nanopoylos Posted May 26, 2005 Report Share Posted May 26, 2005 hello guysi wanted to make an active filter for my carnothing special no need to be adjustable , no need to have more gain , my car r/cd is 4 volts preouti found some very interesting chips in maximactive filters with programmable q,f0,anythingi bought some ic's from maxim max262,264,265,274,275,278i have the documentation but its very complicated to mei am ascing if someone has a site with ready projects for this chips or with other chipsi do not want to use op-amps nad calculate anything on the paper , i just cant , i do not know how to do thati think the project with maxim is much more easy but i cant make it workplease help me anywaysthank you Quote Link to comment Share on other sites More sharing options...
MP Posted May 27, 2005 Report Share Posted May 27, 2005 hello guysi wanted to make an active filter for my carnothing special no need to be adjustable , no need to have more gain You are wanting to use the wrong chips for an easy off the shellf active filter. These are meant to be controlled with a microprocessor and they need a clock control as well. There are basic active filter chips out there.MP Quote Link to comment Share on other sites More sharing options...
nanopoylos Posted May 27, 2005 Author Report Share Posted May 27, 2005 well not all work with pic'ssome work with resistorsbut you are right , i did something wrongplease tell me what to buy from maxim to build a stereo active xover 3 way , or 2 wayor some linksthnx Quote Link to comment Share on other sites More sharing options...
MP Posted May 31, 2005 Report Share Posted May 31, 2005 Here is one such chip.MPUAF42_Universal_Filter_IC.pdf Quote Link to comment Share on other sites More sharing options...
MP Posted May 31, 2005 Report Share Posted May 31, 2005 Here is also a tutorial that I posted a few years ago to build and calculate your own.MPState_Variable_F.zip Quote Link to comment Share on other sites More sharing options...
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