Help converting simple schematic to 110v
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From: Michael on 26 Jun 2010 22:21 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.
From: Jan Panteltje on 27 Jun 2010 07:10 On a sunny day (Sat, 26 Jun 2010 19:21:18 -0700 (PDT)) it happened Michael <michael.haip(a)gmail.com> wrote in <10d23611-c1b6-4648-b20a-63220dc9e319(a)c10g2000yqi.googlegroups.com>: >Yet another question.... > >Can anyone advise whether this circuit is designed for AC or DC... The circuit is designed for AC input. That is why I suggested transformer 110 v to 230 V on the input. >does it matter? Also any thoughts on how many amps this will need? Add up all the currents (including any safety bleeder resistor), calculate the number or Watts. Then for a 110 V primary calculate the number of VA for the transformer core, Add some losses. Assume that a shorted condition could persist for a long time if a bugs hangs between the wires. So if for example you have 1 W dissipation in all resistors together, then perhaps use a 2 VA transformer with a thermal protection. You really only need a very small transformer, because,apart from the bleeder resistor, thing only draws a big current when charging up.
From: JosephKK on 27 Jun 2010 07:30 On Sat, 26 Jun 2010 19:21:18 -0700 (PDT), Michael <michael.haip(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.
From: Michael on 27 Jun 2010 08:37 On Jun 27, 6:10 am, Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote: > On a sunny day (Sat, 26 Jun 2010 19:21:18 -0700 (PDT)) it happened Michael > <michael.h...(a)gmail.com> wrote in > <10d23611-c1b6-4648-b20a-63220dc9e...(a)c10g2000yqi.googlegroups.com>: > > >Yet another question.... > > >Can anyone advise whether this circuit is designed for AC or DC... > > The circuit is designed for AC input. > That is why I suggested transformer 110 v to 230 V on the input. > > >does it matter? Also any thoughts on how many amps this will need? > > Add up all the currents (including any safety bleeder resistor), > calculate the number or Watts. > Then for a 110 V primary calculate the number of VA for the transformer core, > Add some losses. > Assume that a shorted condition could persist for a long time if a bugs hangs between the wires. > > So if for example you have 1 W dissipation in all resistors together, > then perhaps use a 2 VA transformer with a thermal protection. > You really only need a very small transformer, > because,apart from the bleeder resistor, > thing only draws a big current when charging up. 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
From: Michael on 27 Jun 2010 08:38
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! |