Jared Bouck contributes his bit in the fight against food poisoning by adding mold-unfriendly ultraviolet (UV) lights to an ordinary household breadbox in this DIY project. Admittedly - and both he and we are making this public safety announcements in the interests of all bread-loving people in the world - this project won't stop molds from growing inside of bread loaves and rolls. So if you plan to really use this in real life, please do remember not to leave your rolls out uneaten too long, UV or no UV, and look before you bite in anything more than a week (give or take a few days) old.

He did conduct a scientific test with his DIY, though, and the results do demonstrate that the thing works. Taking three separate packs of bread rolls he took a pack of bread rolls, and one roll went into his UV moldless breadbox, another into a mundane breadbox without the trimmings, then left the setup for about two weeks. And conducted the same test with new packs of bread rolls two more times. The bread in the ordinary box turned into a biology experiment in those two weeks. The bread in the UV box remained clean. The results showed that the UV box helped extend the shelf life of bread by about 50%.

• A breadbox. Bouck chose the one he used for his project because it was metallic (and would reflect light), and also because it had built-in ventilation holes that would dump heat built up when the lamp is in use.
• A UV light. Bouck pried one off from a UV-based water purifying system obtained from eBay, and mounted it into a standard fluorescent light housing. There are other sources of UV lights available, mostly from medical and sanitation-related gadgets. Based upon the pictures provided, you're looking for a DC-powered unit using a power source brick/adapter. Keep the adapter.
• A set of power jacks and plugs - make sure that they match each other and the power source (most likely the adapter) you'll be using.
• A home security light controller - those designed to plug into electrical outlets and to which are plugged table and floor lamps. This is to switch the UV light on and off at intervals, to preserve the bulb's life and to prevent the breadbox from heating up. Heat can promote mold growth, despite the UV light.
• A baking rack, preferably chrome. If it fits in the breadbox, well and good. If not (most likely), be prepared to cut it down to size. This will be used to lift the bread rolls from the breadbox floor to allow light to shine from below.
• Tinfoil, and/or a mirror (if this doesn't fit the floor of the breadbox, break out the glass cutter and someone who knows how to use it)
  
• A few tools will be necessary: soldering iron, drill (depending on what your breadbox is made of, use the appropriate bit), hot glue, silicone

• Figure out where you want to mount the UV light. Bouck's advice is to consider lighting and heat requirements: the light must be reflected so that it will evenly bathe every surface of the bread loaf or roll, and try to isolate or vent as much heat from the lighting unit as possible. On Bouck's project the light was mounted at the top of the breadbox.
• Drill a hole on one lower corner in the back of the breadbox, big enough to fit the power jack into. In Bouck's case he drilled a 9/16ths hole.
• Create an internal extension plug to connect the power source to the light using one power jack and plug and a length of wire long enough to reach from the recently-drilled hole to where the light is to be mounted (if the light is mounted on a movable surface, such as a lid, give consideration for the farthest distance the light housing will travel from the drilled hole). Solder 8-inch long wire to connect the power jack and plug. Insulate the exposed end of the jack with heat-shrink tubing (that goes for all exposed electricals as well. Insulate them for safety).
• Mount the power jack into the drilled hole, outlet side facing outwards. The jack comes with a nut that's used to secure it to the breadbox wall.
• Mount your UV light to the position you've selected. In this case, hot glue was first used to "tack-weld" the housing to the breadbox, and then silicone was used for a more permanent bond.
• Plug the inner extension plug's free end to the light. Secure the wire to the side of the breadbox with hot glue.
• Line the bottom of the breadbox with tin foil - even a mirror if you could afford it - and line non-reflective inner surfaces as well. Bouck recommends using spray-on glue on the tin foil to make things easier.
• Cut the baking rack to fit inside the breadbox and secure it inside with hot glue.
• Finally, plug the power supply adapter to the light controller. Set the light controller to switch on/off at your desired interval, and plug it into the AC outlet. You did remember to plug the adapter's DC-output end to the power supply jack on the breadbox, right? Good.