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This is an open hardware project based on the Michael Peshkin Lightboard from Northwestern University:

https://sites.google.com/site/northwesternlightboard/

Concept

A simple design that allows a lecturer presenting to a camera to write as they would on a white board but facing students.  This eliminates the need for complicated computer generated graphics. 

Differences between the Duke Lightboard and the original Peshkin lightboard

The Duke Lightboard focuses on smaller, lighter construction the goal of elminate the need for many studio accessories.  As a result, the design is somewhat portable and reduces the need for complicated lighting arrangements.  The three key technical elements are the use of an electronic "flipper" to mirror the video, the use of a custom designed LED clip, and the exclusive use of bolt-together 80/20 aluminum framing as opposed to a welded steel frame. 

The electronic flipper processes the reversed image as opposed to shooting the camera through an actual physical mirror as spec'ed in the original design.  This eliminates complication and geometry from the design as well as increasing the light input to the camera.  The LED Clip is also a key element.  The design holds cheap 3528 sized LED's on standard 8mm strips precisely up to the glass.  The design is extremely light and includes framing for a second LED strip that can illuminate the face of the lecturer without the need for industrial studio lighting.  The second Subject LED Strip is set to a warm 3000K temperature which is more appropriate for human skin.  The clip can be reproduced using simple extruding or 3D printing technologies.  The use of 80/20 components considerably reduces the weight of the final product while making it easier for someone who does not have access to a welder or other metal working equipment.

Bill of Goods for Desktop (3'x2') Lightboard

Standard Fabrication Components
ItemQntyEst. Cost Link
80/20 - 24" 15 Series sections2  http://www.amazon.com/80-20-SERIES-T-SLOTTED-EXTRUSION/dp/B001F0F14E/
80/20 - 36" 15 Series sections4  http://www.amazon.com/80-20-SERIES-T-SLOTTED-EXTRUSION/dp/B00BL104NU/
80/20 - Inside Gusset4  http://www.amazon.com/80-20-Series-4-HOLE-INSIDE/dp/B001IA12YE
80/20 - 7-Hole Tee Joining Plate2  http://www.amazon.com/80-20-Series-5-HOLE-JOINING/dp/B001IA4PQ6/
80/20 - Leveling Feet4  http://www.amazon.com/80-20-Inc-Series-Leveling/dp/B006YVZ04A/
80/20 - Inside Corner Brackets4  http://www.amazon.com/80-20-Series-2-HOLE-BRACKET/dp/B001IA4Q7Y
80/20 - 5/16 Button Head Bolts30   
80/20 - 5/16 T-Nuts30   
60 watt power supply1  http://www.amazon.com/LEDwholesalers-Waterproof-Transformer-3-prong-3204/dp/B003WOIVRU/
8mm - 5m 6000K 3528 8mm LED Strip1  http://www.amazon.com/HitLights-Density-Flexible-Adapter-included/dp/B005ST2I9O/
8mm - 5m 3000K 3528 8mm LED Strip1  http://www.amazon.com/HitLights-White-Double-Density-Flexible/dp/B00710K0DE/
LED Strip Connector2  http://www.amazon.com/dp/B00JJ4SRSA/
Custom Fabrication Components
LED Clips24$5.99 http://www.thingiverse.com/thing:307144
1/4 Tempered Glass    
     
     
     

 

Bill of Goods for Desktop (6'x4') Lightboard

Standard Components
ItemQntyCost PerCost TotalLink
80/20 - 72" 15 Series sections6$40.11$240.66http://www.amazon.com/80-20-SERIES-T-SLOTTED-EXTRUSION/dp/B001F0I3FI
80/20 - 24" 15 Series sections2$14.67$29.34http://www.amazon.com/80-20-SERIES-T-SLOTTED-EXTRUSION/dp/B001F0F14E/
80/20 - 24" 15 Series sections2$21.03$42.06http://www.amazon.com/dp/B00BL104NU/
80/20 - 5-Hole Tee Joining Plate4 $31.20http://www.amazon.com/dp/B001IA4PQ6
80/20 Inside Corner Bracket2$2.95 http://www.amazon.com/dp/B001IA4Q7Y/
80/20 - 45 Degree 15 Series Support2 $47.00http://www.amazon.com/dp/B006YVZ4UU/
80/20 - Caster Mount4 $74.60www.amazon.com/dp/B00J0934RI/
80/20 - Casters4 $124.00http://www.amazon.com/dp/B006YVZ2IO/
8mm - 5m 6000K 3528 8mm LED Strip2$22.95$45.90http://www.amazon.com/dp/B005ST2I9O/
8mm - 5m 3000K 3528 8mm LED Strip2$22.95

$45.90

http://www.amazon.com/dp/B00710K0DE/
LED Clips24$5.99 http://www.thingiverse.com/thing:307144
Dimmer4$2.99$12.96http://www.amazon.com/dp/B003L4KKF2/
     
150 Watt DC Power Supply1$68.00$68.00http://www.amazon.com/dp/B00IHZ9ME0/
Terminal Block1$7.99$7.99http://www.amazon.com/dp/B0055HOK7C/
Total  
Custom Fabrication Components
3/8 Low Iron Tempered Glass1$1026.89$1026.89 
     
     
     
Fuse block2$2.25 www.amazon.com/Fuse-Block-Full-Molded-3AG/dp/B00E3X6MGQ/

Studio Lightboard Power Consumption

Light ArrayPer LegArray Total
Top33.8 watts101.4 watts
Left21.75 watts65.25 watts
Right21.75 watts65.25 watts
Bottom  
Total231.9 watts

 

 

Cleaning Methodology

  • Wipe Lightboard clean with a traditional whiteboard eraser
  • White residual power from Lightboard with a clean, dry paper towel
  • Use a thin mixture of Dawn dish detergent in a spray bottle and mist the surface of the glass
  • Use a squeegee to wipe the cleaner off

 

 

 

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