Peak detector . . . .Help . . . . - Electronic Circuits Projects Diagrams Free

fero123 · 8th April 2003, 10:41 PM

PLEASE HELP ME:
I'd like to get the peak value of a signal of frequancy about 50 Hz and i got a schematic with the LM393 but it doesn't work. . . . . .
Another question I used the LM 339 as an "Acceptable voltage tester" in order to test if the voltage is in the accepted range or know and that circuit worked well with DC but when I used it with AC via an RC and bridge rectifier i found that the voltage refernce i made before "using potential devider" changes "flactuates" with the input rectified signal so what can i do please help me soon . . . .
Thanks

Gene · 9th April 2003, 01:51 AM

1. You have a schematic that dosen't work? You will probably have to share the schematic for help.

2. Your DC voltage fluctuates? You will probably have to share the schematic for help. How much fluctuation? Is there a filter in the schematic?

Scubasteve · 9th April 2003, 01:09 PM

This is for everyone... If you are going to ask a question and want help, please take the time to be clear and complete with details so that we are not stuck decoding and misinterpreting. It isn't that difficult to spend a couple minutes to make it answerable..

Steve

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8th April 2003, 10:41 PM	(permalink)
fero123	Peak detector . . . .Help . . . . PLEASE HELP ME: I'd like to get the peak value of a signal of frequancy about 50 Hz and i got a schematic with the LM393 but it doesn't work. . . . . . Another question I used the LM 339 as an "Acceptable voltage tester" in order to test if the voltage is in the accepted range or know and that circuit worked well with DC but when I used it with AC via an RC and bridge rectifier i found that the voltage refernce i made before "using potential devider" changes "flactuates" with the input rectified signal so what can i do please help me soon . . . . Thanks

9th April 2003, 01:51 AM	(permalink)
Gene	1. You have a schematic that dosen't work? You will probably have to share the schematic for help. 2. Your DC voltage fluctuates? You will probably have to share the schematic for help. How much fluctuation? Is there a filter in the schematic?

9th April 2003, 01:09 PM	(permalink)
Scubasteve	This is for everyone... If you are going to ask a question and want help, please take the time to be clear and complete with details so that we are not stuck decoding and misinterpreting. It isn't that difficult to spend a couple minutes to make it answerable.. Steve