Remember the hockey puck of doom that powers the Tesla Gun? It’s a ZVS driver (also called a Royer oscillator) that drives a flyback transformer using an 18V drill battery. I used to make them as

Back in 2009, I was one of several folks that built the coin shrinker at Hackerbot Labs.  After several hundred firings and sitting in a closet for months, it badly needed some love. We moved it to my

Last year I signed up for Arivale’s beta program. They’re attempting to quantify participants’ state of health through DNA sequencing, gut microbiome sequencing, FitBit tracking, interviews,

I designed a 3D-printable eyepiece holder that mates a Raspberry Pi camera to a popular inexpensive stereo inspection scope. This lets me send 5MP images from my AmScope straight t

Back in business. What should I look at next?<img decoding=”async” loading=”lazy” class=”aligncenter size-large wp-image-1557” src=”uploads/2015/12/pollen-annotat

A couple of months ago, Milly started having beam issues. At the time it seemed like emitter trouble. New emitter modules run about $3k, so I took the opportunity to look into manufacturing

I recently picked up an AmScope SE400Z inspection scope. It’s a handy desktop microscope that sells for under $200. The large area under the objective lens leaves plenty of room to work, and the 10-20

…when you’ve got tungsten to recrystalize?