video towards the end. Continue reading ‘Building A Laser Oscilloscope’ »

When to Use An Electrometer?

Electrometer is a piece of highly specialized electronic test equipment. Most of us would naturally associate it with low-level measurements (e.g. low current pA, fA and high resistance GΩ measurements) only, but the situations under which you might need to use an electrometer are actually far more common then you might have thought. In this post I will discuss a couple of situations where using an electrometer is crucial. And at the end of the post I included a video for some demonstrations. Continue reading ‘When to Use An Electrometer?’ »