Help converting simple schematic to 110v
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From: Robert Baer on 26 Jun 2010 01:53 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 Only the transformer "needs" changing OR use another transformer for 120V to 230V conversion. Nothing else needs any change.
From: Robert Baer on 26 Jun 2010 01:55 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. > (fake) cockroach-waldorf(astoria)..
From: amdx on 26 Jun 2010 06:59 -- MikeK "Michael" <michael.haip(a)gmail.com> wrote in message news:090c5b5a-db4f-4e1a-8328-ac1a0ecae444(a)j4g2000yqh.googlegroups.com... On Jun 25, 5:01 pm, "amdx" <a...(a)knology.net> wrote: > "Michael" <michael.h...(a)gmail.com> wrote in message > > news:04bd4c14-e044-475c-a2f3-963aa8fd4ae6(a)5g2000yqz.googlegroups.com... > On Jun 25, 1:43 pm, Bert Hickman <bert-hick...(a)comcast.net> wrote: > > > > > 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/CockcroftWalton_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 athttp://www.capturedlightning.com > > ******************************************************************** > > Hi Bert, thanks for taking the time to reply. > > You sound like a particularly knowledgeable person. Do you have any > thoughts on other safety measures to incorporate to reduce the > likelihood of killing something other than bugs? > > - Michael > I would recommend an isolation transformer, you can build that with two > back to back > transformers. In other words 120v to12v[]12v to 120v, but if you go this > route you may > as well use a transformer with dual primaries and series the primaries on > one so you get; > 120v to 12v[]12v to 240v, then build the circuit as per the diagram. > Mike Thanks for the recommendation. Do I need anything else between the two transformers (diode?) to prevent potential back flow of voltage from the 12v to 240 to the 120v to 12v? - Michael No, put nothing between the two transformers. Just connect the two 12v windings together. These transformers secondaries don't need to be 12v they could be 18v or 24v, etc. A diode would cause a malfunction. Mike
From: Jan Panteltje on 26 Jun 2010 07:01 On a sunny day (Fri, 25 Jun 2010 21:02:44 -0700 (PDT)) it happened MC Haip <peeko75(a)gmail.com> wrote in <9c6213f4-4fb9-40b7-ab51-a02276f0c05b(a)x21g2000yqa.googlegroups.com>: >On Jun 25, 3:56�pm, Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote: >> On a sunny day (Fri, 25 Jun 2010 12:49:36 -0700 (PDT)) it happened Michae= >l >> <michael.h...(a)gmail.com> wrote in >> <2faf4582-ffdf-4ee7-9fbc-2081e8c82...(a)j8g2000yqd.googlegroups.com>: >> >> >Thanks for the transformer tip. >> >> A very smal ltransformer should do (in VA), as tehre is hardly any power = >used. >> >> >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? >> >> Maybe a resistor of a few hundred K Ohm over C7, so it automatically disc= >harges if disconnected? >> If you make it a lower value it will start drawing more then a W. >> >> For example Uc7 = 230 x sqrt(2) = 325 V, U^2 is about �10^5, so 100= >k makes 1 Watt. >> The time constant then is 10^5 x 10^-4 = 10 seconds for discharge. >> 100 seconds for 1M. > >Thanks for the help. Can you confirm if this this what you are >suggesting? > >https://docs.google.com/leaf?id=0ByeTqxcQsAnPNGMxNTFmODUtODI5NS00ZmExLWI4= >YzgtN2VkMDQyMjhjODU5&sort=name&layout=list&num=50 Yes, that is the idea.
From: Michael on 26 Jun 2010 22:10
On Jun 25, 12:06 pm, Jim Thompson <To-Email-Use-The-Envelope-I...(a)On- My-Web-Site.com> wrote: > On Fri, 25 Jun 2010 12:01:54 -0500, Bert Hickman > > > > <bert-hick...(a)comcast.net> 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. > > >Bert > > Just buy an old neon transformer ;-) > > ...Jim Thompson > -- > | James E.Thompson, CTO | mens | > | Analog Innovations, Inc. | et | > | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | > | Phoenix, Arizona 85048 Skype: Contacts Only | | > | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | > | E-mail Icon athttp://www.analog-innovations.com| 1962 | > > Obama: A reincarnation of Nixon, narcissistically posing in > politically-correct black-face, but with fewer scruples. This sounds like a pretty good idea. Seems ebay has quite a few used transformers for sale. Thanks for the idea. |