To: High Voltage list Subject: Re: Switch-mode provide for bug zapper (fwd) You want the components for the steel you intend to use. Differing kinds have completely different losses. You get hold of this from the mfgr. Digi-Key has some cheap IR kind emitters & detectors. Have the fly crawl a distance, like 4-6 inches inside the tube, and then, he triggers the IR beam which controls the zapper. A small single ended NST works nice for this software. The current will burn them proper up. The fly hits the IR beam on the 1/2 mid-way level which energizes a small grid in each path. The midpoint has a section 2 inches long with no grid. They turn into trapped and can't exit both direction without getting zapped. You could also use a 600 Ohm to 10K audio xmfr. They make good HV sparks operating in a pulsed mode. If the time duration is short, like 1-2 sec, they might additionally charge a cap rectified with a 1/2 wave diode in a short time period. Then the charged cap waits for the fly. The charging cycle happens each 5 minutes and is controlled by a 555 IC chip --- a small relay controls the ability section. You set sugar crystals within the tube and at the tip of the tube use a small glass test tube so you'll be able to see your accumulated flies to adjust the time periods. The flies will accumulate and then try to exit the charged grid section. The one now we have makes use of a conventional laminated iron, 50Hz transformer. I'd like, so I'm taking a look at making a switchmode version. 2) Ditto for sizing the parts for the snubber. HV rectification and that I'd need a string of excessive-velocity diodes.
Dynatrap makes insect traps that work on the same precept as others. They appeal to flying bugs with warmth and carbon dioxide, then catch them and forestall them from escaping. For warmth, they use a fluorescent extremely-violet bulb, which additionally emits bug-attracting light. The principle distinction is that they don’t use propane to create carbon dioxide (CO2). Instead, they use a special process. More on that under. Since they don’t use propane, that means no want to buy and alter cylinders, and best of all, no upkeep issues with clogged lines or failure of the propane to light-issues that trouble many other traps. You still have to plug them in, so you’ll need an out of doors outlet and an extension cord if you want grasp the lure more than 7-10 ft from the outlet. The DT2000XL model is dearer than the DT1000 model, but it’s greater, with a stronger fan and bright mild, and may attract bugs from farther away, with coverage as much as an acre for the DT2000XL and a half-acre for the DT1000, according to the producer.
If you’ve undoubtedly determined not to purchase a propane mosquito trap, that is the next best thing. I’ll listing the professionals and cons of the 2 fashions collectively, because they’re comparable. Its preliminary cost is cheaper than propane traps. It doesn’t require the trouble and expense of changing propane tanks. It catches other bugs in addition to mosquitoes, though that’s not all the time good if they’re useful ones. You need to use it indoors or outdoors. The one sound is the quiet humming of the fan and there’s no odor. It’s secure for pets, kids and the surroundings, Zap Zone Defender Device since it uses no insecticides. The big one: it doesn’t essentially kill mosquitoes specifically, so you could get more moths or Zap Zone Defender Device different things as an alternative. You’ll need to mount it about 5 to six ft off the ground. One model, the DT1200, comes with its own hanger, but otherwise, it wants a tree branch, post, wall, fence, etc. to grasp or sit on.
If you utilize it outdoors, it may need some rain shelter to stop water from stepping into the accumulating space. It wants an outlet 7-10 ft away or an extension cord. It’s tricky to empty with out letting some bugs escape. The declare that it emits an efficient quantity of CO2 has been questioned. Like all traps, it needs positioned in a good location, shady and sheltered, where mosquitoes can discover it, however not where you’ll be bothered by them. The lights in the top of the lure emit warmth and ultraviolet rays, which entice mosquitoes in addition to other insects, notably moths at evening. There are openings beneath the lights the place bugs can fly in. Once inside, they’re sucked down by the fan’s air currents into the retaining cage below, the place they’re unable to escape and die inside a day. Unfortunately, gentle and warmth are simply two of the things that attract mosquitoes, since what they’re primarily in search of are people to bite.
Carbon dioxide is what they really search, since we and different animals emit it after we exhale. Mosquitoes know that in the event that they comply with that vapor path, there might be a tasty animal on the opposite end, able to be bitten. To produce carbon dioxide, the Dynatrap uses a broad kind of funnel above the fan, Zap Zone Defender Device coated with titanium dioxide (TiO2). The manufacturer claims that when the ultraviolet gentle reacts with the TiO2, "a photocatalytic response takes place that produces carbon dioxide." This is the process it uses, as a substitute of burning propane like different traps. However, when the University of Wisconsin tried to measure the amount of carbon dioxide emitted, they reported that they detected none in any respect. One reviewer pointed out that the TiO2 floor would want coated with a source of carbon, like dust or Zap Zone Defender Device useless bugs, Zap Zone Defender to ensure that the method to make carbon dioxide. See the evaluation here (scroll down to Dr. Marsteller’s comment).