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Elektor №9 2014г
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Elektor - популярный зарубежный журнал по электронике и схемотехнике
• Projects8. Professional Lab Power Supply
Broadly speaking, low cost and high quality (low noise and good regulation) are mutually contradictory requirements. Specifically for power supplies, the logical solution to this dilemma is to combine linear and switching technologies in order to reap the benefits of both, which calls for a more complicated design.
20. T-Boards 8/14/28
As your projects become more ambitious, at some point you may need to make the move away from the Arduino platform. More complex projects, particularly those that need a specific physical form, are often best implemented with custom PCB designs that directly incorporate the microcontrollers. Enter Elektor's T-Boards-8, -14 and -28.
30. Microcontroller BootCamp (5)
One of the longest chapters in the ATmega328 data sheet is the one that describes its three timers. The timers can be used in so many different ways that we only have space in the article to look at a small fraction of the possibilities. The main application areas are in measuring time intervals and frequencies, and in generating various signals including PWM output.
40. 16-bit Data Logger
To make accurate voltage measurements you need an A/D converter (ADC) chip which has good resolution. The folks at Elektor Labs have developed a board containing a four-channel 16-bit ADC. It's no coincidence the board uses a Gnublin/EEC connector which makes it compatible with Elektor's Linux board, the Xmega Webserver and the latest Extension shield for Arduino.
46. Isolated Oscilloscope Probe
An oscilloscope with electrically isolated inputs is out of the financial reach of many. Even differential probes, which (within certain limits) enable voltages to be measured without reference to ground, often cost the private user more than a complete scope does. So what can you do when either safety considerations or the nature of the task in hand require the use of isolated connections to your oscilloscope? You build the Elektor Isolated Oscilloscope Probe.
68. Three-way CH Boiler Valve Monitor
How a 5-dollar circuit can help to prevent costly repairs on central heating boilers.
70. Efficient Water Solenoid Valve
An intelligent low-power control circuit for a reverse osmosis water filter.
• Review62. VlrtualBench: Multi-function Measurement Instrument
VirtualBench uses the functionality of a PC or tablet for its display and operation, meaning that it doesn't need a built-in screen or controls. This idea is certainly not new, but it has never been taken as far as in this device.
• Industry74. Taking the Strain
A novel approach to performing strain gage measurements using PSoC technology and a clever algorithm.
78. News & New Products
A selection of news items received from the electronics industry, labs and organizations.
• DesignSpark54. DesignSpark Tips & Tricks
Day #13: Component placement. This month we look at the choices available to users to place components on PCBs: automatically or manually.
56. Peltier modules
Weird Components—the series.
• Labs58. ELPP: Elektor Labs Preferred Parts
Clemens Valens discusses the advantages of purposely limiting the choice of parts that are "nothing special", like eiectrolytics and .25W resistors.
60. Inexpensive MyDAQ Connectivity
A clever solution for a hard to find connector with .15-inch pin spacing.
• Regulars84. Hexadoku
The Original Elektorized Sudoku.
BK Precision BK560 Programmable 1С Tester A glimpse back to the glory days of TTL (74xx) and CMOS (40xx) ICs, when testing and replacing individual devices was serious business if not craftsmanship. Series Editor: Jan Buiting.
85. Gerard's Columns: Engineering Success
A column or two from our columnist Gerard Fonte.
90. Next Month in Elektor
A sneak preview of articles on the Elektor publication schedule.
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