[sdiy] BBD help

[Ken Stone]

Oh - also if you wired it up per their app not, it probably wouldn't work
unless you notice the design error. Technically the circuit is correct, but
the RAM is shown mirror image. Obviosuly they intended for the ram to be
easy to wire, but the chip designer got the connections in reverse order.

Ken

>My circuit uses the PT2399, not the PT2395. The difference is that the
PT2399 has 64K memory built in, the PT2395 requires an external DRAM chip.
You can get longer delays with the PT2395 by using a 256k DRAM. I wasn't
able to get a circuit working, with the PT2395 however. I was successful
with the PT2399.
>Also, the minimum delay is about 30mSec which sounds longer than you
wanted. It's really meant for an echo unit, not a chorus/flange.
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au  
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>