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The second momentary switch works the same way, but is connected to a DPDT-relay. When metal is touching metal the polarity gets reversed which changes the direction of the attached motors. | The second momentary switch works the same way, but is connected to a DPDT-relay. When metal is touching metal the polarity gets reversed which changes the direction of the attached motors. | ||
== Assignment 3: Final | == Assignment 3: Final assignment/ Morgenflöte== | ||
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'''555 timers, photocells, capactors, resistors, speaker, cardboard tubes''' | '''555 timers, photocells, capactors, resistors, speaker, cardboard tubes''' | ||
The "Morgenflöte | The "Morgenflöte/morning pipe" is a light depended instrument, which is best played in the morning... | ||
[[File:Morgenfloete_summary_.jpg]] | [[File:Morgenfloete_summary_.jpg]] | ||
It uses 2 | It uses 2 or more photocells implemented in the cardboard tubes attached to 2 or more 555 timers in astable mode on a "burning circuit"(it´s getting hot). | ||
[[File:morgenfloete_circuit.jpg]] | |||
<videoflash type="vimeo">134558655|400|265</videoflash> | <videoflash type="vimeo">134558655|400|265</videoflash> | ||