How do you make a high pass square wave filter?
99168
Need more detail.  Analog or digital?  Cutoff frequency?  Out of band rejection?  Is there a constraint on number of orders?  Matlab has built in functions to do filter design.  \n\nSomething a simple as a suitable capacitor will block low frequency.
65252
High frequency radio waves. Around 1700 Mhz.
916828
ok..u have for main categories of filters..\n\nlow pass (allow lower freq)\nhigh pass (allow higher freq)\nband pass (only allow a small band of freq)\nband stop (allow everything but a small band of freq)\n\npassband is a term used to describe the frequency portion of the filter where the signal goes through unattenuated (i.e. it isnt stopped).\n\nstopband is a term used to describe the frequency portion of the filter where the signal is attenuated (i.e. stopped)..\n\ngl with it..
946504
Intensity varies as the square of the distance.\nThat should help
654455
Two tutorials:\n\nhttp://users.rowan.edu/~polikar/WAVELETS/WTtutorial.html\nhttp://perso.wanadoo.fr/polyvalens/clemens/wavelets/wavelets.html\n\nAnd a list of  Internet Sources:\nhttp://www.cosy.sbg.ac.at/~uhl/wav.html
445689
Radio shack has a book (about $20) that has every freq you could ever need in it , even your local #'s
340640
have a look here \n\nhttp://www.winamp.com/
519950
use a solid state amp and the absolute cheapest distortion stomp box you can find. Turn everything up louder than everything else. Oh, maybe learn how to play your instrument
71024
Try here at the bottom.\nhttp://www.musicfromouterspace.com/analogsynth/coolnewlfo.html
905014
Think of a sin wave of low frequency - max slope is pretty low. Now think of a very high frequency sine wave with the same amplitude - the max slope will be much higher.\n\nRead the part about "Filter Response Time" from the link below:
580858
Spectrum analyzer.  See Berkeley Varitronics Systems BUMBLE BEE below has a handheld tool for wireless LAN frequencies of 2.4 GHz.  You can get other instruments for other frequencies -- some spectrum analyzers will frequency sweep.\n\nA very low cost solution, although not quantative, is to use a portable AM radio tuned away from a station and the volume turned up -- carry this around the room or use from your car's radio.\n\nSee the US Frequency Chart below.
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Browse some of these links for ideas, algorithm descriptions, etc., in the comments.\n\n\nhttp://www.google.com/search?q=%22histogram+equalization%22+%22source+code%22+C%2B%2B
556687
2) Use stop wave:\nPlace a speaker of known, variable frequency close to a micro, the micro is connected to a microamperemeter.\nPlace that in the top of a long glass tube, slowly fill the tube with water until the the microamperemeter show a maximum. Continue filling the tube with water to get the next maximum. The distance between the two consecutive maximums is half the wavelength.\nSpeed = wavelength x frequency.\nRepeat the experiment several times and get the averange. That should be close to actual value.
156988
use Advanced WMA Workshop 2.1 \nPowerful audio converter with easy-to-use interface and lots of useful features.
669972
Its impossible design unless you narrow the criteria.\n\nFor example, one needs to know the following\ninput impedance\ninput level\ndesired gain\nallowable phase shift\nbandwidth 3db points\nbandwidth skirts\nallowable THD\npower requirements, unipolar/bipolar\noutput impedance\noutput drive capability\nslew rate\nand many more....\n\nA simple inverting op amp will easily amplify 500Hz signals as well as everything else. If you want something you can play with, check out Linear Technology's or Microchip's website and their filter designer software. Most of it is spice based, and it can give you some ideas, but until you breadboard it, they are just ideas on paper.
556193
Full-wave rectify 60 Hz to get 120 Hz ripple, couple it through a large capacitor to block DC, then low-pass filter with a series L/shunt-C circuit to remove most of the harmonics. You'll have to size the L-C to clean up the waveform adequately without losing too much of the 120 Hz. Or you can apply it to a 120 Hz tank circuit per above answer, but depending on the loading you apply it still may need some cleanup.
135275
depends on what software you're using. i use iMovie for that effect using a plug-in made by Virtix Arsenal.\n\nhttp://www.virtix.com/imovie/products/ArsenalFilters.asp