H hks1233 New Member Jan 7, 2009 #1 a filter to extract 120khz signal from 230v 50hz line.....by distorting all its harmonics
blueroomelectronics Well-Known Member Jan 7, 2009 #4 Then you need a microcontroller. There is an app note on Microchips site using the 16F877 as an X10 device with code and schematics.
Then you need a microcontroller. There is an app note on Microchips site using the 16F877 as an X10 device with code and schematics.
H hks1233 New Member Jan 7, 2009 #5 designed a filter to extract 120khz data signal.....but its contain harmonics of ac...i need to attenuate that harmonics
designed a filter to extract 120khz data signal.....but its contain harmonics of ac...i need to attenuate that harmonics
blueroomelectronics Well-Known Member Jan 7, 2009 #6 Like I said, the Microchip app note contains a complete design including 120kHz filter.
H hks1233 New Member Jan 7, 2009 #7 that filter using cd4069 is not working.....(tuned amplifier using cd4069)
blueroomelectronics Well-Known Member Jan 7, 2009 #8 Post your schematic. Here's the Microchip app note using a 4069, is that what you built? https://www.electro-tech-online.com/custompdfs/2009/01/00236a.pdf Last edited: Jan 7, 2009
Post your schematic. Here's the Microchip app note using a 4069, is that what you built? https://www.electro-tech-online.com/custompdfs/2009/01/00236a.pdf
H hks1233 New Member Jan 7, 2009 #9 tuned amplifier in the page 21 of above pdf is not working.....any way to tune 120khz
blueroomelectronics Well-Known Member Jan 7, 2009 #10 Did you build it exactly as shown, did you substitute parts? It should work fine.
H hks1233 New Member Jan 7, 2009 #11 yes.......but i dont know how an hex inverter work as tuned amplifier.........but the untuned part is ok
yes.......but i dont know how an hex inverter work as tuned amplifier.........but the untuned part is ok
H hks1233 New Member Jan 7, 2009 #13 that tuned amplifier produce output for all frequency.......as a result of that the dc volatge at the envelope detector is fluctuating
that tuned amplifier produce output for all frequency.......as a result of that the dc volatge at the envelope detector is fluctuating
blueroomelectronics Well-Known Member Jan 7, 2009 #14 How did you build it and test it so quickly? Is it on a breadboard or PCB?
H hks1233 New Member Jan 7, 2009 #15 doing this as project using this pdf u providied from the past 1 week.......all things r working in that ckt except tuned amlifier
doing this as project using this pdf u providied from the past 1 week.......all things r working in that ckt except tuned amlifier
blueroomelectronics Well-Known Member Jan 7, 2009 #16 Did you actually build it or are you running it on a simulator?
blueroomelectronics Well-Known Member Jan 7, 2009 #18 And you built it without parts substituting, I would suggest an entry on Microchips own forums as it is a Microchip App note. I can only assume many have built it without problems else they'd change the app note.
And you built it without parts substituting, I would suggest an entry on Microchips own forums as it is a Microchip App note. I can only assume many have built it without problems else they'd change the app note.
K kripton2035 New Member Jan 7, 2009 #19 you may take a look at the schematic at : **broken link removed** there is a tuned 120khz filter with simple transistors I simulated this filter and it seems to work. I also simulated the filter with the 4069 of microchip app note and I couldnt make it work ... good luck also as I'm planning to make such thing please post here if it works really !
you may take a look at the schematic at : **broken link removed** there is a tuned 120khz filter with simple transistors I simulated this filter and it seems to work. I also simulated the filter with the 4069 of microchip app note and I couldnt make it work ... good luck also as I'm planning to make such thing please post here if it works really !