Data Sheet
-104-
224. Moore’s Law
Replace the switch (62) with the press switch (61) in project #213.
Press the press switch (61) and you will hear the siren from the speaker
(93). The 3-in-1 module (11) has an IC in it which is more complicated
to provide various sounds. The complexity of what needs to go on ICs
continues to grow every year. Fortunately, semiconductor technology
has been able to advance at a fast rate too. Moore’s Law saws that
microchips double in power every 18 to 24 months.
225. Sound Recording and Reproduction
Replace the switch (62) with the press switch (61) in project #213.
Place a 4-wire (4) across points C and D and when you press the press
switch (61) you will hear a gun shot and machine gun sounds. Sound
recording and reproduction is used to reproduce the sounds you hear
from the speaker.
226. Types of Sound Recording and Reproduction
Replace the switch (62) with the press switch (61) in project #213.
Place a 4-wire (4) across points A and B and when you press the press
switch (61) you will hear the sound of an emergency re siren. There
are two types of sound recording and reproduction: analog and digital.
227. Analog Recording and Reproduction
Replace the switch (62) with the press switch (61) in project #213.
Place a 4-wire (4) across points E and F and when you press the press
switch (61) you will hear space battle sounds. Analog recording uses
a microphone that records the acoustic sound waves on either a
phonograph record or magnetic tape. Analog reproduction then uses a
speaker to reproduce the sound waves recorded.
228. Digital Recording and Reproduction
Replace the switch (62) with the press switch (61) in project #213.
Place a 4-wire (4) across points G and H and when you press the press
switch (61) you will hear music. Digital recording converts the analog
sound waves picked up on a microphone to a digital signal represented
by 1s and 0s. These 1s and 0s can be stored in memory on any type
of storage device and then retrieved and used to recreate the analog
signal.
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