To: High Voltage checklist Subject: Re: Switch-mode supply for bug zapper (fwd) You want the components for the steel you intend to use. Different types have different losses. You receive 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 application. The current will burn them right up. The fly hits the IR beam on the 1/2 mid-way point which energizes a small grid in every course. The midpoint has a section 2 inches long with no grid. They become trapped and can't exit either direction without getting zapped. You could additionally use a 600 Ohm to 10K audio xmfr. They make nice HV sparks operating in a pulsed mode. If the time duration is brief, like 1-2 sec, they could also 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 every 5 minutes and is managed by a 555 IC chip --- a small relay controls the ability section. You place sugar crystals within the tube and at the tip of the tube use a small glass test tube so you may see your accumulated flies to adjust the time intervals. The flies will accumulate after which attempt to go out the charged grid section. The one we have now uses 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-speed diodes.

Dynatrap makes insect traps that work on the same principle 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 gentle. The primary difference is that they don’t use propane to create carbon dioxide (CO2). Instead, they use a special course of. More on that under. Since they don’t use propane, meaning no want to purchase and alter cylinders, and better of all, no maintenance issues with clogged traces or failure of the propane to light-issues that bother many other traps. You still have to plug them in, so you’ll need an outdoor Zap Zone Defender System outlet and an extension cord if you want hang the lure more than 7-10 ft from the outlet. The DT2000XL mannequin is more expensive than the DT1000 model, but it’s greater, with a stronger fan and bright mild, and may attract bugs from farther away, with protection as much as an acre for the DT2000XL and a half-acre for the DT1000, in accordance with the manufacturer.

If you’ve undoubtedly determined not to buy a propane mosquito trap, this is the subsequent smartest thing. I’ll record the pros and cons of the two models collectively, as a result of they’re similar. Its initial value is cheaper than propane traps. It doesn’t require the hassle and expense of changing propane tanks. It catches other bugs besides mosquitoes, though that’s not all the time good if they’re beneficial ones. You can 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, youngsters and the setting, because it makes use of no insecticides. The big one: it doesn’t essentially kill mosquitoes specifically, so you could get extra moths or different things as a substitute. You’ll must mount it about 5 to six ft off the bottom. One model, the DT1200, comes with its own hanger, but otherwise, Zap Zone Defender Device it needs a tree department, put up, Zap Zone Defender wall, fence, and so on. to grasp or sit on.

If you use it outdoors, it may need some rain shelter to forestall water from moving into the gathering area. It wants an outlet 7-10 feet away or Zap Zone Defender System an extension cord. It’s tough 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 placed in a good location, shady and sheltered, where mosquitoes can find it, however not where you’ll be bothered by them. The lights in the top of the lure emit warmth and ultraviolet rays, which appeal to mosquitoes in addition to different insects, particularly moths at evening. There are openings below the lights where 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 within a day. Unfortunately, gentle and warmth are just two of the issues that appeal to mosquitoes, since what they’re mainly in search of are individuals to chunk.

Carbon dioxide is what they actually search, since we and different animals emit it once we exhale. Mosquitoes know that if they observe that vapor path, there will likely be a tasty animal on the other finish, ready to be bitten. To provide carbon dioxide, the Dynatrap uses a broad type of funnel above the fan, coated with titanium dioxide (TiO2). The producer claims that when the ultraviolet light reacts with the TiO2, "a photocatalytic reaction takes place that produces carbon dioxide." That is the process it uses, as a substitute of burning propane like other traps. However, when the University of Wisconsin tried to measure the quantity of carbon dioxide emitted, they reported that they detected none at all. One reviewer pointed out that the TiO2 floor would wish coated with a supply of carbon, like mud or dead bugs, to ensure that the process to make carbon dioxide. See the overview here (scroll all the way down to Dr. Marsteller’s remark).