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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

Getting started with ATmega8u2 and other AVR USB microcontrollers

Introduction There is this USB specialized family or group of everyone’s favorite AVR microcontrollers. Apparently, you can use them as USB devices or hosts without any external components. Hell, you can even program them via USB port. All of that without any external component. One of those little guys I wanted to use  for my last project (reflow … Continue reading Getting started with ATmega8u2 and other AVR USB microcontrollers

Analyzing cheap oven for the DIY reflow soldering oven – part II

Introduction In my previous post here, I analyzed cheaply purchased toaster oven that will be used as a reflow soldering oven. In order to make a good reflow oven, with a good PID regulation, we need to know it’s dynamical properties. While in the last post I played with, let call them, static characteristics, the dynamical properties … Continue reading Analyzing cheap oven for the DIY reflow soldering oven – part II

Arduino based, voice commanded, Android phone navigated, Bluetooth controlled – robot car

Introduction As the title suggests, my latest weekend project was a very exotic kind of robot: it was a vehicle based on the AVR Atmega microcontroller that can be controlled using voice recognition system of an Android phone.  The project I made was simple, it only uses the basic functionality of the robot car: turn on, turn off, … Continue reading Arduino based, voice commanded, Android phone navigated, Bluetooth controlled – robot car