charging current will flow, slowly charging
the piezo converter. The result is only a
slow, silent deformation. Once the contact
is closed, on the other hand, a sudden
discharge with rapid deformation and a
distinct cracking will occur.
Behind the 9th door you will find a new
resistor with the colours brown, black and
green. It has 1,000 k
Ω
(Kiloohm), so a 1 M
Ω
(Megaohm). This very large resistor provides
a very small current that only slowly charges
the piezo transducer. Open and close the
contact several times. Both LEDs will clearly
flash. But the piezo speaker only produces a
crack when the contact is closed.
Braked current
9
Once again you can also use a wire or other
metal object if the button is too loud. Once
the contact is opened, however, no audible
noise is generated. The reason for this is the
large resistance in the circuit. Only a small
