Help converting simple schematic to 110v
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From: Jan Panteltje on 27 Jun 2010 10:10 On a sunny day (Sun, 27 Jun 2010 05:37:39 -0700 (PDT)) it happened Michael <michael.haip(a)gmail.com> wrote in <f65dcca9-b70e-4d62-bb7c-96dc9aea1414(a)w31g2000yqb.googlegroups.com>: >Thank you very much for the great explanation. Where I was getting >confused was in setting up two transformers in an isolation >configuration. I've been able to find many small transformers that >convert from 110V AC to 12V DC. I haven't been too successful finding >any that convert from 12V DC to 230V AC. > >- Michael > You do not want DC !!!!!!! Transformers, and this ciruit, only work with AC. I googled a bit using 'transformer 110 to 230 step up', and found among other things this: http://www.220-electronics.com/Transformers/trans/twowaytrans.htm 100W is a bit much, but the price seems OK (9$). Perhaps there be better deals. To many wats is probably no problem, maybe it can be used for other things too. Such a 100W transformer may draw some more current though. More googling finds this at digikey.com: http://parts.digikey.com/1/parts/999267-transformer-115-230v-12v-10va-bv048-5331-0.html about 5 $, 10W, and a split primary. You could perhaps try using it like this (download that datasheet): ---------------------------------- 230 V--- | || ( || ( | || ( ) || |__ out 12V ) || |-------------------- 110V ) || |-- | || ( || ( in || ( || | ----------------------- 0V ----------------- But that does not provide isolation from the mains, but neither does the original circuit. The way this works is that you put 115 V on one winding, and for the output the other 115 V winding is in series, the voltages add, if you connected them the right way.
From: amdx on 27 Jun 2010 11:18 -- MikeK "Jan Panteltje" <pNaonStpealmtje(a)yahoo.com> wrote in message news:i07m4b$d9b$1(a)news.albasani.net... > On a sunny day (Sun, 27 Jun 2010 05:37:39 -0700 (PDT)) it happened Michael > <michael.haip(a)gmail.com> wrote in > <f65dcca9-b70e-4d62-bb7c-96dc9aea1414(a)w31g2000yqb.googlegroups.com>: > >>Thank you very much for the great explanation. Where I was getting >>confused was in setting up two transformers in an isolation >>configuration. I've been able to find many small transformers that >>convert from 110V AC to 12V DC. I haven't been too successful finding >>any that convert from 12V DC to 230V AC. >> >>- Michael >> > > You do not want DC !!!!!!! > Transformers, and this ciruit, only work with AC. > > I googled a bit using 'transformer 110 to 230 step up', > and found among other things this: > http://www.220-electronics.com/Transformers/trans/twowaytrans.htm > > 100W is a bit much, but the price seems OK (9$). > > Perhaps there be better deals. > To many wats is probably no problem, maybe it can be used for other things > too. > Such a 100W transformer may draw some more current though. > > More googling finds this at digikey.com: > http://parts.digikey.com/1/parts/999267-transformer-115-230v-12v-10va-bv048-5331-0.html > about 5 $, 10W, and a split primary. > You could perhaps try using it like this (download that datasheet): > > > ---------------------------------- 230 V--- > | > || ( > || ( > | || ( > ) || |__ out > 12V ) || |-------------------- 110V > ) || |-- > | || ( > || ( in > || ( > || | > ----------------------- 0V ----------------- > > But that does not provide isolation from the mains, > but neither does the original circuit. > But for his circuit isolation is important for added safety. With isolation you might get a shock from one part of your fingertip to another part of your fingertip, if you get it between the two electrodes. Without isolation you might get a shock from your fingertip through your body to ground. Nasty! If he gets two of the digikey transformers you recommended, he could hook them 120v to 12v [ ] 12v to 240v then build the voltage multiplier circuit as described in his original post. Mike Mike
From: John G on 28 Jun 2010 02:07 On Sun, 27 Jun 2010 05:38:10 -0700 (PDT), Michael <michael.haip(a)gmail.com> wrote: >On Jun 27, 6:30�am, "JosephKK"<quiettechb...(a)yahoo.com> wrote: >> On Sat, 26 Jun 2010 19:21:18 -0700 (PDT), Michael >> >> >> >> <michael.h...(a)gmail.com> wrote: >> >On Jun 25, 11:38�am, Michael <michael.h...(a)gmail.com> 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 >> >> >Yet another question.... >> >> >Can anyone advise whether this circuit is designed for AC or DC... >> >does it matter? �Also any thoughts on how many amps this will need? >> >> >Thanks. >> >> Strictly AC only. �Total load should be less than 30/1000 of an ampere. > >Thanks very much for the help! It never ceases to amaze me! How many so called experts who, admitedly seem to know a lot about the theory of everyting, give a whole lot of complex advice about how to build and fix the simplest of electrical/electronic devices without any regard for the practicalities of either the fix or the safety of the outcome. And it is worst with the simplest of problems because useually the OP is too green to understand the dangers he is being led into. This current device is a prime case. Even the original 110volt version could be a deathtrap. John G.
From: Jan Panteltje on 28 Jun 2010 06:56 On a sunny day (Sun, 27 Jun 2010 10:18:54 -0500) it happened "amdx" <amdx(a)knology.net> wrote in <ecdd6$4c276be2$18ec6dd7$2747(a)KNOLOGY.NET>: >> http://parts.digikey.com/1/parts/999267-transformer-115-230v-12v-10va-bv048-5331-0.html >> about 5 $, 10W, and a split primary. >> You could perhaps try using it like this (download that datasheet): >> >> >> ---------------------------------- 230 V--- >> | >> || ( >> || ( >> | || ( >> ) || |__ out >> 12V ) || |-------------------- 110V >> ) || |-- >> | || ( >> || ( in >> || ( >> || | >> ----------------------- 0V ----------------- >> >> But that does not provide isolation from the mains, >> but neither does the original circuit. >> > But for his circuit isolation is important for added safety. >With isolation you might get a shock from one part of your fingertip >to another part of your fingertip, if you get it between the two electrodes. >Without isolation you might get a shock from your fingertip through your >body to ground. Nasty! > If he gets two of the digikey transformers you recommended, he could hook >them >120v to 12v [ ] 12v to 240v then build the voltage multiplier circuit as >described >in his original post. > Mike OK: T1 T2 . _________________ ---------------------------------- | . | | | 115 ) || || ( | ) || _________ || ( 115 in | ___ ) || | | || ( 115 V | | || ( ) || |__ 230 V out ~ ----)---- || ( 12 12 ) || | | . | || ( ) || |-- . | ) || |_________| || ( |115 ) || || ( 115 | ) || || ( _____________|____| || || | ----------------------------------- It is likely not needed as the whole thing should be in an isolated cage (say plastic) with openings big enough frop the insects to go through, small enough to stop human fingers. Of course when he wats to catch bats and the like that could be a problem. hehe
From: Jim Thompson on 28 Jun 2010 10:44
On Mon, 28 Jun 2010 16:07:31 +1000, John G <greentest(a)ozemail.com.au> wrote: >On Sun, 27 Jun 2010 05:38:10 -0700 (PDT), Michael ><michael.haip(a)gmail.com> wrote: > >>On Jun 27, 6:30�am, "JosephKK"<quiettechb...(a)yahoo.com> wrote: >>> On Sat, 26 Jun 2010 19:21:18 -0700 (PDT), Michael >>> >>> >>> >>> <michael.h...(a)gmail.com> wrote: >>> >On Jun 25, 11:38�am, Michael <michael.h...(a)gmail.com> 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 >>> >>> >Yet another question.... >>> >>> >Can anyone advise whether this circuit is designed for AC or DC... >>> >does it matter? �Also any thoughts on how many amps this will need? >>> >>> >Thanks. >>> >>> Strictly AC only. �Total load should be less than 30/1000 of an ampere. >> >>Thanks very much for the help! > > >It never ceases to amaze me! >How many so called experts who, admitedly seem to know a lot about the >theory of everyting, give a whole lot of complex advice about how to >build and fix the simplest of electrical/electronic devices without >any regard for the practicalities of either the fix or the safety of >the outcome. > >And it is worst with the simplest of problems because useually the OP >is too green to understand the dangers he is being led into. > >This current device is a prime case. Even the original 110volt version > could be a deathtrap. > >John G. Yep. But consider the positive social aspects of natural selection ;-) ...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 at http://www.analog-innovations.com | 1962 | Obama: A reincarnation of Nixon, narcissistically posing in politically-correct black-face, but with fewer scruples. |