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audioguru
Nobel Prize Winner
Canada
3761 Posts |
 Posted - Jun 14 2006 : 4:17:44 PM
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That circuit has the same problems as this one:
1) The emitter-base junctions of the transistors have avalanche breakdown.
2) The 180 ohm resistors don't supply enough base current to the transistors.
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WaasiL
Apprentece
5 Posts |
Posted - Jun 15 2006 : 07:58:45 AM
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Hello to all.
What could be the easiest inverter to build? In a matter of parts and simplicity?
Waasil
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audioguru
Nobel Prize Winner
Canada
3761 Posts |
Posted - Jun 16 2006 : 5:07:04 PM
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This one is simple and easy:
A Cmos CD4047 oscillator needs just a resistor and a capacitor to make a low frequency perfect square-wave and also has an inverted output to drive a push-pull pair of darlington transistors or Mosfets to drive a center-tapped stepup transformer.
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WaasiL
Apprentece
5 Posts |
Posted - Jun 17 2006 : 01:45:10 AM
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Thanks allot audioguru for your reply.
1-What could be the wattage of that inverter?
2-Where can I get its schematic.
By the way, is it possible to use small normal transformer ( the ones which are in radios) just to test the inverter if it is working or not before buying a large transformer?
Please help me.
Thanks in advance.
WaasiL
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abdo_87
New Member
Libya
2 Posts |
Posted - Jun 17 2006 : 04:37:52 AM
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hi to every human in here,please could any body send me information about simple electronic transmitter
asd |
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audioguru
Nobel Prize Winner
Canada
3761 Posts |
Posted - Jun 17 2006 : 08:06:21 AM
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quote:
1-What could be the wattage of that inverter?
About 150W with a pair of darlington output transistors, or about 1kW with a pair of modern Mosfets. I saw a very powerful inverter that used 16 Mosfets.
quote:
2-Where can I get its schematic.
It is simple. Draw it yourself. Copy a Chinese one.
quote:
By the way, is it possible to use small normal transformer ( the ones which are in radios) just to test the inverter if it is working or not before buying a large transformer?
Yes, but it won't prove anything except that the oscillator works. You can test the oscillator without a transformer.
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audioguru
Nobel Prize Winner
Canada
3761 Posts |
Posted - Jun 17 2006 : 08:10:58 AM
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quote:
hi to every human in here,please could any body send me information about simple electronic transmitter
This topic is about the inverter project, not about a transmitter.
You can find out information and find FM transmitter projects in Google.
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WaasiL
Apprentece
5 Posts |
Posted - Jun 17 2006 : 08:15:23 AM
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Thanks a lot for your kind information audioguru.
Although, you said it is simple, I cant draw it my self as I can't visualize how it looks like.
Where can I get the Chinese schimatic one which you are reffering to?
Please continue your kind help.
Regards,
WaasiL
Edited by - WaasiL on Jun 17 2006 08:17:24 AM
Edited by - WaasiL on Jun 17 2006 08:22:51 AM |
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audioguru
Nobel Prize Winner
Canada
3761 Posts |
Posted - Jun 17 2006 : 09:05:35 AM
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A CD4047 oscillator has just one IC, one resistor and one capacitor. It drives two push-pull Mosfets. The Mosfets connect to a center-tapped transformer. A simple inverter is that simple.
I can buy a very nice Chinese-made inverter for a low price. It is small, has a fan inside for cooling, a display of the output power and battery voltage. It probably uses a pair of Mosfets to drive its transformer with a square-wave.
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tinker290
New Member
USA
1 Posts |
Posted - Aug 30 2006 : 04:03:11 AM
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| what site can you get this chinese inverter from you mentioned here. I just got a 2500 rated inverter it has no fuses or low voltage cut off or reverse hook up protection. atleast it has the 2 fans. How would i go about making this safer from overloads and shorts I would also like to control the fans by a thermostat instead of having 2 fans running constantly thank you in advance |
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emeka@yahoo.com
New Member
Nigeria
1 Posts |
Posted - Aug 30 2006 : 04:54:19 AM
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| aaron, from all the question and answers, do you still insist on ur circuit diagram or will you modify,and is that diagram the only way to produce an inverter , what are other ways, because it seems that capacitors is been a probrem there. has it any problem Making the transformer more than or less than 12 turns , and increasing or reducing the secondary turns as well |
don |
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Aaron Cake
Administrator
Canada
5722 Posts |
Posted - Aug 30 2006 : 09:17:56 AM
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I'll be happy to post a proper inverter schematic if someone provides one. I don't have the time or desire to design one and if I do, people will just poke holes in it.  |
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audioguru
Nobel Prize Winner
Canada
3761 Posts |
Posted - Aug 30 2006 : 2:06:46 PM
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People only poke holes in crappy circuits that blow up and don't work!
I posted links to a few simple inverter circuits that work, but now the links are gone. |
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klem
New Member
Nigeria
2 Posts |
Posted - Sep 13 2006 : 2:52:12 PM
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| mr moderator what is the problem with ur circuit why are people complainng have u really yried it ur self ?if it works pls asure me to go ahead with it if not kindly state the required components that will make it work. |
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audioguru
Nobel Prize Winner
Canada
3761 Posts |
Posted - Sep 13 2006 : 7:58:15 PM
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This inverter project doesn't work. There are a few other inverter circuits on the web that work fine.
I can buy a Chinese inverter at a local store that works fine and costs a lot less than the parts to make one. |
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Topic |
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12/120V inverter again
