Pero – HELENTRONICA

December 10, 2017December 16, 2017

Building a Circulator out of Ceramics

Introduction During my time as a PhD student, I had an opportunity to work in the laboratory of ceramic technologies. I got to produce various electronic components based on so-called low temperature co-fired ceramics, or LTCC. Although it’s been more than 2 years since I left that lab, I found some time to reflect back … Continue reading Building a Circulator out of Ceramics

October 2, 2017October 2, 2017

Playing with an LMG670 power analyzer

Introduction Recently, I got my hands on a not-every-day piece of electronic instrumentation, a so-called power analyzer LMG670 by company ZES Zimmer. I was told “it’s just a big multimeter” and I could use it to test power efficiency of our system. Power analyzer allows us to measure voltage, current, power and all relatable values on one, two … Continue reading Playing with an LMG670 power analyzer

May 3, 2017May 4, 2017

Advanced PCB Layout Course by Fedevel Academy

Introduction Being a freelancer, one can never stop improving himself, get a new trade or sometimes even to revise the things he has already mastered. With this in mind, I came across Advanced PCB Layout Course by Fedevel Academy, a hardware design/consultancy company by great engineer Robert Feranec. This post is about my impressions, experiences … Continue reading Advanced PCB Layout Course by Fedevel Academy

December 23, 2016October 2, 2017

Playing with a signal demodulator

Last week I got a Christmas present! Actually, it’s not a present, it’s a tool for work. But it is a brand new spectrum analyzer! Actually, it’s not brand new, it’s at least 15 years old. The basement guy found it in the company’s basement and brought it to my office to see if I … Continue reading Playing with a signal demodulator

November 8, 2016January 19, 2017

Building an ARM based microcomputer at home

Introduction Having my reflow solder oven finished, I couldn’t wait to see how far can I challenge it with complex circuit boards and tiny components. I decided to build a system with components that are tricky to solder, such as BGA and QFN packages. Not interested in designing the whole circuit on my own, I … Continue reading Building an ARM based microcomputer at home

August 22, 2016September 8, 2016

Remember the memories

Introduction I’ve been trying to sort out all those computer memories in some meaningful order in my head for some time and it turned out to be not an easy job. Partly because of my head and partly because of all the various memory types out there: volatile, non-volatile, read-only, RAM, DRAM, SDRAM, permanent, Flash…does … Continue reading Remember the memories

June 14, 2016June 20, 2016

1 GHz Bandpass Filter with Distributed Elements

Introduction Working in a microwave engineering area I learned that classic components like capacitors or inductors are ditched away from the filter design and so called distributed elements are used. It means, basically, that inductances, capacitors, LC circuits are created using conductive lines on PCB instead of soldering old school components. Pretty cool, I thought, let’s … Continue reading 1 GHz Bandpass Filter with Distributed Elements