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Topic: Want to make a 16mm sound changeover box, what is needed?
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 04-28-2002 12:36 PM
As Gordon pointed out, the CX-350 has available a factory changeover box (picture and sound). Incorporated in the changeover box are large loading resistors for the sound.The douser and motor functions appear on the DIN connector on the rear of the unit. Thus, you can make your own picture changeover rather easily with a switch. The Elmo box is rather weird in that it presumes you want a 3-second changeover....thread up 3 seconds prior to where the first picture starts...when you hit the incoming projector start button...3 seconds later..whola. Steve ------------------
"Old projectionists never die, they just changeover!"
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 04-30-2002 08:28 AM
Joe,Yes you can make a switch box like that for the ELMOs. The Aux out jack on the back-left side is at line-level 600 Ohms (mini-phone). It will disconnect the amplifier section but leave the internal speaker to load the amplifier. The volume knob will still work as normal. Thus, you will need to have your switch to select which "Aux Out" jack to play. The picture part will come from the DIN remote connector. I don't have the pin out in front of me but there is one for the douser so you can (with enough poles on the switch) have that also on the same switch. Thus have a single switch changeover. You will still need to start and stop the motors manually like the big boys do but other than that, you might be out $50 or less in parts. Steve ------------------
"Old projectionists never die, they just changeover!"
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Tom Sauter
Expert Film Handler
Posts: 163
From: Buffalo, NY, USA
Registered: Sep 2000
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posted 05-07-2002 03:04 PM
Joe,The pinouts on the remote connector are as follows: Jump pin 1 to pin 8 (this sets remote control mode) Put switches in between the following: 2 and 3 = Lamp On/Off
5 and 3 = Forward/Stop
7 and 5 = Douser Open/Closed To run in remote mode plug in your cable and turn the projector knob to "forward". It will just sit there doin' nothing until you close the circuits.The grounds in this setup are designed so that you MUST run the motor to open the douser. The female connector pins are as follows, looking from the front: TOP
7 6
3 8 1
5 4
2 I know the formatting is weird, but you get the idea.
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