12V DC to 120V AC inverter

K

kewl

New Member

• Apr 14, 2011

• #1

i want to know the working of the circuit

 

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ericgibbs

Well-Known Member

Most Helpful Member

• Apr 14, 2011

• #2

hi,
One point is that the 9.1V zener will be destroyed as soon as the 12V is applied.!!

With such an obvious error I would be suspicious of the rest of the circuit.

 

Boncuk

New Member

• Apr 14, 2011

• #3

ericgibbs said:

hi,
One point is that the 9.1V zener will be destroyed as soon as the 12V is applied.!!

With such an obvious error I would be suspicious of the rest of the circuit.

Click to expand...

May be it is meant as an auxiliary fuse.

 

crutschow

Well-Known Member

Most Helpful Member

• Apr 14, 2011

• #4

It appears to be a simple square-wave inverter with each half of the split-input winding alternately connected the the +12V by the darlington transistors.

The darlington transistors have a relatively high on-voltage so the efficiency would be poor.

 

audioguru

Well-Known Member

Most Helpful Member

• Apr 14, 2011

• #5

I already explained all this in a PM about 6 hours ago.
Also 3 pins of the IC are not connected so it won't work.
It is a stupid simple circuit without any voltage regulation. Most electronic products will not work from its square-wave.
Why do websites post garbage circuits like this with so many errors?