what about a small magnet in some tubing? that would be easy and cost effective. You can get some nice small magnets out of a CD-ROM drive (the eye)

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small colored buttons?

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Not much different then the colored tacks.

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A short piece of colored shrink tubing over each handle....

 

Hey 3v0, have you mailed the board yet?

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I got a bit behind the 8 ball. Excuse yes. I have 2 of the original version drilled but not etched. If you want I can etch one of them OR behind door number 2 is a new version with better spacing (easier to solder) and 8 charlieplexed LEDs. I can etch the first in a day or two but the new board is will be about a week longer. Your choice.

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Hmm, I guess I'd like the first one. Thanks again!


William

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William Mullaney

"HOPE for the best, EXPECT the worst, ACCEPT whatever comes."

http://wiliamsville.myminicity.com/
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Version 2B includes bulb sensing and 6 charlie plexed LEDs for use as state indicators for debugging.

The PCB was tested with a 16F88 but it should also work with an 18F1320 or 18F1330 but the software will be a bit more difficult. The schematic indicates which signals change.

The attached schematic contains notes about the solder jumpers etc.

Attached Files

	switchboard_sch_2B.pdf (26.1 KB, 66 views)
	switchboard_foil_2B.pdf (35.7 KB, 47 views)
	switchboard_top_reverse_2B.pdf (23.9 KB, 36 views)
	switchboard_top_2B.pdf (24.0 KB, 44 views)

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That's quite the board 3V0, why would the software be more difficult with the 18F? Should actually be easier. Debugging with LEDs is so old school

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Thanks. It should also work as a Simon board. Use push buttons instead of switches.

Debug bits RB 6 & 7 are used by the switches. You can still debug but you have to leave these switches open. It was sort of ugly. Thus the LEDs may come in handy when doing non-debugger testing. Also I think Krumlink wants to use one of these to blink LEDs in his modded CD case.

Only a "bit" more difficult. The LEDs lines are on both PORTA and PORTB for the 18F. Not a big deal, maybe to minor to mention.

If anyone has problems opening the files try right click then open instead of clicking on the link.

One thing I noticed when playing with the box is that it works best in a formal setting where the person on the other side of the box does not feel free to grab the thing and start playing with it. You can loose control of the illusion...

When I showed it to my home school student I was using it in the timeout mode. She grabbed the box and started flicking switches. She opened the box and examined the inside for a while. The box timed out and when she resumed flipping switches it seemed broken. I responded that she had let the magic out of the box when she opened it. I did an incantation over the box, reprogrammed the switches, and handed it back to her. Now she was too old to fall for the mumbo jumbo but it was fun.

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These days I am collecting the hardware for this project. I will assemble a small and a big version. For the bigger one I am looking for old fashioned black lever switches - I know they are sold in China for common 230 volt housing use ( a colleague will send a parcel to me from China). The time until arrival of that parcel will be used to built up a wooden case. With the use of some coax cables (audio cable) I will try to built up a wiring that hides the real wiring - so I try to show all the wiring in a clear perspex case. Of course it should look a little bit antique (like a glass tray) with mahagonny framing.

 

This is actually a principle in magic called "Magicians Choice" and requires that the magician not ask the subject to pick a hand but rather "name" a hand or other object. That way, if the subject 'picks' the hand containing the desired object, it becomes the "one you selected" but if this is the 'wrong hand', it becomes the "one we eliminate". As was correctly pointed out, by not specifying what the magi is going to do makes the outcome completely within his/her control.
This is a great thread and while many magicians would view this as 'exposure', the magic really is in the presentation, not in the clever use of uProcessor power to make it happen.
Doug

 

Will you be posting the software for the chip?

 

Do you mean the code for the magic switchbox project ? Sure. I can not do it right now because I have to hunt it down and make sure it is presentable. Busy with another must get done thing.

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I havnt followed this old thread. Did Blueroom every make this a kit? Can on eof these things be had for cheap?