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Craftsman digital torpedo level idea

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#1 CosmoJoe

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Posted 01 January 2013 - 11:46 AM

i have a craftsman digital torpedo level as my altitude SC. However there is a problem, the display is a bright green, but not bright enough to shine through taillight tape. This basically ruins dark adaptation unless I'm diligent about using a eyepatch. so my idea is to buy some glass stain for a couple bucks and stain the display transparent red. does anyone know if this would work? or would it just ruin my level?

#2 Al8236

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Posted 01 January 2013 - 02:03 PM

Why not try some red celophane or rubylith to start, and forgo the stain?

#3 DAVIDG

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Posted 01 January 2013 - 02:16 PM

The LED display has a wavelength output that is in the green so there is very little red light available if any. I would try looking through red transparent plastic to see what level of output you get. Even a clear red candy wrapper will work for a test. You can also look thru a red eyepiece filter at the display and see how visible it.

- Dave

#4 CosmoJoe

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Posted 01 January 2013 - 04:04 PM

good point about the wavelength. If the red does not work, would i be able to use something to just dim it so it doesn't hurt my dark adapt?

#5 DAVIDG

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Posted 01 January 2013 - 05:13 PM

The display is a backlite LCD that uses LEDs for the backlighting. A LCD is polarized so if you get some polarizing plastic film you can rotate it to dim the display. If you have a pair of polarized Sunglasses you can try it out to see how it works.

- Dave

#6 Gary Fuchs

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Posted 01 January 2013 - 05:53 PM

Dave, would what you're suggesting work from any viewing angle?
Thanks,
Gary

#7 DAVIDG

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Posted 01 January 2013 - 06:59 PM

Dave, would what you're suggesting work from any viewing angle?
Thanks,
Gary


Gary,
If you can find plastic that acts like neutral desnity filter then I would try that. Maybe some of the film used to tint car windows. You could also double and triple layer it to get the amount of reduction in brightness that you want.

Happy New Year,
- Dave

#8 AB9MS

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Posted 01 January 2013 - 08:01 PM

How about welders glass?

#9 CosmoJoe

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Posted 01 January 2013 - 11:24 PM

would it be feasible to take apart the level and replace the led's with red ones?

#10 Darenwh

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Posted 03 January 2013 - 09:07 AM

Look at it with polarized glasses and turn the torpedo level to see if the image disappears. If it works, which it should as David suggested, then you can get a polarizing filter for a camera (not a circular polarizer) and a filter ring (empty) of the same size then permamently mount the empty ring and screw the polarizer to it. Now you will be able to turn the polarizer to control the brightness from nearly 100% through put to 0% through put. That will be controlled with only 1/4 turn of the filter.

#11 CosmoJoe

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Posted 03 January 2013 - 11:01 PM

sounds like a good idea. until i get a polarizer to do that i taped my moon filter i don't use to it. it seems to work pretty well. thanks for the idea, and i'm sure others will benefit from that suggestion as well.

#12 Gene7

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Posted 04 January 2013 - 10:33 AM

Get some copper foil. Place a piece of foil-Paper-Foil on one end of the battery with your choice of resistor connecting the two pieces of foil, or run a small pair of wires out to a pot. Gene

#13 Gastrol

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Posted 04 January 2013 - 12:45 PM

Or buy a new digital angle finder that is not back lit. I use a Wixey on my dob.

#14 CosmoJoe

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Posted 04 January 2013 - 01:24 PM

you say the wixey is not backlit huh? i bet i could open my craftsman up and just break the leds

#15 CosmoJoe

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Posted 26 January 2013 - 01:12 AM

i did it. i broke the led's on the craftsman. works like a charm, no blinding light to deal with anymore






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