circuit diagram has it drawn correctly
(anode to pin 2 of IC3). I initially suspected I had a faulty L6571 (IC3). I
have since replaced it with a new
one, but it made no difference. (A. C.,
Kelso, NSW)
● Notes & Errata can be viewed from
siliconchip.au/Articles/Errata – in
this case, there are no relevant entries.
Diode D7 is orientated correctly in
the circuit diagram; it is just that the
180kW resistor and series-connected
diode are transposed. The circuit operation is the same.
So long as IC3 has at least 10.5V
as a supply, it should operate. Otherwise, check the component placement,
soldering and for any shorts between
adjacent connections.
Also verify that your replacement
L6751 is the A version, not the B version. We supply the A version in our
parts set as that is what the design
requires.
This is a popular project with hundreds built and few complaints, so we
don’t think it has any major flaws. You
Advertising Index
Altronics.................................57-60
Dave Thompson........................ 111
Digi-Key Electronics...................... 3
Emona Instruments.................. IBC
Hare & Forbes..........................OBC
icom Australia............................. 10
Jaycar.............................. IFC, 9, 11,
.........................26-27, 43, 86-87, 97
Keith Rippon Kit Assembly....... 111
Lazer Security........................... 111
LD Electronics........................... 111
LEDsales................................... 111
likely have either a dud component or
a placement/soldering problem.
Pressure sensor for
Ignition System
I am considering buying the parts
you have available for the Programmable Ignition System for Cars (MarchMay 2007; siliconchip.au/Series/56)
on your website.
I am having trouble finding the part
number for the PCB-mounted pressure
sensor and where I could purchase it.
Do you know of anywhere there still
might be a complete kit available? (P.
H., Blackburn, Vic)
● All kits for that project have been
discontinued. The Sensym pressure
sensor is unavailable, so we recommend using a MAP (Manifold Absolute Pressure) sensor instead, available from a salvage yard/wrecker. Use
a 1bar sensor for naturally aspirated
engines or a 2bar sensor for boosted
engines. The article shows how to use
a MAP sensor.
Although the kits have been discontinued, the major parts like the PCBs
and programmed microcontroller are
available from the Silicon Chip shop
(siliconchip.au/Shop/?article=2233).
You should be able to obtain the rest
from electronic component retailers.
Car radio antenna
amplifier wanted
Did Electronics Australia ever
publish an antenna amplifier for AM
reception in car radios etc? I can’t
seem to find any! I still have a stack
of EA magazines dating back to the
mid-1960s.
I loved EA back in the day. I first
saw EA in the library when I attended
technical school in the 1960s. I was so
fascinated by the articles that I began
Mouser Electronics....................... 4
SC GPS Analog Clock............... 108
SC Radio TV & Hobbies............ 105
Silicon Chip PDFs on USB....... 109
Silicon Chip Shop.................88-89
Silicon Chip Subscriptions........ 71
The Loudspeaker Kit.com............ 6
Tronixlabs.................................. 111
Wagner Electronics..................... 93
112
Silicon Chip
Errata & Sale Date for the Next Issue
Microchip Technology.................. 7
to make some of the projects. I was
lucky that Mum got me a Scope soldering iron and a multimeter for my
13th birthday (a long time ago).
I eventually left school and gained
an apprenticeship as a radio and TV
technician the year Man walked on the
moon. Unfortunately, with the later
demise of the TV repair industry, I
had to switch trades.
It’s sad that we lost all of the commercial manufacturing of electronics,
TVs, radios etc. I did work at Flexdrive
near Melbourne for a while; they made
electronic speedos, trip computers and
integrated electronics for the automotive industry (all Australian designed
and built). They are gone too.
I remember an article in EA about
Fairchild semiconductor manufacturing in Australia; they’re also gone!
Believe it or not, Dyne is still making
transformers in Melbourne.
I remember Leo Simpson’s articles
and built many projects that interested
me. (T. R., via email)
● EA published several antenna
amplifiers for AM radio. The following
was taken from the index: siliconchip.
au/Static/EA%20Projects
• 2/AE/48 Low Cost Booster for AM
Reception (antenna) (August 1994)
• 2/AE/49 The ‘Miracle’ AM
Antenna (November 1996)
We have also published the following projects:
• Simple Car Antenna Amplifier
(December 1988 issue; siliconchip.au/
Article/7574)
• Passive Loop Antenna For AM
Radios (June 1989 issue; siliconchip.
au/Article/7458)
• AM Loop Antenna & Amplifier
(October 2007 issue; siliconchip.au/
Article/2398)
• AM Broadcast Band Portable
Loop Antenna (January 2009 issue;
siliconchip.au/Article/1280)
SC
Arduino LC/ESR Meter, August 2023: there are two errors in the wiring
diagram, Fig.3. (1) The wires from A0, A2 & A3 on the shield should go
to A1, A2 & A3 on the Arduino, respectively, not A0, A1 & A2. (2) The
connections to switch S1 for the 10kΩ resistor and grey wire that goes to
the GND terminal on the Arduino should be swapped. The leftmost and
rightmost connections for S1a in Fig.2 should also be swapped.
CD Spot Welder, March & April 2022: in Table 1 on page 28, the
second entry for the 39mF capacitors has the wrong part number/
link to Mouser. It should be https://au.mouser.com/ProductDetail/871B41231A5399M000 (not -002).
Next Issue: the November 2023 issue is due on sale in newsagents by
Thursday, October 26th. Expect postal delivery of subscription copies in
Australia between October 25th and November 13th.
Australia's electronics magazine
siliconchip.com.au
