This final model implies that the ‘LED-block’ has two tubes; the top one
being slightly larger compared to the bottom one.
– The top one has two holes, through and through. These contain only two
DUO-LEDS and resistances. A duo led is a led which contains two colors,
depending on the direction of the current flow it lights up one of them. This
reduces our possible error rate with 50%! The legs of the two LEDs are moved in
4 directions (90 degrees)
– The bottom tube has one hole, only a few mm deep. It contains a magnet
at the bottom, attracting the metal plate between the rails on the module. Furthermore
has this part notches on the sides.
– When the two parts are glued together piece of contact-sheet for
electronic contacts are soldered on the legs of the LED. Then these are bended
over the edge of the bottom tube. These fit in the notches made for the legs,
and the soldering.
When the ‘led-blocks’ are positioned in the module, they are drawn to
the metal at the bottom between the rails and secured between metal stripes at
the insides of the rails. On the insides of the rails is a piece of cell rubber
placed between the rail and the metal bar for the connection. This makes sure
the ‘led-blocks’ always make contact with the metal outside, due to the spring
resistance of the cell-rubber.
When this was decided, calculations were made on the exact measurements
of all parts. The measurements for the modules are visualized in figure 2.
The PMB already milled one module, however the back was too thin,
whereby the module lost its strength. Figure 2 has a thicker back, and will be
used for requesting information about milling the module from wood. Furthermore
are mails send out requesting information from the professional world about
laser cutting the metal parts needed for contact bars.
When the calculations were done, parts could be ordered online like the
LEDS and magnets, and other parts could be made, like the tubes [figure 3] and
the covers of the ‘LED-blocks’ could be vacuum formed after modeling them with
wood [figure 4].