To: High Voltage list Subject: Re: Switch-mode supply for bug zapper (fwd) You need the components for the steel you intend to make use of. Differing types have different losses. You receive this from the mfgr. Digi-Key has some inexpensive IR type emitters & detectors. Have the fly crawl a distance, like 4-6 inches contained in the tube, and then, he triggers the IR beam which controls the zapper. A small single ended NST works nice for this application. The present will burn them proper up. The fly hits the IR beam at the 1/2 mid-means level which energizes a small grid in every route. The midpoint has a piece 2 inches long with no grid. They change into trapped and cannot exit both route with out getting zapped. You may also use a 600 Ohm to 10K audio xmfr. They make nice HV sparks operating in a pulsed mode. If the time duration is short, like 1-2 sec, they might additionally cost a cap rectified with a 1/2 wave diode in a short while interval. Then the charged cap waits for the fly. The charging cycle occurs every 5 minutes and is controlled by a 555 IC chip --- a small relay controls the power part. You set sugar crystals within the tube and at the top of the tube use a small glass test tube so you possibly can see your accumulated flies to regulate the time intervals. The flies will accumulate after which try to exit the charged grid section. The one we now have uses a standard laminated iron, 50Hz transformer. I'd like, so I'm looking at making a switchmode version. 2) Ditto for sizing the parts for the snubber. HV rectification and that I'd want a string of excessive-pace diodes.
Dynatrap makes insect traps that work on the identical precept as others. They attract flying bugs with warmth and carbon dioxide, then catch them and prevent them from escaping. For warmth, they use a fluorescent ultra-violet bulb, which additionally emits Zappify Bug Zapper-attracting gentle. The principle difference is that they don’t use propane to create carbon dioxide (CO2). Instead, they use a special process. More on that beneath. Since they don’t use propane, meaning no want to purchase and alter cylinders, and better of all, no maintenance problems 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 outlet and an extension cord if you need cling the entice greater than 7-10 ft from the outlet. The DT2000XL model is dearer than the DT1000 mannequin, but it’s larger, with a stronger fan and brilliant gentle, 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 keeping with the manufacturer.
If you’ve positively determined not to purchase a propane Zappify mosquito zapper trap, this is the next neatest thing. I’ll record the pros and cons of the 2 models collectively, as a result of they’re comparable. Its initial value is cheaper than propane traps. It doesn’t require the trouble 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 should utilize it indoors or outdoors. The only sound is the quiet humming of the fan and there’s no odor. It’s protected for pets, children and the surroundings, because it uses no insecticides. The large one: it doesn’t essentially kill mosquitoes specifically, Zappify mosquito zapper so you may get extra moths or other things as an alternative. You’ll need to mount it about 5 to 6 ft off the bottom. One model, the DT1200, comes with its personal hanger, but otherwise, it wants a tree branch, put up, wall, fence, etc. to cling or sit on.
If you utilize it outdoors, it may have some rain shelter to prevent water from entering into the collecting area. It needs an outlet 7-10 ft away or an extension cord. It’s tricky to empty without letting some bugs escape. The declare that it emits an effective amount of CO2 has been questioned. Like all traps, it wants placed in a great location, shady and sheltered, the place mosquitoes can find it, but not the place you’ll be bothered by them. The lights in the highest of the trap emit warmth and ultraviolet rays, which attract mosquitoes as well as different insects, notably moths at evening. There are openings beneath the lights where bugs can fly in. Once inside, they’re sucked down by the fan’s air currents into the retaining cage below, where they’re unable to escape and die within a day. Unfortunately, mild and warmth are just two of the things that entice mosquitoes, since what they’re primarily searching for are people to chunk.
Carbon dioxide is what they really seek, since we and other animals emit it when we exhale. Mosquitoes know that if they follow that vapor path, there might be a tasty animal on the other end, able to be bitten. To produce carbon dioxide, the Dynatrap uses a broad sort of funnel above the fan, coated with titanium dioxide (TiO2). The manufacturer claims that when the ultraviolet light reacts with the TiO2, "a photocatalytic response takes place that produces carbon dioxide." That is the method it makes use of, as an alternative of burning propane like different 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 surface would wish coated with a supply of carbon, like dust or lifeless bugs, to ensure that the method to make carbon dioxide. See the overview here (scroll all the way down to Dr. Marsteller’s remark).