[sdiy] EG

[IWAKUNI Kaoru]

Hello, Niklas & All!

 This is my first post to this list from Japan.

 I think you need a resistor between 4016 pin 12 and ground,
 to discharge input capacitance of 4016 IC.
 (100k ohm may be OK.)
 When 2 diodes are all off, 4016 pin 12 becomes floating.
 I'm not sure but it can be a cause of your problem.

// Kaoru : sorry for may bad English!

----- Original Message -----
From: "Rönnberg, Niklas" <nikro at itn.liu.se>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Thursday, March 06, 2003 12:26 AM
Subject: [sdiy] EG


> Hello!
>
> Some days ago I dragged out my old project, the Littleman. It's based on
> the Paia Fatman VCO and some Tom G circuits. I got some problems with the
> EG. The Release is working quite ok, and the Sustain to. But I have some
> serious problem with the Attack. The Attack is working nice for a few
> seconds after you have turned on the power, but then it doesn't work at
> all. No changes on the Attack knob makes any changes in the envelope. So
> when you turn on the synth you can have a short and nice attack time or a
> slow, but after a few seconds you can't control the attack at all. But then
> you can make slower attack times using the Decay knob, but I don't want it
> this way...
>
> Can anyone help me out?
>
> You can find the schematic here:
> http://www.itn.liu.se/~nikro/diy/littleman/littleman.pdf
>
> Thanks!
>
> /Niklas
>
>