I started this project because my Panasonic AE700u had a 12v trigger output for a projector screen and because there was no place to hang a screen on the wall. One end of the living room inour 1863 cottage had a doorway and the other had a 6' tall window in the middle. So I built the device below to make the screen rise up from below instead.
The screen is driven by an AC motor and has a separate cord going to my electronics rack.
Relays turn the motor on and reverse the polarity for up and down.
Limit switches turn it off when fully extended or retracted.
Halfway through the project I upgraded to a Panasonic AX100. Turns out that the AX100 did not have a 12v trigger, so I got a wall transformer/charger and plugged it into a switched outlet on my entertainment rack. Now when I turn on the entertainment rack the screen raises and when I turn it off, it lowers to a hidden location in the credenza device.
Caution, if you have a Panasonic AE700, you have to build this additional circuitry in order to drive the relays that run the screen up and down. See this post.
1) Under construction :
Lincoln Towncar seatback aparatus driven by refrigerator motor (right edge)
raises arm attached to X shaped screen supports.
File drawer tracks on bottom allow support bottoms to come together as they
2) White projector screen lies on desk prior to mounting upside-down
Closet door roller track then riveted to the screen's pull tube.
Roller cars with white wheels then attached to top ends of supports.
3) Apparatus front is covered by a 10" plank. Legs and trim added, painted and installed against the living room wall.
4) Stereo system started by remote, screen begins to rise.
5) Screen continues to rise to 4 1/2 feet tall.
6 ) Watching King Kong from about 14 feet away. You can faintly see the device below.
6 ) Watching Wind.
Wife approves of "Monster Screen" (her words)!!
Not sure where to post this so maybe I'll put it in some other forums here.
Edited by pmacafee - 2/16/13 at 4:52am