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 Forum index » DIY Hardware and Software » YuSynth
ADSR BS170 Addition
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Hubaswift



Joined: Jul 06, 2016
Posts: 37
Location: Canada

PostPosted: Fri May 26, 2017 8:03 pm    Post subject: ADSR BS170 Addition Reply with quote  Mark this post and the followings unread

I was surprised to find that when I went to start populating the ADSR PCB today, that there was a BS170 that wasn't there last time I built the circuit. I don't have any BS170 lying around, so I was wondering if to get it running I could wire pin 7 of the 7555 to the sustain potentiometer to bypass the JFET. Would that work?
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yusynth



Joined: Nov 24, 2005
Posts: 1298
Location: France

PostPosted: Sat May 27, 2017 7:02 am    Post subject: Reply with quote  Mark this post and the followings unread

Yes it would and it was the case on the previous version. This FET was added to ensure that the DECAY path be deactivated when the GATE returns to 0V and that the cap will only discharge through the RELEASE path.
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Hubaswift



Joined: Jul 06, 2016
Posts: 37
Location: Canada

PostPosted: Sat May 27, 2017 4:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

Alright, thanks!
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ricochet



Joined: Oct 03, 2017
Posts: 1
Location: Münster, Germany

PostPosted: Tue Oct 03, 2017 3:21 am    Post subject: Reply with quote  Mark this post and the followings unread

Hello
am I right, that this is the latest version of ADSR-PCB ?!:
"ADSR 2017 wiring" and "ADRS FINAL Layout 2017" (from Yusynth-site)

Now I've got six ready etched ADSR PCBs (and others) from a friend.

They don't look like that obove, but after all I've found some more (older?) PCBs layouts in the net.

My Questions:
Could I use / build these old one ?
Are there any mistakes in it ?

so long
Gerd


ADSR 2017 wiring.jpg
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wiring for "Final layout"
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ADSR 2017 wiring.jpg



ADSR-FINAL-LAYOUT 2017.jpg
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from Yusynth page "ADSR final Layout (2017)
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ADSR-FINAL-LAYOUT 2017.jpg



ADSR-V2-wiring.jpg
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this pcb I have
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ADSR-V2-wiring.jpg



ADSR-wiring.jpg
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another old version
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ADSR-wiring.jpg


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yusynth



Joined: Nov 24, 2005
Posts: 1298
Location: France

PostPosted: Tue Oct 03, 2017 3:59 am    Post subject: Reply with quote  Mark this post and the followings unread

You may build those they will fine as well, the latest version is an improvement and the inclusion of a print an Eurorack psu socket.
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