Marc,<div><br></div><div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Right now I'm trying to do a Jurgen Haible wasp filter clone. I choose<br>
that one because the schematics where easy to find, it runs from 5v<br>
and has filter CV so I can learn about ota's too. I can also think of<br>
hooking it to an arduino or a teensy as mcu and have a small<br>
digital/analog thing to play with.<br></blockquote><div><br></div><div>ok, so for anything "audio" I'd add a 220uF cap as well as the 100nF cap.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
However that one doesn't run properly on 5V DC on the whole audio<br>
range (it 'clips' wierdly, I guess because the op-amp there act<br>
strange when you get close to the rails) and so I need to power it<br>
from 9V and need a 9V->5V regulator for the filter. So I'm planning on<br>
powering the whole thing from 9V and get a 5V voltage out of that.<br>
Note that in any case, anything I do right now will possibly fail but<br>
teach me something.<br></blockquote><div><br></div><div>okdoky, that sounds like a plan.</div><div>you do know that op amps normally need a +ve and a -ve supply?</div><div>i.e. +9v and -9v Unless you're careful with the biasing and you create a "virtual" ground.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
I've got millions of things I want to try after :)<br></blockquote><div><br></div><div>it's addictive.</div><div><br></div><div>Paul</div></div></div>