4740 ADSR

On ADSR modules the manual trigger was unreliable. Sometimes the envelope would not start when the button was pushed, sometimes there was multiple triggers. I replaced the trigger push-buttons with new ones. The Elfa number 35-080-42 is  the same or very similar. When replaced, the behaviour was a lot better but I still get the occasional double trigger. I guess this kind of switch is kind of low quality and have some contact bounce.

One of the modules was missing the attack LED, so I replaced both the Attack and Decay LEDS with nes ones. I didn't find exactly the right type, but the ones I used fits in the panel holes and looks OK from the outside. Unfortunately I forgot the exact part I used.

I attempted to trim the modules. It was easy to set the peak level to 5 volts, but I could not get the sustain to go all the way down to zero. Also, when setting the sustain near maximum, the sustain voltage was not stable but slowly rising above 5 volts. I will have to get back to this later.