Holga mods page
John writes “If you have one of the hip Holga 120 ‘plastic-cams’ shooting 120 format film has it’s drawbacks, namely you can’t get it processed just anywhere. Well don’t dispaire, with a very small bit of work you can make a 35mm film adapter for it. Just need rubber bands and foam blocks (cardboard will do).BTW, this mod should work for most 120 cameras…” Link.
Great collection of camera hacks…Building a Car Camera Mount: A mount for getting in-car pictures and videos. Hacking Lenmar Mach 1 Speed Charger: Various battery power hacks using this cool charger. How to multiple expose with an APS camera: Want to try some creative imagery? How to re-use Kodak MAX One-Time-Use disposable camera? Let these step-by-step instruction show you how to turn disposable cameras into re-usable spy cameras.
…low-cost water disinfecting system, which basically consists of a plastic tube and an ultraviolet light bulb, which can be run on solar power. It processes about five liters of water per minute. Ultraviolet light has been used to disinfect water for quite a while now. The inventors say the UV-Tube differs from other systems because it is inexpensive and less energy intensive.
The purpose of this experiment is to maintain a stable plasmoid ( a ball lightning ) at one atmosphere in a spherical glass vessel. This experiment uses a kind of electronic trigger which is the GMR v1.0 ( Graphite Microwave Resonator ) placed in a microwave oven working at 2.45 GHz. A magnetron is compact, has a light weight ( compared to a HV transformer with the same output power ) and it is a high power device. It is able to produce a great amount of power in a small volume most particularly in a plasmoid.

