To: High Voltage list Subject: Re: Switch-mode provide for bug zapper (fwd) You need the factors for the steel you intend to use. Differing kinds have different losses. You obtain 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 utility. The present will burn them right up. The fly hits the IR beam at the 1/2 mid-approach level which energizes a small grid in each course. The midpoint has a section 2 inches long with no grid. They turn out to be trapped and cannot exit both route with out getting zapped. You would 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 could also charge a cap rectified with a 1/2 wave diode in a short while period. Then the charged cap waits for the fly. The charging cycle occurs each 5 minutes and is managed by a 555 IC chip --- a small relay controls the power part. You set sugar crystals in the tube and at the top of the tube use a small glass test tube so you may see your accumulated flies to adjust the time durations. The flies will accumulate after which attempt to exit the charged grid part. The one we've uses a conventional laminated iron, 50Hz transformer. I'd like, Zap Zone Defender so I'm taking a look at making a switchmode model. 2) Ditto for sizing the elements for the snubber. HV rectification and that I'd want a string of high-pace diodes.

Dynatrap makes insect traps that work on the same principle as others. They entice flying bugs with warmth and carbon dioxide, then catch them and stop them from escaping. For warmth, Zap Zone Defender Experience they use a fluorescent ultra-violet bulb, which additionally emits bug-attracting mild. The primary difference is that they don’t use propane to create carbon dioxide (CO2). Instead, they use a particular course of. More on that below. Since they don’t use propane, Zap Zone Defender System which means no want to buy and alter cylinders, and better of all, no maintenance problems with clogged lines or failure of the propane to gentle-issues that trouble many other traps. You still must plug them in, so you’ll want an outdoor outlet and an extension cord if you'd like hold the trap more than 7-10 toes from the outlet. The DT2000XL model is costlier than the DT1000 mannequin, but it’s greater, with a stronger fan and vivid light, and may entice bugs from farther away, with protection up to an acre for the DT2000XL and a half-acre for the DT1000, in keeping with the manufacturer.

If you’ve undoubtedly decided not to buy a propane mosquito entice, this is the following neatest thing. I’ll list the professionals and cons of the 2 fashions together, as a result of they’re related. Its initial value is cheaper than propane traps. It doesn’t require the problem and expense of changing propane tanks. It catches other bugs besides mosquitoes, though that’s not at all times good if they’re useful ones. You need to use it indoors or outdoors. The only sound is the quiet humming of the fan and there’s no odor. It’s secure for pets, children and the surroundings, because it makes use of no insecticides. The large one: it doesn’t essentially kill mosquitoes specifically, so you may get more moths or Zap Zone Defender different things as an alternative. You’ll need to mount it about 5 to 6 ft off the ground. One model, the DT1200, comes with its own hanger, but otherwise, it wants a tree branch, publish, wall, fence, and many others. to dangle or sit on.

If you use it outdoors, it may have some rain shelter to stop water from moving into the amassing area. It wants an outlet 7-10 toes away or an extension cord. It’s difficult to empty with out letting some bugs escape. The declare that it emits an effective quantity of CO2 has been questioned. Like all traps, it needs positioned in a superb location, shady and sheltered, where mosquitoes can find it, but not where you’ll be bothered by them. The lights in the highest of the entice emit warmth and Zap Zone Defender ultraviolet rays, which appeal to mosquitoes in addition to different insects, particularly moths at night. There are openings below the lights the place bugs can fly in. Once inside, they’re sucked down by the fan’s air currents into the retaining cage beneath, where they’re unable to flee and die within a day. Unfortunately, mild and warmth are simply two of the issues that appeal to mosquitoes, since what they’re mainly on the lookout for are people to bite.

Carbon dioxide is what they really search, since we and different animals emit it when we exhale. Mosquitoes know that if they follow that vapor trail, there might be a tasty animal on the other end, ready to be bitten. To produce 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 gentle reacts with the TiO2, "a photocatalytic response takes place that produces carbon dioxide." That is the process it makes use of, as an alternative 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 surface 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).