burning out by using a ballast resistor. Then add in the dwell feature that
starts to charge the coil a fixed period
before firing.
Note that if the RPM is high, the
full dwell period may not be available
as there isn't the time to fit in firing
and the full dwell period before the
next firing. You need to have a minimum firing period so that the dwell
period will not reduce spark duration
at high RPM.
Can SiDRADIO be used
with the Raspbery pi?
Can I use the DVB-T dongle, as featured in the SiDRADIO project (October-November 2013) with the latest
version of the Raspberry Pi? I have
subscribed to Silicon Chip for seven
years and it's a great magazine! (C. J.,
Samson, WA)
• You possibly can but bear in mind
that the SiDRADIO design is based on
Windows software. If you wanted to
interface to the Raspberry Pi, you need
to use a different software package.
Unfortunately, we are not in a position
to help you with this but it looks like
what you are asking about has been
done already; have a look at: www.
rtl-sdr.com/tag/raspberry-pi/
ETI 601 Music
Synthesiser kit
I can see from your website that you
are involved in old DIY kits from ETI
magazine. I'm interested in purchasing the kits or parts (eg, PCB) for an
old ETI Project (601 Music Synthesiser
3600/4600: October 1973 to July 1974)
about the construction of an ETI 4600
analog synthesiser. (A. G., by email)
• This was a true breakthrough
project design for ETI and it has never
been bettered. It is now over 40 years
old and while virtually all of the electronic components should still be
available, there are no PCBs and nor
do we have the PCB (tape) artworks in
our archive, unfortunately.
Even if the boards and metalwork
were still available, building it today
would be a very expensive proposition and you would be able to provide
all its facilities with a much cheaper
digital design you can now buy off
the shelf.
However, if you want to peruse all
the articles we can provide PDFs and
these can be ordered from our online
shop.
Advertising Index
Allan Warren Electronics...... 103
Altronics............................. 76-79
Digi-Key Electronics................. 3
Freetronics.............................. 65
Hare & Forbes.................... OBC
Jaycar ........................ IFC,49-56
Keith Rippon Kit Assembly ...103
LD Electronics...................... 103
LEDsales.............................. 103
Master Instruments................... 9
Error compiling the
Arduino ECG software
Microchip Technology............... 5
I have downloaded the software for
the Arduino-based USB ECG monitor
that appeared in your October 2015
issue. The problem is that when I verify/compile the sketch, I get an error in
"Assemblyinfo.cpp" as follows: "System is not a namespace-name".
I am running Windows 8.1 and I
compiled the sketch on a computer
with Windows XP with the same results. Can you help please? (J. W., via
email)
• This sounds like an error with your
Arduino IDE installation; "Assemblyinfo.cpp" is not part of our source code
but it may be an internal file used by
Arduino. We suggest you try installing the latest version of the Arduino
IDE, in case the one you currently have
installed contains an error. The latest
version, at the time of writing this, is
V1.6.12 and it is available as a free
download. We just checked that the
sketch compiles using the version we
currently have installed (V1.6.7) and
it completed without errors.
SC
Ocean Controls...................... 11
Mouser Electronics................... 7
PCB Cart.............................. IBC
Sesame Electronics.............. 103
SC Online Shop........ 25,100-101
SC Radio & Hobbies DVD...... 99
Silicon Chip Binders............... 81
Silicon Chip PCBs.................. 13
Silicon Chip Subscriptions...... 15
Silvertone Electronics............. 13
Tronixlabs............................. 103
Next Issue
The February 2017 issue is due
on sale in newsagents by Monday January 26th. Expect postal
delivery of subscription copies in
Australia between January 24th and
February 10th.
WARNING!
SILICON CHIP magazine regularly describes projects which employ a mains power supply or produce high voltage. All such
projects should be considered dangerous or even lethal if not used safely.
Readers are warned that high voltage wiring should be carried out according to the instructions in the articles. When working on these projects use extreme care to ensure that you do not accidentally come into contact with mains AC voltages or
high voltage DC. If you are not confident about working with projects employing mains voltages or other high voltages, you
are advised not to attempt work on them. Silicon Chip Publications Pty Ltd disclaims any liability for damages should anyone
be killed or injured while working on a project or circuit described in any issue of SILICON CHIP magazine.
Devices or circuits described in SILICON CHIP may be covered by patents. SILICON CHIP disclaims any liability for the infringement of such patents by the manufacturing or selling of any such equipment. SILICON CHIP also disclaims any liability
for projects which are used in such a way as to infringe relevant government regulations and by-laws.
Advertisers are warned that they are responsible for the content of all advertisements and that they must conform to the
Competition & Consumer Act 2010 or as subsequently amended and to any governmental regulations which are applicable.
104 Silicon Chip
siliconchip.com.au
