Peter has sent his newest arduino project that we might find really practical. Probably many of us find ourself in situation when wee need to switch between speakers and headphones while sitting by computer. This leads to messing around tons of wires behind table. So here is a better solution and probably more fun – [...]

When someone tells you that you can draw your favorite music by simply using a pencil, would you consider that person a nuts? Honestly, it’s very hard to convince the public that we can actually drawing the music with only a 2B pencil! However, nothing is impossible, especially in this bizarre 21st century, where many [...]

You’re getting enough with the wire-controlled mouse and ready to have something different here? If you didn’t have the desire to buy the ready-to-use wireless mouse, then it’s time to show up your talent: Go and build an amazing wireless accelerometer based mouse! You’re wondering, “What’s the specialty of this wireless accelerometer based mouse and [...]

For all the home hobbyists, you knew that dealing with microcontrollers is a fun thing. Once you have been hooked with it, there was no turning back. Do you know that a microcontroller’s GPIO (General purpose input/output) pins cannot handle higher power requirements? An LED was easy enough, but how about the large power items [...]

Are you really frustrated at the time you’re cannot find the suitable and simple negative power supply when you need it the most? Well, isn’t doing an electronic project should be a fun test? You can immediately change the above unhappy moment into a joyful moment. How? Well, all you have to do is create [...]

Probably you saw Sun tracking system before; however do you have the urge to challenge yourself to make a Sun Tracking Unit? First of all, get a tiny .7″x1.4″ PC board using the LED3X sensor concept. This circuit uses power MOFSET drivers, which most any DC motor can be used without any modification. You might [...]

The biggest benefit I see when working with pulse soldering iron is speed and effectiveness. Of course when you don’t work, it stays cool this means it saves energy, doesn’t evaporates poisonous steam and there is no risk accidentally to burn yourself. Well this one even has has light source for better view when soldering. [...]

The idea of reading temperature via USB is very simple. Construction is reliable, precise and requires few components. Circuit is very simple as there is USB to UART converter IC used.   USB to UART conversion is performed via F232RQ chip from FTDI (Future Technology Devices International). Besides ability to convert this chip also can [...]

This filter was designed to filter 1kHz frequency of telemetric signal from environmental noise. Filter itself is very simple built with acceptable electronic parts worldwide. This filter can be used in any circuit because of it’s simplicity.   Circuit contains minimal amount of parts including one general purposes NPN transistor with coefficient 50…70 an more. [...]

Sometimes you just need to connect some device to COM port, but computer don’t have one especially laptop. There are two ways – go and buy USB – COM adapter or build one. So if you decided to build USB to COM(RS232) adapter, there is one of solutions.   This adapter is very easy to [...]