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General FAQ

Q.

Who are you guys and what do you do?


We are the Australian source of Projection Lenses for DIY Projectors. Dream no more. Build your own projector now! The first and only in Australia to support the DIY Projector community.

Q.

Are these lenses suitable for the DIY projectors I've read about on overseas DIY Projection websites?


Absolutely. We find the quality of our lenses absolutely amazing. The lenses are manufactured to ISO 9001 Standards.



Q.

What does it cost to build a projector?

That all depends on how expensive an LCD panel you want, how fancy an enclosure, etc.

However, on average:

  • The cost of your LCD monitor
  • AU$265 for the Pro lenses or $79 for the Std lenses
  • AU$155 for the lamp, holder and ballast, reflector & precon
  • AU$50-100 for the enclosure (which includes hardware like screws, terminals, fan

The key is to keep it simple and accurate. Throw away your rubbish measuring tape and get a steel ruler. Also, many secondhand parts can be used to build this projector, like switches, fans, wiring, screws, nails and even the wood. Ever considered using an old wooden shelf/cupboard as donation for wood? Try to visit electronic 'dump sites' for 'old school' style switches, fuse holders and wiring connectors. Fans are easy to find in old PCs. You can get paint from hardware stores as mistints for cheap.

You will essentially some basic tools:
  • Jigsaw with wood cutting blade
  • Hand wood saw
  • Screwdrivers
  • A Rotary tool (like Dremel, etc) will be useful for rebating, trimming, and recessing
  • Electric/Hand drill (although your Rotary tool can be used)
Remember these tips:
  • Use the LCD monitor for a few weeks to see what you will expect in your projector. Also, if it's new, run it in so as you don't end up having to throw it in the bin or resort to trickery with your warranty when it fails later.
  • Measure twice cut once. Time is what you got...not infinite resources.
  • Avoid using glues or permanent joins. It makes it harder to modify your design.
  • Electricity can be dangerous. Always have the unit unplugged when working on it
  • Tools must be respected. Always use safety gear like eye, ear and breathing protection; some of the wood dust is very toxic!
  • Rome wasn't built in a day. Take your time with this, ie. patience, its meant to be fun not a chore!
  • Most of all, keep dreaming about what it would be like to have this projector when its done. Visit the forums and see what others have done.

Q.

What is the best strategy to minimise freight?


Basically, if you order a kit package, the box is large enough to fit the lamp, reflector, UV shield, ballast and precon. This means, if you are going to place an order, consider bulking it up to reduce your overall freight cost. Avoid the Australia Post basic handling charge by bulk ordering.

Example, ordering a lamp with your lens kit will only cost $0.50 more on the total freight cost!

Q.

What is your freight and handling policy?


At PJOZ.com we endeavour to keep freight (shipping and handling) charges fair for all our customers.

Our mission to further the education of DIY Projectors to ALL Australians and New Zealanders for a start then the world.

To achieve this we use the Australia Post website to provide LIVE price updates to individual parcel freights.

Within Australia

All packages and letters are sent via Australia Post Registered Post or Express Post. We can send it without Registered Post however if they are lost, that few dollars you didn't spend to protect your investment will be the source of your grief. We DO NOT replace packages that are NOT sent via Registered Post. That is our policy.

All packages will have a tracking number if sent via Registered Post.

Ouside Australia

We use Australia Post Registered Post International for all our overseas transactions. Again, we do not insure packages that are not sent in this manner. That is our policy.

Q.

Why is there a list of suitable LCD Panels and what is a FFC?


FFC stands for Flat Flexible Cable. This cable is present in some LCD panels which is used to connect the LCD panel to the controller board. An issue arises when the FFC runs over the 'light path' of the panel. We are progressively compiling a list of LCD panels that are suitable without FFC problems. Although having said that, if you are real good with electronics, you could make a FFC extension for the LCD. Usually, a FFC extension can be fashioned from a FFC socket and an extension cable.



Q.

How do I safely trim the Fresnel Lenses for my application?

Carefully. The key to remember is, you don't do this everyday, so patience and perseverence will guarantee you don't crack the lenses. There are many schools of thought to Fresnel lens trimming:

  • Treat it as an acrylic panel and trim accordingly: Score and snap.
  • Jigsaw with aluminium cutting blade at high speed
  • Bandsaw with acrylic cutting blade (IDEAL)
  • Table saw

Q.

What safety concerns should I have about building a projector?

Basic safety precautions will ensure an injury free build.

  • AVOID working on electrical circuits with power running
  • Use safety equipment like safety goggles/gloves/ear protection when working with tools
  • Work in a clean, uncluttered and well-lit environment.
  • Concentrate. Measure twice, cut once. Operate in a mindset of common sense.
  • If you are a minor, you need to consult a competent adult about using working with electrical circuits and power tools.
  • Most importantly, always visualise a completed projector and you will reach your goal.
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