Help converting simple schematic to 110v
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From: Michael on 25 Jun 2010 14:39 Hello, can someone help convert a schematic from 230v to 110v? I am interested in making a bug zapper from a schematic available online. The problem however is that it's designed for a 230v main. Can someone advise whether I need to adjust the components and/or add additional diode cascades? The schematic I'm considering is available online at: webspace.webring.com/people/bt/tjaco/bugzap/zapper.html Thanks in advance.
From: Bert Hickman on 25 Jun 2010 14:43 Tim Wescott wrote: > On 06/25/2010 10:01 AM, Bert Hickman wrote: >> Michael wrote: >>> Hello, can someone help with converting a schematic from 230v to 110v? >>> >>> I came across a schematic for a bug zapper online. I'm interested in >>> building the device but need help converting the components to 110v. >>> >>> Can someone identify appropriate resistors, capacitors and diodes? >>> >>> The schematic is available online at: >>> http://webspace.webring.com/people/bt/tjaco/bugzap/zapper.html >>> >>> Thanks in advance. >>> >>> - Michael >> >> Simply double the number of stages in the multiplier (currently made up >> of C1-C6 and D1-D6) and take the output from the end of the modified >> multiplier. > > And don't kill yourself! > > What's the name of that sort of multiplier chain? I forget. > Hehe... I hear you! The referenced circuit can kill you in a couple of ways since one end is tied directly to the 240 volt mains, and the stored energy (4.5 Joules) could also be sufficient to kill even if isolated by a transformer. The cascade circuit is most commonly known as a Cockroft-Walton multiplier. However, it apparently was first created by Swiss physicist Heinrich Greinacher in 1919, and is sometimes called a Greinacher multiplier. This particular design is a half-wave multiplier. Full wave varieties use a pair of cascade circuits, one for each polarity. http://en.wikipedia.org/wiki/Cockcroft�Walton_generator Bert -- ******************************************************************** We specialize in UNIQUE items: coins shrunk by ultra-strong magnetic fields, Captured Lightning Lichtenberg figure sculptures, and scarce technical Books. Please visit us at http://www.capturedlightning.com ********************************************************************
From: Michael on 25 Jun 2010 15:49 On Jun 25, 12:08 pm, Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote: > On a sunny day (Fri, 25 Jun 2010 09:38:59 -0700 (PDT)) it happened Michael > <michael.h...(a)gmail.com> wrote in > <2f4911c6-23d1-4ecf-841a-2bc2626f7...(a)y4g2000yqy.googlegroups.com>: > > >Hello, can someone help with converting a schematic from 230v to 110v? > > >I came across a schematic for a bug zapper online. I'm interested in > >building the device but need help converting the components to 110v. > > >Can someone identify appropriate resistors, capacitors and diodes? > > >The schematic is available online at:http://webspace.webring.com/people/bt/tjaco/bugzap/zapper.html > > >Thanks in advance. > > >- Michael > > Auto-transformer (a 230V transformer with a 110 V tap). > You could also use 2 transformers, say a 100 to 12 transformer connected to a 12 to 230 transformer. > Is not this thing dangerous for humans too? > Better have it in an isolated cage with a light to attract the bugs. Thanks for the transformer tip. I suspect it will be quite dangerous. My plan is to build a the unit into a Mega Catch mosquito catcher. The unit dispenses small amounts of CO2 and has a fan to suck up the mosquitoes. The unit catches the bugs in a small mesh bag. Frankly I'm getting really tired of the cleaning. I'm hoping that I can build a grid to replace the bag. Idea is that they will be sucked into the grid and vaporized. The grid and components will be buried inside the catcher. Your point on safety got me thinking however. I'm now wondering if I should incorporate an easy way to discharge the caps in the event I need to disassemble to perform maintenance or clean. Any suggestions? - Michael
From: Michael on 25 Jun 2010 15:50 My apologies for the double post. After waiting a couple hours for my post to appear I concluded it got lost in the transfer and re- posted. Thanks to everyone for the help. - Michael
From: Michael on 25 Jun 2010 15:56
Thanks. The thought of adding more multipliers did cross my mind. It also resulted in a realization that the circuit was designed for DC. Converting to DC and stepping up through a transformer might be the better way to go. Thoughts? Thanks again. - Michael |