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image019
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SAMSUNG-SGH-I337
2/20/2015 12:29:52 PM
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QPD2008 Motorized Speaker
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Image075
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2/27/2015 9:56:31 PM
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These
speakers stay flush to the ceiling when not in use or are being used for
background music.
When
used for home theater, they receive a signal which tells them to deploy and
drop down into a more appropriate listening position where they are aimed
at the listening position.
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qpd_ctrl_pcb_asm
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2/27/2015 9:35:18 PM
This is a SolidWorks model of a printed circuit board that I
designed which provides the required 12vdc constant power to the speakers
and can receive either a 12v old or 120 volt signal from a surround sound
amplifier. When this signal is received the board send
a 12vdc control signal to each speaker telling ti
to deploy. When this control signal is not present the board removes the
control voltage from each speaker causing it to retract.
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20150302_015813
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SAMSUNG-SGH-I337
3/2/2015 1:58:12 AM
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This is an assembled but not soldered prototype of
the board that I cnc machined. I didn't have any single sided 1/16” board
so I used a piece of 0.070” double sided then machined off the top layer of
copper to make the prototype for testing.
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QPD_2008_Control_Box_ASM-1
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3/2/2015 1:05:00 AM
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I designed up this enclosure to mount the PCB in so that
it can be mounted to the wall up in the attic to control the speakers. I
will use some 3 conductor cable to wire each speaker to the control box
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20150302_011402
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SAMSUNG-SGH-I337
3/2/2015 1:14:02 AM
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This is
the actual 3d printed enclosure.
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20150302_011540
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SAMSUNG-SGH-I337
3/2/2015 1:15:39 AM
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I'm using one ac power inlet to provide switched and
fused AC to the internal 12 VDC 4A power supply that provides the constant
12v to each individual speaker.
The second AC input module is used to connect the
Receivers auxiliary AC outlet to the speaker control board to signal the
speakers to deploy.
There is also a 12vdc trigger input available for remote
control also.
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QPD_2008_Control_Box_ASM-2
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3/2/2015 1:05:00 AM
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Another
3D model view of the Phoenix contact pluggable screw connectors used to
connect the control cables.
The 2
pin Phoenix connector id for the 12v Trigger from the Receiver or home
automation system.
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20150302_011409
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SAMSUNG-SGH-I337
3/2/2015 1:14:08 AM
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A shot of the actual 3d printed enclosure with the
assembled PCB inside.
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20150302_011528
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SAMSUNG-SGH-I337
3/2/2015 1:15:28 AM
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Close up
of the lettering on the top cover. I ran out of time but would like to have
added a more detailed legend to the lower case showing the actual wiring
list. I may just use the CNC to engrave this on the lower case.
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QPD_2008_Control_Box_ASM-10
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3/2/2015 1:05:00 AM
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QPD_2008_Control_Box_ASM-11
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3/2/2015 1:05:00 AM
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QPD_2008_Control_Box_ASM-3
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3/2/2015 1:05:00 AM
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20150302_012517
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SAMSUNG-SGH-I337
3/2/2015 1:25:16 AM
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Fuses
are on order. The speakers require ½ amp fuses. I need to measure the
control leg to see how much current all of the speakers want, I suspect
this current to be very low but will have to measure it to know for sure.
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20150302_012552
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SAMSUNG-SGH-I337
3/2/2015 1:25:51 AM
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20150302_015745
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SAMSUNG-SGH-I337
3/2/2015 1:57:44 AM
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All
components and jumpers soldered to the PCB. I hate this No Clean lead free
solder
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QPD_2008_Control_Box_ASM-9
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3/2/2015 1:05:00 AM
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Solid model of the top cover and the lettering.
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20150302_011441
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SAMSUNG-SGH-I337
3/2/2015 1:14:40 AM
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Close up
of the top cover lettering. I didn’t leave the part in the washer quite
long enough because there is some support material in some of the
lettering.
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QPD_2008_Control_Box_ASM-8
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3/2/2015 1:05:00 AM
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20150302_012446
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SAMSUNG-SGH-I337
3/2/2015 1:24:46 AM
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QPD_2008_Control_Box_ASM-7
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3/2/2015 1:05:00 AM
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QPD_2008_Control_Box_ASM-6
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3/2/2015 1:05:00 AM
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I made
provisions to screw a 3D printed cage over the power supply but opted to
use some 1/16” thick foam tape to adhere the power supply to the bottom
cover.
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20150302_011043
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SAMSUNG-SGH-I337
3/2/2015 1:10:43 AM
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QPD_2008_Control_Box_ASM-4
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3/2/2015 1:05:00 AM
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20150302_011050
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SAMSUNG-SGH-I337
3/2/2015 1:10:49 AM
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20150302_012635
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SAMSUNG-SGH-I337
3/2/2015 1:26:34 AM
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Here you
can see how the power supply fits into the bottom of the case and the wire
routing up to the PCB. Phoenix Pluggable connectors are used to connect the
leads to the PCB. Other than the double faced tape, replacement of the power
supply should be easy if the need arises.
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QPD_2008_Control_Box_ASM-5
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3/2/2015 1:05:00 AM
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20150302_012643
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SAMSUNG-SGH-I337
3/2/2015 1:26:43 AM
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This
shot shows the power supply connected to the PCB. These supplies are
inexpensive, efficient and available in many current and voltage
capabilities.
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20150227_173007
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Here are some shots of machining
(isolating) the traces on the mill. I am using a 3/32” 2 flute drill mill
for the engraving. It is sufficient for this rudimentary PCB but wouldn't
work very well if the traces were significantly smaller.
Doing it this way saves
a bunch of hand wiring if I were to prototype it in the conventional
manner. Plus, if I ever need to build more, it will really pay off having
a PCB, even if its a
DIY version.
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20150227_173121
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I was too
lazy and in a hurry to setup the different drills so I just used a 1/32” carbide end mill to interpolate all of the
holes. This increased the machining time slightly but saved time finding
and setting up different drill bits.
The whole machining operation took less than 20
minutes.
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20150227_173124
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SAMSUNG-SGH-I337
2/27/2015 5:31:24 PM
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20150227_173128
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SAMSUNG-SGH-I337
2/27/2015 5:31:28 PM
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20150227_211235
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SAMSUNG-SGH-I337
2/27/2015 9:12:35 PM
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20150227_211249
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SAMSUNG-SGH-I337
2/27/2015 9:12:49 PM
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20150227_211310
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SAMSUNG-SGH-I337
2/27/2015 9:13:09 PM
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20150227_211327
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SAMSUNG-SGH-I337
2/27/2015 9:13:27 PM
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20150227_211351
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SAMSUNG-SGH-I337
2/27/2015 9:13:51 PM
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20150227_211403
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SAMSUNG-SGH-I337
2/27/2015 9:14:03 PM
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20150227_211419
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SAMSUNG-SGH-I337
2/27/2015 9:14:18 PM
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This is an assembled
(less jumpers) but not soldered prototype of the board that I cnc machined.
I didn't have any single sided 1/16” board so I used a piece of 0.070”
double sided then machined off the top layer of copper to make the
prototype for testing.
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20150302_015806
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SAMSUNG-SGH-I337
3/2/2015 1:58:06 AM
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Jumpers
installed
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20150302_015759
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SAMSUNG-SGH-I337
3/2/2015 1:57:58 AM
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Soldered
connections. Note the isolated areas around the mounting screws incase the
board is mounted into a conductive metal housing with metal standoffs, the PCB will be electrically isolated from
the chassis.
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20150302_015755
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SAMSUNG-SGH-I337
3/2/2015 1:57:54 AM
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20150302_015748
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SAMSUNG-SGH-I337
3/2/2015 1:57:48 AM
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20150302_015819
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SAMSUNG-SGH-I337
3/2/2015 1:58:18 AM
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20150227_211228
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SAMSUNG-SGH-I337
2/27/2015 9:12:28 PM
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20150227_211338
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SAMSUNG-SGH-I337
2/27/2015 9:13:38 PM
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20150227_211343
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SAMSUNG-SGH-I337
2/27/2015 9:13:42 PM
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20150302_011422
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SAMSUNG-SGH-I337
3/2/2015 1:14:22 AM
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20150302_012510
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SAMSUNG-SGH-I337
3/2/2015 1:25:09 AM
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This is the completed PCB assembly installed into the
enclosure ready for testing once I have the fuses.
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20150302_012538
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SAMSUNG-SGH-I337
3/2/2015 1:25:38 AM
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In the
upper middle you can see a
6-32 SEMS
screw that holds the PCB to the lower cover. This is so that when the
control is mounted vertically in use you will be able to remove the 4
screws holding the lid on and not have the PCB fall out while you are
trying to service it.
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20150302_012608
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SAMSUNG-SGH-I337
3/2/2015 1:26:08 AM
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This is the enclosure 6-32 hardware.
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20150302_012655
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SAMSUNG-SGH-I337
3/2/2015 1:26:55 AM
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A shot
of the lower 3D printed enclosure.
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20150302_012711
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SAMSUNG-SGH-I337
3/2/2015 1:27:11 AM
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20150302_012734
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SAMSUNG-SGH-I337
3/2/2015 1:27:33 AM
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20150302_012859
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SAMSUNG-SGH-I337
3/2/2015 1:28:59 AM
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Installation of the double faced tape on the bottom of
the power supply.
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qpd20082
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2/27/2015 9:56:56 PM
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More
images of the speaker.
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