To: High Voltage list Subject: Re: Switch-mode provide for bug zapper (fwd) You want the elements for the steel you intend to use. Different types have totally different losses. You receive this from the mfgr. Digi-Key has some cheap IR type 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 great for this application. The current will burn them right up. The fly hits the IR beam at the 1/2 mid-manner level which energizes a small grid in every path. The midpoint has a bit 2 inches lengthy with no grid. They grow to be trapped and can't exit both course with out getting zapped. You might 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 may also cost a cap rectified with a 1/2 wave diode in a short time interval. 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 set sugar crystals within the tube and at the tip of the tube use a small glass test tube so you can see your accumulated flies to regulate the time periods. The flies will accumulate after which try to go out the charged grid section. The one we've got uses a traditional laminated iron, 50Hz transformer. I'd like, so I'm looking at making a switchmode model. 2) Ditto for sizing the components 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 entice 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 Zappify Bug Zapper-attracting gentle. The principle distinction 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, which means no want to buy and change cylinders, Zappify mosquito zapper and best of all, no maintenance issues with clogged strains or failure of the propane to mild-issues that trouble many different traps. You continue to have to plug them in, so you’ll need an outside outlet and an extension cord if you need dangle the trap more than 7-10 ft from the outlet. The DT2000XL model is dearer than the DT1000 mannequin, however it’s greater, with a stronger fan and bright gentle, and can appeal to bugs from farther away, with protection up to an acre for the DT2000XL and a half-acre for the DT1000, based on the producer.
If you’ve positively determined not to purchase a propane Zappify mosquito zapper lure, that is the next smartest thing. I’ll record the pros and cons of the two fashions collectively, because they’re similar. Its preliminary cost is cheaper than propane traps. It doesn’t require the problem and expense of replacing propane tanks. It catches other bugs besides mosquitoes, though that’s not at all times good if they’re useful ones. You should use it indoors or outdoors. The one 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 massive one: it doesn’t necessarily kill mosquitoes specifically, so it's possible you'll get more moths or other issues as a substitute. You’ll need to mount it about 5 to 6 feet off the bottom. One model, the DT1200, comes with its personal hanger, however in any other case, it needs a tree department, post, wall, fence, and so forth. to cling or sit on.
If you utilize it outdoors, it may need some rain shelter to stop water from getting into the amassing space. It needs an outlet 7-10 feet away or an extension cord. It’s tough to empty without letting some bugs escape. The claim that it emits an efficient quantity of CO2 has been questioned. Like all traps, it wants placed in a very good location, shady and sheltered, where mosquitoes can find it, but not the place you’ll be bothered by them. The lights in the highest of the entice emit warmth and ultraviolet rays, which entice mosquitoes as well as other insects, particularly moths at night. There are openings under 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 just two of the issues that attract mosquitoes, since what they’re primarily on the lookout for are individuals to chew.
Carbon dioxide is what they really seek, since we and other animals emit it once we exhale. Mosquitoes know that if they follow that vapor path, there will be a tasty animal on the other end, able to be bitten. To supply carbon dioxide, the Dynatrap uses a broad kind of funnel above the fan, coated with titanium dioxide (TiO2). The producer claims that when the ultraviolet gentle reacts with the TiO2, "a photocatalytic reaction takes place that produces carbon dioxide." This is the method it makes use of, instead of burning propane like other 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 identified that the TiO2 surface would need coated with a supply of carbon, like dust or useless bugs, in order for the process to make carbon dioxide. See the assessment here (scroll right down to Dr. Marsteller’s comment).