Burkhard Kainka (231)

1-07-2008 | If you are the proud owner of an old oscilloscope tube, you may be interested in using it once more for its original purpose. All you need a...

1-07-2008 | Software-defined valve radio is a single-valve radio turned into a world receiver with some help from a PC. Power comes from four AA cells f...

1-07-2008 | A simple shortwave radio detector is neither very sensitive nor very selective. However, with a little extra amplification we can improve th...

1-07-2008 | Piezo crystals can generate voltages of many tens of volts when given a firm enough prod with a finger to bend the baseplate. The charge mov...

1-07-2008 | The PR4403 is an enhanced cousin of the PR4402 40 mA LED driver. It has an extra input called LS which can be taken low to turn the LED on....

1-07-2008 | The well-known PR4401 and PR4402 LED drivers from PREMA have enjoyed great popularity as a result of their low cost, tiny physical size, and...

1-09-2007 | Elektor September 2007 comes with a board containing an LED booster circuit which you can try out for yourself. Although tiny, the board con...

1-09-2007 | Although bats are common animals, it is rare to actually catch a glimpse of one. In the dark they are practically invisible, and their ultra...

1-09-2007 | Almost as soon as the Software Defined Radio article was published in the May 2007 issue of Elektor Electronics, we started receiving reques...

1-09-2007 | Building an AM receiver is a simple project for a beginner, but building an FM receiver is rather trickier. However, with a little ingenuity...