Members Mad Hatter Posted November 21, 2007 Members Share Posted November 21, 2007 I found one of these dirt cheap, it has MN3205 chips in it, with some tweaking I believe it can do about 400 ms of delay. However, the thing hums like mad when I use a power adapter. I tried several, it just hums. I am guessing it is a ground issue. Anyone know where I can find the schematics for these? The delay isn't that bad with a battery, but the battery doesn't last long. Link to comment Share on other sites More sharing options...
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