what the taplfo (pic microcontroller) provides is a LFO, what a delay "needs" is a resistor value to set its delay time.
you can find the taptation kit (there are other ones) which provide both a microcontroller (the "control" part of the story) and a digital potentiometer.
I've used this:
http://uk-electronic.de/onlineshop/product_info.php?cPath=105_195_352&products_id=3099&osCsid=d1e1c397dcb4ce5dbb17c4e38f81b2ddto modify a Deep Blue Delay, it fits all the PT2399 based delay