Matt circuit

OK, let’s finish off our Cigar Box Guitar. If you haven’t already read parts one and two, they can be found here: http://diystrat.blogspot.com/2012/06/making-cigar-box-guitar-part-1.html and here: http://diystrat.blogspot.com/2012/07/making-cigar-box-guitar-part-2.html. I want to add some fret markers to the neck, but before that I want to fill in a few holes, as can be seen here: I glue in some toothpicks: Cut them and sand them down: It’s not a perfect colour match, but I think it gives it some personality. Now for marking the frets, I use an online calculator to determine the positions and mark them out with a pencil. There are many sites that provide fret calculators, but I used the one here and it worked great: http://www.tundraman.com/Guitars/FretCalc/index.php I should add here that since this will be a slide guitar only, we won't need any proper frets, just markers. Then I use a soldering iron to burn in the lines and the dots: We pretty much have a complete Cigar B...

Nowadays, almost all computer systems have logic blocks for working with a USB port. A USB port, in practice, is capable of supplying more than 100 mA of continuous electric current at 5V to the peripherals which are hooked up with the bus. So a USB port could be utilized, without having any problems, for powering 5V DC operated tiny electronic devices. Today, a lot of handheld gadgets (for example, portable reading lamps) utilise this resource of the USB port to recharge their built-in battery pack using the support of an internal circuitry. Typically 5V DC, 100mA electric current is needed to satisfy the input electrical power demand. The above diagram shows the circuit of a versatile USB power socket that properly converts the 12V battery voltage into stable 5V. This circuit can make it possible to power / recharge any USB power-operated device, working with in-dash board cigar lighter socket of the car.   The DC supply presented from the cigar lighter socket is fed to an adj...