Elektor №6 2014г

Название: Elektor

Год: 2014

Месяц: Июнь

Номер: 6

Страниц: 92

Формат:DjVu

Язык: Английский

Размер: 7.20 Mб 

 

 

Elektor - популярный зарубежный журнал по электронике и схемотехнике

Projects

8  Android User Interface Builder
The FTDI FT311D is a flexible bridge that can interface your circuit to an Android
smartphone or tablet. It offers options for seven digital outputs, four PWM
outputs, asynchronous serial and I2C and SPI interfaces. To make things simple
we have designed a small board to carry the chip: introducing the ‘Elektor
Android breakout board’.
14  Lathe Tachometer
Here’s a non-invasive, all electronic add-on to display the running speed (rpm)
of your lathe or milling machine, be it CNC or vintage. It’s state of the
art—witness the use of an Arduino Micro board and a .96 inch OLED display
for instantaneous readout. The little instrument also has a clock displaying
the equipment running time.
18  Touch-2-Switch
This capacitive-detection dual wall touch-switch, designed to fit into domestic
electric wall-boxes, uses analog technology throughout. A single
multi-purpose version that you can configure as you wish to function as a
simple on/off switch, a 2-way switch, or momentary button, on two independent
channels.
26  Seismic Detector
This simple circuit generates acoustic and visual alarms when it detects a
shock, vibration or earth-quake. It also has a relay that can be used to energize
other devices or external indicators.
30  Microcontroller BootCamp (3)
This month we focus on the analog to digital converter, which is effectively a
voltmeter built into the microcontroller. The A/D converter simply supplies data.,
which has to be transmitted. That’s where the serial interface comes into play.
40  XXL LED VU Meter
The circuit described here has an exceptionally wide input range of 60 dB and
a step size of 1 dB thanks to the use of 6 LM3915 driver ICs, which control a
total of 60 LEDs. An interesting aspect of this design is that it is entirely analog
(there is no microcontroller to be found) and that has a didactic purpose.
46  DIY I2C for Raspberry Pi
What do you need for this? Actually not that much: a Raspberry Pi board, an
SC card with the Raspberry Pi operating system and I2C drivers, a PIC 16F88
microcontroller, a PIC programmer, and a
breadboard with an LED, an LDR and a few bits of wire.
50  Dimensioning  
Photovoltaic Panel Arrays What’s the promise of monocrystalline silicon,
polycrystalline silicon, amorphous silicon, and CIS cells  when arranged in
a solar panel and charging a battery?
56  Hack-Your-Own Reflow Oven
Thanks to SMDs, printed circuits are getting smaller—and thus the cost of
projects. The fact remains that for soldering these miniature components,
you need little fairy fingers... or a reflow oven! You’re hesitating?
74  Multi-switch Lights Control
Complex electrical wiring is required if a single load like hallway or corridor
lighting is to be switched on and off by any one of a large number of switches.
Here we propose a workaround using a DIY thyristor.

Industry

76  News & New Products
A selection of news items received from the electronics industry, labs and
organizations

DesignSpark

64  DesignSpark Tips & Tricks
Day #11: Working with Large
Designs
This month we learn how to deal with multiple-schematic sheets in
DesignSpark PCB.
66  Varactor Diodes
Weird Components—the series.
68  3D-print Your Own Ink
Our 3D printers really should be put to good use, like printing stuff that’s useful to electronics engineers.
70  Jumbo PCB To Escape From Labs
The Elektor lab PSU design incorporating the PCB transformer we wrote about is one step closer to prototyping and testing.

Labs

80  Retronics
Elektor ComputerScope (1986).  
Almost 30 years ago a trainee at Elektor Labs designed an ambitious test instrument like an oscilloscope with PC support.  Series Editor: Jan Buiting.
84  Hexadoku
The Original Elektorized Sudoku.
85  Gerard’s Columns: Lazy Days
A column or two from our columnist Gerard Fonte.
90  Next Month in Elektor
A sneak preview of articles on the Elektor publication schedule.

Regulars

72  Chip Tips: The MAS6510
Highlights of a new capacitance-to-digital converter.