Digital Control Audio Preamplifier and Tone Control - e

Digital Control Audio Preamplifier and Tone Control - e
!"#"$%&'()*$+)&',-.")'/+0%12&"30+'
and Tone Control
Technical Manual Rev 1r0
The Digital Control
!"#$%&'()*+,-$.)(&
and Tone Control kit
contains the basic
functions needed to
build a digitally con/(%--)#&,()*+,-$.)(&
circuit. These functions
includes 4-way input
selector, volume, bass,
and treble control.
It is based on Sanyo’s LC75341 digital control
,()*+,-$.)(&01$,2&!+%34&/1)&#)5$(*6-)&7)*/"()&%7&
this chip is the total separation of control paths
to signal paths. This means, we can contain all
the signal carrying routes within the PCB- signal
comes in and out only on the input and output RCA
jack ports. This contributes to the low noise and
-%8&#$5/%(/$%3&,)(7%(+*30)&%7&/1)&,()*+,-$.)(2
Features
-
0 to +20dB Bass boost control range
+/- 10dB Treble control range
4 input electronic selector
On board signal I/O RCA connectors
Measured Performance:
Test conditions:
Input Level: 0dbV
Digital control circuitry means a controller is needed by the circuit to operate. A user programmable
controller kit specially tailored for this purposeProgrammable Control Panel kit, is available and
can be purchased separately. This is an Arduino
IDE compatible board preloaded with a working
tone control program. If you can program in Arduino, then you have the option to work the source
code further, and reprogram the controller to put in
your own functions and improvements.
Page 1 of 8 pages
THD+N @ 1kHz :
0.015%
100Hz:
0.01%
10KHz:
0.02%
S/N:
108dB at full volume
Noise Floor:
5uV 400hz-30KHz
Crosstalk:
-74dB
Input Overload:
2.96Vrms 1kHz 1% THD
Insertion Loss:
0.89dB
Min Volume:
-95dB
Input select isolation: 108dB @ 1kHz,
-98dB@10KHz
©2012 e-Gizmo Mechatronix Central
!"#"$%&'()*$+)&',+-%./&"0-+
CONNECTORS AND MAJOR PARTS PLACEMENT
INPUT4
INPUT3
INPUT2
OUTPUT
L CH
R CH
INPUT1
P8
P7
D1
P4
P3
P1
P2
P6
POWER
V+
GND INPUT
CE
DI
CL
GND
Vin
P5
CONTROL PORT
LED
POWER INDICATOR
LEFT CH
RIGHT CH
!"#$%&'()'*+&',"#"-./'0$1"2'3%&.45/"6&%'.71'*27&'827-%2/'92.%1'/.:2$-';+2<"7#'-+&'.$1"2'=277&=-2%;'>?80'@.=A;B'.71'1"#"-./'=27-%2/'52%-'=277&=-2%;)'*+&'"75$-'?80'@.=A;'.%&';+2%-&1'-2';"#7./'
#%2$71'<+&7'72-+"7#'";'5/$##&1'"7'"-)
Table 2. P6 Power Input Port
Table 1. P5 Control Port
PIN ID
DESCRIPTION
PIN ID
1
2
3
4
5
Chip Enable
Data Input
Clock
Ground
Tied to P6 V+, Input Power 1018VDC
1
2
CE
DI
CL
GND
Vin
DESCRIPTION
GND Chip Enable
V+
Input Power, +10V-18VDC
For a complete description and programming of
this port, please download the Sanyo LC75341
datasheet.
!"#"$%&'()*$+)&',+-%./&"0-+
©2012 e-Gizmo Mechatronix Central
Page 2 of 8 pages
Page 3 of 8 pages
©2012 e-Gizmo Mechatronix Central
!"!#$%&'()#*(%&+*,$-.%!/,*
!"#$%&'C)'8245/&-&';=+&4.-"='1".#%.4'2D'-+&',"#"-./'827-%2/'0$1"2'3%&.45/"6&%'.71'*27&'827-%2/'A"-)'*+&'="%=$"-'";'9.;&1'27'E.7:2F;'G8HIJK('L8
TO POWER AMPLIFIER INPUT
R CH
L CH
+10-18VDC
GND*
!"#$%&'J)'827-%2/'-2'-+&',"#"-./'827-%2/'0$1"2'3%&.45/"6&%'";'127&'9:';&71"7#'.';&%"&;'2D';:7=+%272$;'9"7.%:'
5$/;&;'-+%2$#+'"-;'=27-%2/'52%-'3I)',&-."/;'2D'-+";'25&%.-"27'=.7'9&'29-."7&1'D%24'G8HIJK(',.-.';+&&-;)'0'
=27-%2//&%';$"-.9/:'9$"/-'D2%'-+";'5$%52;&'";'.M."/.9/&'D2%',LN&%F;'72-'A&&7'"7'12"7#';24&'5%2#%.44"7#'<2%A)'
O$;-'=277&=-'-+&'3%2#%.44.9/&'827-%2/'P"-'.71':2$'.%&'#221'-2'#2)
!"#$%&'K)'&QR"S42'3%2#%.44.9/&'827-%2/'P"-'";'.'
$;&%'5%2#%.44.9/&'0%1$"72'L,T'=245.-"9/&'=27-%2//&%)'L-'";'5%&'/2.1&1'<"-+'-+&'7&=&;;.%:'5%2#%.4'
-2'=27-%2/'-+&'0$1"2'3%&.45/"6&%'P"-)'0'=25:'2D'-+&'
;2$%=&'=21&'";'5%2M"1&1'-2'.//2<':2$'-2'=$;-24"S&'
-+&'827-%2/'P"-U'/"A&'.11'7&<'D$7=-"27;'.71'D&.-$%&;)
!"!#$%&'()#*(%&+*,$-.%!/,*
©2012 e-Gizmo Mechatronix Central
Page 4 of 8 pages
PCB LAYOUT
COMPONENT LAYOUT
COMPONENT SIDE COPPER PATTERN
BOTTOM SIDE COPPER PATTERN
Page 5 of 8 pages
©2012 e-Gizmo Mechatronix Central
!"!#$%&'()#*(%&+*,$-.%!/,*
APPLICATION TIPS
BILL OF MATERIALS
91)&:$4$/*-&!"#$%&'()*+,-$.)(&*3#&9%3)&;%3/(%-&<$/&
exploits the most desirable feature of the LC75341
chip- its digital control capability allowed us to
route the entire signal carrying wires within the
PCB. Not only this approach eliminates bundles of
wires and the work and ugliness associated with it,
it is also responsible for the overall low noise and
)=0)--)3/&9>:&.4"()&8)&*()&4)//$34&7(%+&/1)&<$/2
?%(&6)5/&()5"-/5@&"5)&*&8)--&.-/)()#&,%8)(&5%"(0)@&
4*-A*3$0*--B&$5%-*/)#&7(%+&/1)&,%8)(&*+,-$.)(&
power supply. The kit will work with any single
ended power supply sourcing voltages ranging
from 12VDC to 20VDC @ 100mA.
Like any audio device, this kit demands a thoughtful wiring to prevent it from misbehaving. For
example, a haphazard wiring can easily form a
ground loop, causing the system to produce loud
humming sound, probably completely drowning
out the music it is supposed to reproduce. I wrote
a short article discussing this subject in very short
detail. Spare some time to read it. It can be downloaded using the following link:
http://www.e-gizmo.com/KIT/appnotes/Audio/
FreedomFromHum.pdf
!"!#$%&'()#*(%&+*,$-.%!/,*
| C1
| C2
| C3
| C4
| C5
| C6
| C7
| C8
| C9
| C10
| C11
| C12
| C13
| C14
| C15
| C16
| C17
| C18
| C19
| C20
| C21
| C22
| C23
| D1
| P1
| P2
| P3
| P4
| P5
| P6
| P7
| P8
| R1
| R2
| R3
| R4
| R5
| R6
| R7
| R8
| R9
| U1
| U2
4u7/25V electrolytic
4u7/25V electrolytic
4u7/25V electrolytic
4u7/25V electrolytic
4u7/25V electrolytic
4u7/25V electrolytic
4u7/25V electrolytic
4u7/25V electrolytic
4u7/25V electrolytic
4u7/25V electrolytic
2n7
Box polyester
2n7
Box polyester
220n Box polyester
220n Box polyester
220n Box polyester
220n Box polyester
470uF/16V electrolytic
100nF electrolytic
470uF/16V electrolytic
4u7/25V electrolytic
4u7/25V electrolytic
100u/16V electrolytic
1000u/25V electrolytic
LED Green
DUAL_RCA
DUAL_RCA
DUAL_RCA
DUAL_RCA
5 pins header
2 pins header
RCA
RCA
3k7 1/4W
3k7 1/4W
220 1/4W
220 1/4W
2k2 1/4W
8k2 1/4W
8k2 1/4W
220R 1/4W
1.5K 1/4W
LC75341
LM317 TO-92
©2012 e-Gizmo Mechatronix Central
Page 6 of 8 pages
!"#$%&'V)'!%&W$&7=:'?&;527;&'5/2-'2D'-+&'5%&.45/"6&%'
A"-'<"-+'=27-%2/;'.//';&-'-2'X.-'>Y1ZB)'[2-&'-+&'19';=./&'
2D'Y)YYI1Z\1"M)'*+";'5/2-';+2<;'.71'.45/"-$1&'X.-7&;;'
<"-+"7'Y)YHI1Z'D%24'CY]S'-2'JYP]S)'^&.;$%&1'<"-+'
]3JIVVI0',:7.4"='E"#7./'07./:S&%)
!"#$%&'H)'!%&W$&7=:'%&;527;&'5/2-'<"-+'9.;;'=27-%2/';&-'
-2'_CY1Z'922;-)'*.A"7#'"7-2'=27;"1&%.-"27'-+&'5%&.45'
"7;&%-"27'/2;;'2D'.92$-'(1ZU'-+&'5/2-';+2<;'.'CY1Z'
922;-;'5&.A"7#'.-'.55%2`"4.-&/:'KC]S)
!"#$%&'a)'!%&W$&7=:'%&;527;&'5/2-'<"-+'-%&9/&';&-'=27-%2/'-2'_(Y1Z)
!"#$%&'b)'*%&9/&'=27-%2/';&-'-2'Q(Y'1Z)
Page 7 of 8 pages
©2012 e-Gizmo Mechatronix Central
!"!#$%&'()#*(%&+*,$-.%!/,*
!"#$%&'(Y)'3+.;&'%&;527;&'<"-+'.//'=27-%2/;';&-'-2'X.-'
52;"-"27)'3+.;&';=./&';&-'-2'C'1&#%&&;'5&%'1"M";"27)
!"#$%&'(()'3+.;&'%&;527;&'<"-+'9.;;';&-'-2'_CY1Z'.71'
-%&9/&';&-'-2'_(Y1Z)'3+.;&';=./&';&-'-2'CY'1&#%&&;'5&%'
1"M";"27)
!"!#$%&'()#*(%&+*,$-.%!/,*
©2012 e-Gizmo Mechatronix Central
Page 8 of 8 pages
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising