Transcript Product Design @ Hope Valley College

Audio Amp
Systems & Control
D ES IGN & TEC H N OL OGY
D es ig n S it u at io n
D es ig n B r ief
Loads of people now own a
personal sound system. These
range from I-pods, MP3 players
and even mobile phones.
However the speakers for the
sound systems can be very
expensive to buy.
Using the TBA 820M audio
amplifier microchip design and
make an audio amplifier that
could be used by students
whilst they are doing their
school work in homework club
or at home.
An al ys is
My product must:
1
2
3
4
5
1K Resistor colour code:
470R Resistor colour code:
1R Resistor colour code:
Resist or s
1. Resistors in SERIES - When resistors are
connected in series, their values are added
together:
R total=R1 +R2
Try these out:
1, R1=500R R2=22k R3=1k
R1= 1k
R2= 1k
2, R1=200R R2=2k2 R3=10k
R3=3k9
3, R1=1k3 R2=3k R3=4k7
For example: 1K+1K+3K9=5K9
Try these out:
(total value)
2. Resistors in PARALLEL -When resistors are
connected in parallel, their total resistance is
given as:
4, R1=300R R2=2k R3=11k
R total =
1, R1=500R R2=22k
2, R1=200R R2=2k2
R1=1k
3, R1=1k3 R2=3k
R2=1k
R total =
R total =
R1 x R2
R1 +R2
1000 x 1000
1000 +1000
500R
PCB Manufacture
R1 = 1K
R2 = 1K
R3 = 1K
R4 = 470R
R5 = 1R
R6 = 470R
C1 = 10 uF
C2 = 150 pF
C3 = 330 uF
C4 = 47 uF
C5 = 1K63 uF polyester
C6 = 330 uF
PCB Layout
Fr ien d s ...
D es ig n 1
1. Comment
Score
What’s good and bad
about your design?
__________ __________
/10
2. Comment
Score
Rev iew...
/10
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How does it meet the
design brief?
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Progress Report
Client:
Designer:
I like…
Possible improvements…
The 3 things that you need to do next are …
2 things I can do if things don ’t go to plan
P r o g r es s Repo r t