Re: Switch-mode Supply For Bug Zapper Fwd
To: High Voltage list Subject: Re: Switch-mode provide for bug zapper (fwd) You want the components for the steel you intend to use. Differing types have completely different losses. You obtain this from the mfgr. Digi-Key has some inexpensive 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 current will burn them proper up. The fly hits the IR beam at the 1/2 mid-manner level which energizes a small grid in every course. The midpoint has a piece 2 inches lengthy with no grid. They become trapped and can't exit either path with out getting zapped. You could additionally use a 600 Ohm to 10K audio xmfr. They make good HV sparks operating in a pulsed mode. If the time duration is short, like 1-2 sec, they could 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 occurs each 5 minutes and is controlled by a 555 IC chip --- a small relay controls the facility section. You set sugar crystals in the tube and at the tip of the tube use a small glass take a look at tube so you'll be able to 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've uses a traditional laminated iron, 50Hz transformer. I'd like, summer mosquito protection so I'm taking a look at making a switchmode version. 2) Ditto for sizing the components for the snubber. HV rectification and that I'd need a string of excessive-pace diodes.
Dynatrap makes insect traps that work on the identical principle as others. They appeal to flying bugs with warmth and carbon dioxide, then catch them and forestall them from escaping. For warmth, they use a fluorescent ultra-violet bulb, which also emits bug-attracting light. The principle distinction 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, which means no want to buy and alter cylinders, and best of all, no maintenance problems with clogged traces or failure of the propane to light-points that trouble many other traps. You continue to must plug them in, so you’ll want an outside outlet and an extension cord if you need cling the trap greater than 7-10 feet from the outlet. The DT2000XL mannequin is more expensive than the DT1000 model, however it’s bigger, with a stronger fan and brilliant mild, and might entice bugs from farther away, with coverage as much as an acre for the DT2000XL and a half-acre for the DT1000, based on the producer.
If you’ve undoubtedly determined not to purchase a propane summer mosquito protection trap, that is the next neatest thing. I’ll list the professionals and cons of the two models together, as a result of they’re similar. Its preliminary cost is cheaper than propane traps. It doesn’t require the trouble and expense of replacing propane tanks. It catches other bugs apart from mosquitoes, although 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, youngsters and the atmosphere, since it uses no insecticides. The big one: it doesn’t necessarily kill mosquitoes particularly, so you might get more moths or other things as an alternative. You’ll need to mount it about 5 to six toes off the bottom. One model, the DT1200, comes with its personal hanger, but otherwise, it needs a tree branch, post, wall, fence, etc. to dangle or sit on.
If you employ it outdoors, it may need some rain shelter to prevent water from moving into the gathering area. It needs an outlet 7-10 feet away or an extension cord. It’s tough 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 wants placed in a superb location, shady and sheltered, the place mosquitoes can find it, however not where you’ll be bothered by them. The lights in the highest of the trap emit warmth and ultraviolet rays, which appeal to mosquitoes in addition to other insects, particularly moths at evening. There are openings under the lights where 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 within a day. Unfortunately, gentle and warmth are simply two of the things that appeal to mosquitoes, since what they’re primarily looking for are individuals to bite.
Carbon dioxide is what they really seek, since we and other animals emit it once we exhale. Mosquitoes know that in the event that they follow that vapor trail, there can be a tasty animal on the other 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 manufacturer claims that when the ultraviolet mild reacts with the TiO2, "a photocatalytic response takes place that produces carbon dioxide." This is the method it uses, instead 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 identified that the TiO2 surface would wish coated with a source of carbon, like dust or useless bugs, in order for the method to make carbon dioxide. See the review here (scroll right down to Dr. Marsteller’s comment).