This is the second part about BJT polarization. Are shown projects of circuits with fixed and emitter’s stable polarization.
UV robot for disinfection
An autonomous robot, built by Akara Robotics, uses ultraviolet light (UV) for disinfection in hospitals.
What are speleothems?
Speleothems are rock formations inside caves, the most known are stalactites and stalagmites. These and other formations are shown in this post.
Photodetector based in quantum dots
Was developed a high efficiency photodetector based in quantum dots.
How a pulmonary ventilator for COVID-19 works?
This post’s subject is the operation of pulmonary ventilator or respirator, for treating pacientes with COVID-19 or Corona virus.
Barcode types (Part 2)
After a long hiatus, I will give continuity to barcode types and its’ applications.
The return of poisonous comet
In end of May, the poisonous comet C/2019 Y4 Atlas will be visible to naked eye from Earth.
Electrical e-Library at CERN (Part 2)
Continuing the visit to CERN. This second and last part is about the permanent exhibition of Microcosm and the guided tour.
Unboxing of a robotic arm
This is a kit of 6 DOF robotic arm with aluminum pieces to assemble. It doesn’t come with servomotors neither instruction manual.
Electrical e-Library at CERN (Part 1)
I was in Geneva, Switzerland, and I visited the European Organization for Nuclear Research (CERN). This site shows permanent exhibition for visitors.

