pt2399 question

mike page · Joined: Sep 26, 2016 Posts: 113 Location: norwich, uk

Hiya, is it possible to modify the basic pt2399 delay circuit so that it only outputs the delayed signal. So just wet signal and just one repeat. Any thoughts?

Here is the basic schematic :

http://www.diyaudiocircuits.com/wp-content/uploads/2012/09/pt2399_echo_app_circuit.png

mike page · Joined: Sep 26, 2016 Posts: 113 Location: norwich, uk

I worked it out. You can get the wet signal straight out of pin14.

wackelpeter · Posted: Sun Aug 20, 2017 11:55 pm Post subject:

Good that you find it yourself, but possibly this is useful for your needs too:

http://www.bernacomp.com/elec/og2/echo_delay.pdf

Scott Bernardi's VC Delay... you can easily follow the signal paths in the schematic and see how it works.

mike page · Joined: Sep 26, 2016 Posts: 113 Location: norwich, uk

cool thanx

Grumble · Posted: Mon Jul 09, 2018 11:33 pm Post subject:

https://www.electrosmash.com/pt2399-analysis

MapacheRaper · Joined: Feb 15, 2018 Posts: 63 Location: Spain

I was wondering the same. Cool, i¨ll check it.

Regarding feedback: Im using a cheap chinese module with doesn´t implement feedback.

I have tried to mix the output into the input via a pot, but it seems is not working. Im quite newbie. Do you need opamps to get feedback, isn´t, or can be done directly in the standard datasheet circuit?

The electrosmash analisys states that you can get feedback via one pot and a cap between the 14-16 pins. Nice

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.