Yes, that site is one of my inspirations.

On Sat, Dec 27, 2014 at 7:59 PM, RussellMc <apptechnz@gmail.com> wrote:

> I just serendipitised onto this site almost 10 months after raving about =
it
> at length - see below.
> This time I found it via a search on the term      "coherer" and as I did
> not mention it on the last pass, and as the site is every bit as amazing =
as
> before. I'll shout its worth yet again.
>
> For young people - especially teenages, this page could be life changing.
> Needs adult oversight - some of these devices are seriously awesome.
>
> FLAME (yes, fire) Triode amplifiers, DIY from raw materials semiconductor=
s
> and circuits built using them , magnetic amplifiers, TEA LAsers, unpowere=
d
> flying machines, .... AND coherers, including one built from two lengths =
of
> wire and a hole in a workbench containing filings from a bolt.
>
> As noted before - very few of these products are of practical value when
> compared to readily avail;able modern implementations, but seeing the
> underlying principles implemented with 'everyday stuff' should open up a
> few mental filters. There's enough here to inspire some children towards =
a
> life of science or engineering. Run ... !  And enough stuff to re-remind
> old minds of the wonders underneath everyday products.
>
> Very highly recommended.
>
>
>
>                   Russell
>
>
>
>
> On 6 February 2014 at 13:52, RussellMc <apptechnz@gmail.com> wrote:
>
> > The most genuinely DIY electronics site I've ever seen - utterly
> > astounding.
> > Also utterly superb, but one mustn't put too many utterlys in the subje=
ct
> > line.
> >
> > This is among the top few most amazing* websites I have ever seen.
> > As  a starter introduction to young scientists / engineers and as a mea=
ns
> > of opening mental filters for the old and seen-it-all I've probably nev=
er
> > seen better.
> > Astounding.
> >
> >
> > *       http://www <http://www>.sparkbangbuzz.com/ *
> >
> >                   Ref from James Newton.
> >
> > * Amazing rather than highly practical in most cases. As you'd expect, =
a
> > transistor made from a piece of galvanised steel is probably going to b=
e
> > vastly inferior by almost any technical measure to a commercial product
> > costing a few cents.  But demonstrating both that you CAN do it and HOW
> top
> > do it is priceless.
> >
> >
> > DIY transistors - from raw materials - and raw materials that few have
> > ever heard of in these roles.
> >
> > Semiconductor devices starting with galvanised iron sheet. Really!
> >
> > DIY tunnel diode equivalent.
> >
> > DIY FET
> >
> > FLAME amplifier (yes, the hot manifestation of combustion)
> > Dual triode flame audio amplifier.
> >
> > DIY 40 metre transmitter based on DIY semiconductor :-).
> > Output is about 50 microwatts - but
> >
> > DIY memristor
> >
> > Thermocouples - std copper/steel, but also Cu/Cu using oxide layer.
> > Light an LED from output from N series connected (energy efficiency
> > terrible)
> >
> > Levitation using static charge.
> > Vastly greater levitation distances than anything I've seen using other
> > methods - 1 metre plus.
> >
> > Corona amplifer
> >
> > Borax rectifier
> >
> > DIY CRTs !!!!!!!!!!!!!!!!!!
> >
> > DIY T.E.A. LASER
> > Easier to make than cookies (he says)
> >
> >
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