Somebody, not I, wrote a [delayed action oscillator](https://github.com/azimuth-project/SDEModels/tree/master/azimuth-sde-models/src/main/java/org/azimuthproject/enso/delayedoscillator) as an Azimuth code project in Java; it built for me but I was only testing and never used it before transferring it from a google code repo to github.

[Here](http://www.azimuthproject.org/azimuth/show/ENSO#DelayedActionOscillator)'s the relevant Azimuth wiki page with ENSO references and some other open ie. suggested Azimuth projects are [here](http://www.azimuthproject.org/azimuth/show/Open+projects). DAO is marked as closed but only in the sense that some code was written: further code would be great.