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Author Topic: Faking a copier strobe with a standalone SCSI scanner?
dragonman97

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Icon 1 posted April 17, 2006 13:06      Profile for dragonman97   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
I don't really expect anyone to be terribly interested...but the person who asked seemed nice, and I thought I'd try and get an answer. Someone asked me if I could lend them a scanner to emulate a copier for the sake of a theatre production - I found a clunker of an HP Scanjet, and it does start up, but the strobe doesn't travel unless it's hooked up to a computer (which I've not even tried yet). Any suggestions for a very quick & dirty way to make something of this?

Thanks in advance,
dragon

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Posts: 9332 | From: Westchester County, New York | Registered: May 2001  |  IP: Logged
Grummash

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Icon 1 posted April 17, 2006 13:46      Profile for Grummash     Send New Private Message       Edit/Delete Post   Reply With Quote 
dragonman97

Just a thought, but would it be easier to go low-tech for the mock-up copier? How about something like this:
- rig up a bright, fixed lamp in the scanner body ( or other similar beige box)controlled by an push-on/push-off switch
- contrive a mask with a full-width (or almost) slit, which can be moved side-to-side with a manual slider
- the "copier" is then activated by the actor pushing the button, as you would expect, and also a little basic legerdemain to "swoosh" the copier light from side to side.

Of course, this may be a stoopid idea. [Big Grin]

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Posts: 2335 | From: Lancashire,UK | Registered: Aug 2005  |  IP: Logged
dragonman97

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Icon 1 posted April 17, 2006 14:13      Profile for dragonman97   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
That's a perfectly good idea. [Smile]

I think I killed the scanner, and your idea might be really good now. [Wink]

I untwisted a paperclip, and bent it to make a nice bridge, wrapping it with a number of handy rubber bands, and started to bridge a handful of the SCSI pins...I could only get it to reinitialize - which doesn't go more than a few mm on this. My old Epson would probably go the whole length and back - I might try and find that....I'm certainly not using it, and I think the backlight is failing (such that it's not scanning properly, but still visible)...and I have access to a much better Epson scanner these days.

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Posts: 9332 | From: Westchester County, New York | Registered: May 2001  |  IP: Logged
The Famous Druid

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Icon 1 posted April 17, 2006 15:08      Profile for The Famous Druid     Send New Private Message       Edit/Delete Post   Reply With Quote 
Grummash, you've missed your vocation, you should be working in the theatre.
/me used to work in theatre technology, and it's amazing how primitive and jury-rigged some of the really impressive effects are.

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GrumpySteen

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Icon 1 posted April 17, 2006 17:55      Profile for GrumpySteen     Send New Private Message       Edit/Delete Post   Reply With Quote 
Without the model I can't be sure, but most likely the motor that drives the scanner is a stepper motor. You could build a small circuit to provide a square wave to drive it, then use a contact switche hot glued inside as a limit switch to kill the power when it got to the other side of the sweep.

Does it need to automatically reset and keep going back and forth? That wouldn't be much harder.

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Grummash

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Icon 1 posted April 18, 2006 12:18      Profile for Grummash     Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
Originally posted by The Famous Druid:
Grummash, you've missed your vocation, you should be working in the theatre.

You're too kind. [Smile]

I did have a brief flirtation with the AmDrams back in college days. Some of the props we built would make Heath Robinson laugh out loud. For example, our production of Salad Days had the all-important Magic Piano built from a pram frame, half-a-dozen large cardboard boxes and a few yards of veneer-effect sticky backed plastic. [Big Grin]

And you should have seen the lampost we built for me to loiter underneath whilst singing "On the street where you live" in My Fair Lady - that was like no other lampost before or since!

"It should be me up there, luvvie."

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...and yet, across the gulf of space, minds immeasurably superior to ours regarded this earth with envious eyes...

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tweety
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Icon 1 posted April 19, 2006 20:43      Profile for tweety   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
Funny, all this talk of theater has brought back some memories of my college days. One of the plays I was in required a stream on stage. Which was fine, we made a stream bed, waterproof, of course. But, the theater we were in had a problem with the windows, they weren't closed the night before the show, nor would they close. Oh, and this was in February, in Champaign-Urbana (Chambana). And, yeah, I had to lay down, on my back, along side the "stream", which seemed to somehow spill nicely chilled water onto the stage floor. Refreshing. Certainly knew I was alive. Unfortuantely, I couldn't mask my shock at the lack of warmth from the water. Oh, almost forget, we did 3 shows in two days, so the first night I got to have a cold bath twice. At least the audience laughed.

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