Hi John.
Yes, it's sad that one gets a late start - my interest began at about age 14 as a ham radio operator.
What caught my eye about the JT was that it introduces the idea of switching which is more fundamental today than in my day. So learning about that at the start is important, especially if someone tricks you into thinking it is supposed to be easy. :-)
Yes I also prefer sine-waves - and tubes that glow purple.
Tim Hutcheson
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--- In LTspice@..., John Woodgate <jmw@...> wrote:
In message <kkbun5+ctqn@...>, dated Sat, 13 Apr 2013, Tim
<thutches@...> writes:
I just uploaded a another copy of the JT, because I wnat to use it as a
techng aid to introduce a family member to some EE concepts and
LTspice. He just graduated high school and has no exposure but a lot
of interest in electronics.
Too late! You need to start at Grade 2 or earlier. (;-)
So having read the recent thread on the JT, I though it might be an
excellent resource for him as it exposes transistor and switching
theory and a lot of concepts in an easy to understand project that he
can build and use my lab tools to verify the expected behavior.
It may be me, but I don't find non-linear oscillators at all simple.
In my posted version, derived from , I
tried to added a second circuit to compare the effects of using a
different transistor than the B549 in the reference article and I
attempted to estimate the Joules being consumed (atfter all it is a
Joule Thief.
If anyone cares to comment on how I might do this better (for the
intended purpose), please do so.
I favour sine-waves and audio frequencies, but we are all different.
--
OOO - Own Opinions Only. See www.jmwa.demon.co.uk
They took me to a specialist burns unit - and made me learn 'To a haggis'.
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
thutches