Introduction About a year ago we bought a new washing machine which seems to work nice, but it lacks a very important feature: it doesn’t notify me when the washing is done. I usually start a new load in the morning and, even though the programs usually finish in about an …
Introduction At the time of writing this article I cannot really recall why I started out on this project in the first place. Maybe, because some time ago I was experimenting with the built-in analogue-digital converters of some PIC micros and was thinking that they could be used easily to …
Introduction Now that I can take pictures of lightning I decided that I also want to be able to trigger my camera with sound. The design I came up with has the following features: If you like this project and would like to build it yourself all the necessary information …
Introduction The geek inside me has always wanted a fridge that shows the inside temperature for both the freezer and the fridge compartments. However, when we recently replaced our very old fridge we ended up getting a new one without the built in thermometer. So I decided that one of …
Introduction This little project was one of my first projects with microcontrollers. First, I made the circuit then, for years, I was wondering what I could do with it, until one day I came across this IKEA plastic bag dispenser. I knew immediately, it would make a perfect “housing” for …
Introduction I have always been fascinated by photographs about lightnings. While it is relatively easily to put a lightning strike in any photograph using image editing techniques 🙂 I still prefer the real thing. Since photography is a hobby of mine, I wanted to be able to photograph lightnings. However, …
Introduction This is an old school circuit – I made it (with the help of a friend) in 1987, when I first started out in digital electronics. At the time there were no PCs – or at least not for the average person in Hungary. So all the planning was done in …
Introduction This digital clock displays the time in binary format. Binary clock s have become very popular recently, many hobbyists create their own version of it and they are even available commercially. To decode the time you need to be familiar with the binary number system and have to decode …
Introduction During the development of embedded projects debugging sometimes can get difficult. There are a number of ways to help troubleshoot problems – a scope or a logic analyzer go a long way narrowing down the problem (although a bit expensive for the hobbyist), a serial connection is extremely useful …
