Re: Switch-mode Supply For Bug Zapper Fwd
To: High Voltage list Subject: Re: Switch-mode provide for indoor bug zapper indoor bug zapper (fwd) You want the elements for the steel you intend to make use of. Differing kinds have different losses. You receive this from the mfgr. Digi-Key has some inexpensive IR sort 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 bug zapper for backyard. A small single ended NST works great for this application. The present will burn them right up. The fly hits the IR beam at the 1/2 mid-manner level which energizes a small grid in each direction. The midpoint has a piece 2 inches lengthy with no grid. They change into trapped and can't exit either course without getting zapped. You could 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 period. Then the charged cap waits for the fly. The charging cycle occurs every 5 minutes and is managed by a 555 IC chip --- a small relay controls the facility part. You set sugar crystals in the tube and at the top of the tube use a small glass check tube so you'll be able to see your accumulated flies to adjust the time periods. The flies will accumulate and then try to exit the charged grid section. The one we've makes use of a traditional laminated iron, 50Hz transformer. I'd like, so I'm looking at making a switchmode version. 2) Ditto for sizing the elements for the snubber. HV rectification and that I'd need a string of excessive-velocity diodes.
Dynatrap makes insect traps that work on the identical principle as others. They attract flying bugs with warmth and carbon dioxide, then catch them and stop them from escaping. For warmth, they use a fluorescent extremely-violet bulb, which also emits rechargeable bug zapper-attracting light. The principle difference is that they don’t use propane to create carbon dioxide (CO2). Instead, they use a special course of. More on that below. Since they don’t use propane, which means no need to purchase and alter cylinders, and best of all, no upkeep problems with clogged strains or failure of the propane to mild-points that bother many different traps. You continue to have to plug them in, so you’ll need an out of doors outlet and an extension cord if you want dangle the entice more than 7-10 ft from the outlet. The DT2000XL model is dearer than the DT1000 model, but it’s larger, with a stronger fan and vibrant gentle, and might attract bugs from farther away, with coverage as much as an acre for the DT2000XL and a half-acre for the DT1000, in accordance with the manufacturer.
If you’ve positively decided not to purchase a propane backyard mosquito control entice, that is the following neatest thing. I’ll checklist the pros and cons of the two models together, because they’re similar. Its preliminary value is cheaper than propane traps. It doesn’t require the trouble and expense of changing propane tanks. It catches other bugs apart from mosquitoes, although that’s not always 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 atmosphere, since it uses no insecticides. The large one: it doesn’t necessarily kill mosquitoes particularly, so you may get more moths or other issues as a substitute. You’ll have to mount it about 5 to six toes off the ground. One mannequin, backyard mosquito control the DT1200, comes with its own hanger, but otherwise, it wants a tree department, post, wall, fence, etc. to cling or sit on.
If you employ it outdoors, it may need some rain shelter to prevent water from getting into the accumulating area. It wants an outlet 7-10 ft away or keep mosquitoes away an extension cord. It’s difficult to empty without letting some bugs escape. The claim that it emits an efficient amount of CO2 has been questioned. Like all traps, it needs positioned 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 highest of the entice emit warmth and ultraviolet rays, which attract mosquitoes in addition to other insects, notably moths at night time. 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 beneath, where they’re unable to flee and die inside a day. Unfortunately, gentle and warmth are simply two of the things that attract mosquitoes, since what they’re primarily on the lookout for are people to bite.
Carbon dioxide is what they really search, since we and other animals emit it once we exhale. Mosquitoes know that if they comply with that vapor path, there will be a tasty animal on the opposite finish, ready to be bitten. To produce carbon dioxide, the Dynatrap uses a broad sort 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, as a substitute 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 floor would need coated with a source of carbon, like mud or useless bugs, to ensure that the method to make carbon dioxide. See the overview here (scroll all the way down to Dr. Marsteller’s remark).