Elektor 07-08.2009.pdf
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www.elektor.com July/August 2009
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electronics & microcontrollers
SUMMER CIRCUITS CIRCUS
ElektorWheelie
R35
more than 100 circuits, ideas & tips
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S O F T W A R E A N D H A R D W A R E S O L U T I O N S F O R E M B E D D E D W O R L D
electronics & microcontrollers
Summer Circuits —
made for you, by you
As the days shorten
and the irst autumn
winds howl and buf-
fet the castle walls,
the initial plans are
drawn up. Seasons
pass, autumn and
winter make way for
spring, and when
everyone looks like
they could do with
a bit more sunshine
on as well as in their
faces, it’s inished
and ready for print-
ing: Elektor’s Sum-
mer Circuits edition!
To mark the real
start of ‘SC, howev-
er, we must go back
even further in time
— to the beginning of the summer of 2008, when many of you
were thinking up exciting new ideas for the edition and eventu-
ally got round to sending them by email — and some even by
snail mail.
Summer Circuits has been a collective efort since it was irst
produced, now over 30 years ago. Every year we receive over
500 entries and ideas for publication! The projects come from all
over the world, and we happily evaluate each item because the
efort conirms the creativity and ingenuity of you, our readers.
All circuits in this edition have been tried and tested by Elektor
Labs so repeatability should not be an issue if you read and
work carefully.
Plus
Colophon
6
ElektorWheelie
66
Hexamurai Puzzle
124
Elektor SHOP
128
Coming Attractions
132
SUMMER CIRCUITS 2009
(Colour of title indicates category,
bold type
= PCB design included)
Audio, Video & Photography
Audio Source Enhancer
94
Automatic TV Lighting Switch
52
DMX Transmitter
108
Guitar Ampliier PSU
105
Guitar Pick-up Tone Extender
60
Improved Hybrid Headphone Ampliier
114
Load Protection for Audio Ampliiers
72
Sensitive Audio Power Meter
97
SRPP Headphone Ampliier
15
Stereo Widening
38
S-video Converter
41
Two TV Sets on a Single Receiver
100
Vocal Adaptor for Bass Guitar Amp
59
Wireless S/PDIF Connection
23
ElektorWheelie
While ElektorWheelie was mostly ‘under cover’ in the June 2009
edition, this month we are unveiling the electronics starting
on page 66 . Our DIY ‘self-balancing two-wheeler’ will take you
further, both in distance and knowledge. In distance, because
it is designed to take you from A to B in spectacular fashion. In
knowledge, because ElektorWheelie is an ‘Open Development.
Open for students and companies to redesign or modify, to
make it even faster, or to make it go farther on a battery charge.
Who knows, we might even organise an ElektorWheelie Com-
petition.
Have fun exploring this electrifying collection of more than 100
circuits, tips and ideas. None of our competitors has ever man-
aged to publish anything remotely resembling our Summer Cir-
cuits edition. And don’t forget, after a long day spent reading,
soldering or measuring, comes well deserved recreation.
Computers, Software & Internet
Cheap Serial Port for the Mac
11
Control Interface via PC Keyboard
46
Fan Speed Controller
49
Network RS232
81
One Wire RS-232 Half Duplex
24
PC Power Saver
122
Powering a Second Hard Drive
77
Pseudo Fan
17
Remote Control for Network Devices
120
TurboGrafx-16 (PC Engine) RGB Ampliier
48
USB Switch
64
VGA Background Lighting
22
On behalf of the Elektor Team,
Wisse Hettinga
International Coordinating Editor
Hobby, Games & Modelling
Acoustic Distress Beacon
106
Annoy-a-Tron
34
CONTENTS
Volume 35
July & August 2009
no. 391/392
Braitenberg Robot
116
LEDify It!
32
Breadboard/Perfboard Combo
26
Lithium Charger using BQ24103
61
Full-colour Night-light Illumination
84
Single Lithium Cell Charger
110
Going for Gold
102
Single-cell Power Supply
82
Impact Clock
74
SSR 2.0
42
Lighting Up Model Aircraft
30
Lipo Monitor
21
RF (radio)
0-18 MHz Receiver
Low-drop Series Regulator using a TL431
22
Servo Driver
91
12
Speed Control
43
FM Audio Transmitter
90
Pre-emphasis for FM Transmitter
96
Home & Garden
12 V AC Dimmer
62
Test & Measurement
Automatic Bicycle Light
121
Digital Sweep and Sinewave Generator
104
Automatic Curtain Opener
75
Frequency and Time Reference with ATtiny2313
56
Bathroom Fan Controller
97
Measuring Milliohms with a Multimeter
106
Chill Out Loud
92
Preampliier for RF Sweep Generator
10
Daylight Switch
45
Quartz Crystal Tester
112
Dimmable Aquarium Light
with Simulated Sunrise and Sunset
Servo Scales
28
93
Simple Temperature Measurement and Control
62
Economy Timer
83
SMD Transistor Tester
39
Long Duration Timer using ATtiny2313
111
Smoggy
85
Luxeon Logic
10
Tester for Inductive Sensors
101
Phone Ring Repeater
53
Power On Indicator
99
Miscellaneous Electronics &
Design Ideas
Power-up/down Sequencer
50
Pulse Clock driver with DCF Synchronisation
54
Remote Washing Machine Alert
31
Backlight Delay 98
Cut-rate Motorbike Alarm 103
Floating Message 51
Four-component Missing Pulse Detector 44
Freezer Trick 32
Frequency Divider with 50% Duty Cycle 58
Hassle-free Placement of SMD Components 44
LED Bicycle Lights 30
Micropower Crystal Oscillator 52
Momentary Action with a Wireless Switch 27
PR4401 1-Watt LED driver 47
Programmable Nokia RTTL Player 18
Simple Wire Link Bender 82
Simple Wireless and Wired Emergency Stop System 35
Slow Glow
Snail Mail Detector
107
Solar-driven Moisture Detector
86
Switching Delay
19
Two-button Digital Lock
78
Wireless Baby Monitor
80
Microcontrollers
Driver-Free USB
29
Easy LEGO Robotics Set Up
16
An E-blocks IR RC5 Decoder
118
I
2
C Display
88
Port Expander
14
Six-digit Display with SPI Port
20
14
USB Radio Terminal
101
Start-up Aid for PCs
13
Stress-o-Meter
76
Power Supplies, Batteries & Chargers
Desulphater for Car Batteries
TL431 Multivibrator
40
35
Doubling Up with the PR4401/02
95
Lead-Acid Battery Protector
75
Plik z chomika:
unipolarny
Inne pliki z tego folderu:
Elektor 07-08.2009.pdf
(15153 KB)
Elektor 09.2009.pdf
(15869 KB)
Elektor 10.2009.pdf
(13367 KB)
Elektor 12.2009.pdf
(12670 KB)
Everyday Practical Electronics 2006 07.pdf
(9248 KB)
Inne foldery tego chomika:
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