Hello folks,
My brother has been building a 12v DC to 110v AC inverter using a 555 timer circuit. I have been helping him troubleshoot it, and we've got a few questions.
The schematic he is working from ( http://www.123circuits.com/555inverter.htm ) gives no suggestion of what transformer to use. Right now he's got the 12v AC run into the secondary of a 110 to 12v transformer. The main problem is we're only getting about 47 volts AC on the other side of the transformer.
Is it normal that the voltage out would be this low? The 60Hz 12v AC going into the transformer is not very pretty (see the scope picture attached). Could the quality of the waveform be affecting the effectiveness of the transformer? Or is the input/output voltage ratio normally that different depending which side of the transformer the power's coming from?
Any thoughts welcome!
Thanks very much,
Adam
P.S. The oscilloscope photo shows what's coming out of the transformer. There is a very narrow peak right at the beginning of each side of the wave (almost invisible in the photo) that goes up to about 210v. Our meter reads 47v on the output, which I suppose is the RMS voltage (when the meter's plugged into the wall, it reads about 115).
My brother has been building a 12v DC to 110v AC inverter using a 555 timer circuit. I have been helping him troubleshoot it, and we've got a few questions.
The schematic he is working from ( http://www.123circuits.com/555inverter.htm ) gives no suggestion of what transformer to use. Right now he's got the 12v AC run into the secondary of a 110 to 12v transformer. The main problem is we're only getting about 47 volts AC on the other side of the transformer.
Is it normal that the voltage out would be this low? The 60Hz 12v AC going into the transformer is not very pretty (see the scope picture attached). Could the quality of the waveform be affecting the effectiveness of the transformer? Or is the input/output voltage ratio normally that different depending which side of the transformer the power's coming from?
Any thoughts welcome!
Thanks very much,
Adam
P.S. The oscilloscope photo shows what's coming out of the transformer. There is a very narrow peak right at the beginning of each side of the wave (almost invisible in the photo) that goes up to about 210v. Our meter reads 47v on the output, which I suppose is the RMS voltage (when the meter's plugged into the wall, it reads about 115).
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