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Old 10th October 2002, 01:08 AM   #1
JohnR is offline JohnR  Australia
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Default Generic active filter / crossover... board... thingie...

Hi folks, I'm looking for or thinking about making a small circuit board that can be used as a "building block" for a bunch for projects I have in mind. eg active crossovers, dipole eq, and "bass management" for HT. My thought was to have a module with a (high quality) dual op-amp, power filtering, and a layout that would accomodate a reasonable number of filter configurations, and use as many as needed to realize each of the above projects. I am aware of the Linkwitz boards but these seem a bit complex for what I want to do.

Any thoughts on this? Does such a thing exist? I have attached a possible "generic schematic" of such a board. Here's a link from rljones which gives a way to get these made if I/we designed the layout my/ourselves. Possible group buy?

Some PCBs

JohnR
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Old 10th October 2002, 01:09 AM   #2
JohnR is offline JohnR  Australia
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Erm... where did the schematic image go? Trying again...
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Old 13th October 2002, 11:00 PM   #3
JohnR is offline JohnR  Australia
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Hm, any interest in this idea here?

I've added a couple more parts to the circuit above. With that this board would work for a pretty good range of filter types. I'm thinking I will use the "miniboard" size of 2.5 x 3.8. The board would be double-sided with a ground plane.

JohnR
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Old 13th October 2002, 11:33 PM   #4
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Do you ever get the idea that you're talking to yourself?
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Old 14th October 2002, 08:51 PM   #5
JohnR is offline JohnR  Australia
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Not any more...

Are you saying you don't think it's a good idea?

JohnR
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Old 14th October 2002, 10:13 PM   #6
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No, I think it's a good idea.

You should be able to go to fourth order on the board. It should be two channel. It should run off of 2 9v batteries. It should contain RCA input and output jacks. The frequency adjusting components should be solderable to terminal posts (not the board) for frequent changing. Gain must be adjustable.

As to a group buy on the boards, I don't know. Not for me though.
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