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To: High Voltage record Subject: Re: Switch-mode supply for outdoor bug zapper zapper (fwd) You need the elements for the steel you intend to use. Differing types have totally 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 great for this software. The current will burn them proper up. The fly hits the IR beam at the 1/2 mid-approach point which energizes a small grid in each path. The midpoint has a section 2 inches long with no grid. They change into trapped and can't exit either route with out getting zapped. You possibly can also use a 600 Ohm to 10K audio xmfr. They make good HV sparks working 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 while interval. Then the charged cap waits for the fly. The charging cycle occurs every 5 minutes and is controlled by a 555 IC chip --- a small relay controls the ability section. You put sugar crystals within the tube and at the top of the tube use a small glass take a look at tube so you possibly can see your accumulated flies to regulate the time intervals. The flies will accumulate and then attempt to go out the charged grid part. The one we have now makes use of a traditional laminated iron, 50Hz transformer. I'd like, so I'm taking a look at making a switchmode model. 2) Ditto for sizing the components for the snubber. HV rectification and indoor bug zapper zapper light that I'd need a string of high-pace diodes.

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