Re: Switch-mode Supply For Bug Zapper Fwd
To: High Voltage list Subject: Re: Switch-mode supply for bug zapper (fwd) You need the factors for the steel you intend to make use of. Different types 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 great for this software. The present will burn them proper up. The fly hits the IR beam at the 1/2 mid-manner level which energizes a small grid in each course. The midpoint has a section 2 inches long with no grid. They change into trapped and can't exit both direction without getting zapped. You could possibly additionally use a 600 Ohm to 10K audio xmfr. They make good HV sparks working in a pulsed mode. If the time duration is brief, like 1-2 sec, they could 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 happens each 5 minutes and is managed by a 555 IC chip --- a small relay controls the ability part. You place sugar crystals within the tube and at the end 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 part. The one we have now uses a traditional laminated iron, 50Hz transformer. I'd like, so I'm looking at making a switchmode version. 2) Ditto for sizing the components for the snubber. HV rectification and that I'd need a string of high-pace diodes.
Dynatrap makes insect traps that work on the identical precept as others. They appeal to flying bugs with warmth and carbon dioxide, then catch them and prevent them from escaping. For warmth, they use a fluorescent extremely-violet bulb, which additionally emits bug-attracting gentle. The principle distinction is that they don’t use propane to create carbon dioxide (CO2). Instead, they use a particular process. More on that beneath. Since they don’t use propane, which means no want to buy and Zap Zone Defender System alter cylinders, and best of all, no maintenance problems with clogged lines or failure of the propane to gentle-issues that hassle many other traps. You continue to have to plug them in, Zap Zone so you’ll need an outdoor outlet and an extension cord if you would like cling the entice more than 7-10 ft from the outlet. The DT2000XL mannequin is dearer than the DT1000 mannequin, however it’s greater, with a stronger fan and shiny mild, and can attract bugs from farther away, with coverage as much as an acre for the DT2000XL and a half-acre for the DT1000, in line with the manufacturer.
If you’ve undoubtedly decided not to buy a propane mosquito lure, this is the following best thing. I’ll record the pros and cons of the two fashions together, because they’re related. Its initial cost is cheaper than propane traps. It doesn’t require the hassle and expense of replacing propane tanks. It catches different bugs apart from 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 protected for pets, kids and the environment, since it makes use of no insecticides. The large one: it doesn’t necessarily kill mosquitoes particularly, so you might get more moths or other issues as a substitute. You’ll must mount it about 5 to six feet off the ground. One model, the DT1200, comes with its own hanger, however otherwise, it wants a tree department, post, wall, fence, Zap Zone Defender System and many others. to grasp or sit on.
If you utilize it outdoors, it might have some rain shelter to prevent water from moving into the accumulating area. It needs an outlet 7-10 ft away or an extension cord. It’s difficult to empty without letting some bugs escape. The declare that it emits an efficient quantity of CO2 has been questioned. Like all traps, it wants placed in a superb location, shady and sheltered, the place mosquitoes can find it, but not where you’ll be bothered by them. The lights in the top of the entice emit warmth and ultraviolet rays, which entice mosquitoes as well as 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, the place they’re unable to escape and die inside a day. Unfortunately, light and warmth are just two of the issues that attract mosquitoes, since what they’re primarily looking for are individuals to chunk.
Carbon dioxide is what they actually seek, since we and different animals emit it when we exhale. Mosquitoes know that if they observe that vapor trail, there might be a tasty animal on the opposite end, able to be bitten. To supply carbon dioxide, the Dynatrap makes use of a broad sort 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 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 in any respect. 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 assessment here (scroll right down to Dr. Marsteller’s remark).
