has been discontin-
ued. While I thought it was well-written and very good for what it was,
it was not at all congruent with the reasons I enjoy Nuts&Volts. I rely on the
magazine for information about electronics projects and new devices/
circuits. This is not, in my view, what
"In the Trenches" was about — at all!
Please don't let the only electronics
hobby magazine in the US go under
because of non-electronics material!
only complaint I've ever had was the
fuzzball thing and it seemed too petty
for me to complain about it. But now
that it's been changed, I can say “Thank
You.”Keep up the good work. Nuts &
Volts just keeps getting better.
Eric R. Snow
Excellent article by George
Trinkaus on the Mag-Amp. No boring
retoric, excellent easy-to-understand
diagrams, top notch work. A beginner
would have no trouble constructing
one. In case you don't know all the
angles, I use the same process in
some of my positioning indicators.
Figure 1 is a good enough diagram. If
you secure the ferrite stick to your
door, and the coil to the door frame,
you can — with extreme accuracy —
measure how far the door is opened.
Also a tremble switch can be
constructed by connecting the ferrite
stick to a spring when the assembly
is wiggled, a voltage change occurs.
One last thing, the article specifies
115 volts, but the unit will work with
voltages as low as 12, and you can
build them for free!
Overall a perfect article.
South Bend, IN
NO FUZZY LOGIC
I always thought the
"fuzzball" rating system for
projects was out of place in
Nuts & Volts. The plain
circles are much more
appropriate. Nut & Volts is
a great magazine and the
In my March PIC-to-PC communication
article, I made a mistake
in the schematic.
The C7 pin should be
connected to the R2out
pin of the RS232 chip and
the C6 pin should be
connected to the T2in pin.
This is opposite of
the printed schematic. A
corrected schematic is
shown to the right.
— Chuck Hellebuyck
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