Instructions

Game and Knowledge in Electronics-Lab
22
A vinyl record is normally played at a certain
speed. But the disc jockey in a disco can
also make a vinyl record rotate more slowly
or faster to change its sound. You can also
do this with the saved sounds. To do this,
select programme B-C. For this project, you
will need the variable resistor and a switch,
which is connected to MI6 this time. You will
also need a cable that selects the desired
sound. At input MI1, the cockerel sound is
played.
Press the button and the cockerel will
call. The variable resistor determines the
playback speed and the tone pitch. You can
continuously change the speed and thereby
create your very own sounds. If you press
the button for longer, your newly created
sound will be repeated in an endless loop.
18
Disco playback
You can also try the other sounds by removing
the cable from MI1 and inserting it into MI2,
MI3 and MI4. For each sound, a different
speed might be best.