<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 12pt;
font-family:Calibri
}
--></style></head>
<body class='hmmessage'><div dir='ltr'><pre>Derelict Electronics :: Workshop :: Amplification & Solar Cell ::
Full information ::
<a href="http://ryanjordan.nnnnn.org.uk/doku.php?id=derelict_electronics" target="_blank">http://ryanjordan.nnnnn.org.uk/doku.php?id=derelict_electronics</a>
Workshop day 1... ::: Amplification
-----------------------------------------
In this workshop we will use a mesh of point contacts connecting to
chalcopyrite and iron pyrite to make crude amplifiers out of rocks. When
an electric current is sent through the rocks sporadic noise bursts from
the speakers. With some fine tuning these rocks begin to behave like
microphones, amplifying howling feedback and detecting subtle scratches
and disturbances in their surrounding environment. Occasionally the
circuit exhibits visual output coinciding with the audible in the form of
small sparks and minute explosions occurring where the copper point
contacts meet the surface of the rock.
This crude amplifier is based on the Adams Crystal Amplifier 1933, a
precursor to the modern transistor, one of the fundamental building blocks
of today's electronic and digital world. On the Sunday evening there will
be a free public event where participants will perform and present what
they have made.
Workshop day 2... ::: Solar Cell
--------------------------------------
A very crude, home made solar cell using copper and copper oxide. Photons
land on the metal plate of the solar cell and this causes electrons to
eject. Electrons are able then to pass from the copper oxide to the copper
resulting in a fluctuation of energy(?) in the solar cell which can be
measured and if connected to an amplifier and loud speakers it can be
perceived audibly as a pulse or “bang” of sound. A light signal has been
converted to sound and is perceived as a simultaneous and completely
synchronised audiovisual signal.
This crude solar cell is based on Wilhelm Hallwachs (1904)
semiconductor-junction solar cell. Hallwachs' experiments laid the
foundation for the modern day photoelectric cell.
Date... :::
-----------
Saturday 24th & Sunday 25th August 2013
12midday - 6pm Saturday and Sunday
6pm-8pm Sunday - Public performances/presentations
Cost... :::
-----------
£60 / £50 conc. Includes all equipment and materials. Keep what you make.
Places limited to 10 participants.
To reserve a place email <a href="http://webmail.nnnnn.org.uk/cpsess5080644504/3rdparty/squirrelmail/src/compose.php?send_to=ryan%40nnnnn.org.uk">ryan@nnnnn.org.uk</a>
Location... :::
---------------
nnnnn, Unit 73a, Regent Studios, 8 Andrew's Road, London, E8 4QN
<a href="http://nnnnn.org.uk/" target="_blank">http://nnnnn.org.uk/</a></pre> </div></body>
</html>