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*Fresnel Lens Solar Beam: http://www.youtube.com/watch?v=9RUF_g9nrTY&NR=1 | *Fresnel Lens Solar Beam: http://www.youtube.com/watch?v=9RUF_g9nrTY&NR=1 | ||
*Sulfur Plasma Light (made with microwaves!): http://www.plasma-i.com/sulphur-plasma-light.htm | *Sulfur Plasma Light (made with microwaves!): http://www.plasma-i.com/sulphur-plasma-light.htm | ||
*Original Specs for 60" searchlights: http://www.reocities.com/bobz299/searchlight3.htm | |||
[[Image:Mangin.jpg]] [[Image:ParaLight.jpg]] [[Image:Jolin.jpg]] [[Image:LeverCarbonArcLamp.jpg]] | [[Image:Mangin.jpg]] [[Image:ParaLight.jpg]] [[Image:Jolin.jpg]] [[Image:LeverCarbonArcLamp.jpg]] | ||
[[Category:Projects]] | [[Category:Projects]] |
Latest revision as of 16:16, 28 January 2011
The HackSignal - HackPGH's "bat signal" equivalent out of common household parts
Goal: To build an extremely high powered mostly coherent light source to display cutout images on clouds.
Master ToDo
- Source Carbon Rods
- Carbon Gouging Rods for Arc Gouging (1/4")
- Decide on/Source Materials for Parabola
- Aluminum Flashing - but how to join it together?
- Pop Rivets?
- Chrome Tape?
- Aluminum Flashing - but how to join it together?
Get a Garbage CanDone.- Build power system
- High Amperage, lowish (50-60V) voltage
- As much amperage as possible, lowish voltage.
- High Amperage, lowish (50-60V) voltage
- Build arc PD controller
- Coils and a spring - see the light source section below.
- Source the mounting system, or make a mechanical design.
- Build parabola
- Plans below - need to decide between the two styles.
- Solve the first style for a 20" wide mouth, 10" deep focal point. Would love some help with this!
Mount systemDone.- Reinforce mounts with angled pieces to form triangles.
- Test and refine (Kickstart for more funds?)
- Build cutouts (HackPGH logo, others?)
- Play with device
Hardware
Light Source: Carbon Arc!
- We are totally making one of these PD controllers for arc lamps: http://chestofbooks.com/crafts/popular-mechanics/Amateur-Work-4/Principles-Of-Arc-Lamp-Construction.html
- Small Change - horizontally mounted carbons with a spring to simulate gravity (providing an I - making it a PID).
- Other Arc Lamp Hacks: http://members.misty.com/don/carbarc.html
- Rod Data: http://www.boyocarbon.com/pro-air%20arc%20gouging%20carbon%20rod-e.htm
Power System: Unknown!
- We need the equivalent system of an arc welder.
- High Amperage, not High Voltage?
- Higher Amps - Larger Rods!
- Data on one system: http://einhornpress.com/DIYSpotlighttoSearchlight.aspx
Reflector: Parabola!
- How to Make Big Paraboloids out of flat segments: http://freespace.virgin.net/ljmayes.mal/var/parabola.htm
- Another method of the above: http://ashokk_3.tripod.com/srinivasan.htm
- How to Make a Parabolic Mirror: http://www.ehow.com/how_4612737_parabolic-mirror.html
- Monster Reflector: http://www.candlepowerforums.com/vb/showthread.php?243779-50-inch-Reflector-quot-Monster-Light-quot
- An even EASIER method from Jason Price:
its easy.. Coriolis effect... Build a turntable and get a liquid resin. Test it with water to get the curve you want, then remember the RPM setting. Replace water with clear resin and allow to dry... Used it before but froze the water to make an ice lens. :-)
Links: Light Design!
- The post that started the idea: http://benkrasnow.blogspot.com/2010/10/diy-searchlight-housing-for-1000w-xenon.html
- A 1914 paper on searchlight design: http://www.google.com/url?sa=t&source=web&cd=14&ved=0CDMQFjADOAo&url=http%3A%2F%2Fiopscience.iop.org%2F1475-4878%2F15%2F1%2F308%2Fpdf%2Ftov15i1p216.pdf&rct=j&q=design%20of%20large%20searchlight&ei=GfH_TP_fKMOC8ga4m-TvBw&usg=AFQjCNH8FQetgmoWmjr_Prv4bLkuUGUUyA&cad=rja
- CandlePower Forums: http://www.candlepowerforums.com/vb/forum.php
- SkyTracker Instructional Manual: http://lighting.ballantyne-omaha.com/DisplayFileObjects.aspx?i=317bb4c1-7f9c-4e15-9264-9021c6b271fa
- Arclight Discussions: http://www.candlepowerforums.com/vb/showthread.php?304040-Mega-Blaster-My-first-short-arc-mod-MegaRay-style
- Big Lights: http://www.candlepowerforums.com/vb/showthread.php?198582-The-BIG-Lights
- Fresnel Lens Solar Beam: http://www.youtube.com/watch?v=9RUF_g9nrTY&NR=1
- Sulfur Plasma Light (made with microwaves!): http://www.plasma-i.com/sulphur-plasma-light.htm
- Original Specs for 60" searchlights: http://www.reocities.com/bobz299/searchlight3.htm