Cheap delay chips AU

Parts Archive
1

http://oatleyelectronics.com/bcorner2.html

sm7183

DIGITAL ECHO CHIP: SM7183 is an audio echo processor using CMOS technology.  It has built-in AD / DA and 30KBits SRAM for time delay.  Features direct control & micro-processor control interface , adjustable delay time setting: Echo mode 20.5ms ~ 163.8ms, Surround mode: 4.1ms ~ 41ms. Click here  for data sheet. $6

Admittedly it’s a short delay time, but perhaps a few of them could be strung together - multitap?

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Hi,

You can probably abuse it’s “oscillator resistor” pin6 as Scott Bernandi has done with PT2399 echo to get longer (and more distorted) delays :wink:

http://home.comcast.net/~sbernardi/elec/og2/og3_echo.html

Bye, Moebius

3

Ahhh, the PT2399.  I hate to admit it, but I think those are still available for purchase at Small Bear Electronics.  I really need to get some of those chips sometime…