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 Forum index » DIY Hardware and Software » The layout factory
Simple dual A(S)R
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Strazdas



Joined: Apr 21, 2010
Posts: 40
Location: Kaunas, Lithuania

PostPosted: Wed Nov 09, 2011 5:16 am    Post subject: Simple dual A(S)R
Subject description: PCB and schematics
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Hi folks,

After some time with Eagle made this PCB of simple dual A(S)R. Idea is taken from old russian Radio 1992 magazine, but addopted to modern modular needs Smile

All diodes n4148.
With trimmers R13, R20 you set max EG voltage (you may vary from near 15V to 0V).
With R1 and R2 you set GATE voltage (now it's +0,9V), for ±12V users calculate your own needs.
Will work with ±12V PSU.

NOT TESTED! but breadboarded and tested with +8V with no op-amps as on original schematics (it uses russian K176 series CMOS with operational voltage max +9V)

What next?! Will test on breadboard soon and make PCB for miself too. Smile


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Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Wed Nov 09, 2011 12:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi - I'm a little bit confused regarding the function of this circuit.

If I'm following the schematic correctly, it looks like one A/R is triggered on the positive edge of the Gate, and the other is triggered on the falling edge.

Is that right? What's the intention of doing that?

{edit} - Hang on - I just noticed that one A/R is based on the Q of a flip flop, but the other is based on Q/, so effectively both stages are triggered at the same time. I don't understand why they didn't just make both stages work the same way. What am I missing here?

Thanks
Gary
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Strazdas



Joined: Apr 21, 2010
Posts: 40
Location: Kaunas, Lithuania

PostPosted: Sat Nov 12, 2011 1:51 am    Post subject: Reply with quote  Mark this post and the followings unread

Mongo1 wrote:
Hang on - I just noticed that one A/R is based on the Q of a flip flop, but the other is based on Q/, so effectively both stages are triggered at the same time. I don't understand why they didn't just make both stages work the same way. What am I missing here?

Thanks
Gary


Nothing missed, just it was easy to route PCB this way. By the way, original schematics made this way too. Original copy from Radio magazine will post on my www soon.

By the way, I made v2 for the schematics. There will be inverted output for A(A)R 1.

Mykolas

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Strazdas



Joined: Apr 21, 2010
Posts: 40
Location: Kaunas, Lithuania

PostPosted: Tue Nov 15, 2011 5:37 am    Post subject: Reply with quote  Mark this post and the followings unread

Ok, copy of original article on Radio magazine posted here: (page no more available)

Simples VCA for square wave ever is 4010 or 4009 (inverted) cmos! Example is here: (page no more available)

By the way, I tryed VCO on breadboard, no luck with v/oct tracking.

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Last edited by Strazdas on Thu May 17, 2012 1:07 am; edited 1 time in total
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Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Tue Nov 15, 2011 6:18 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for posting that -

One thing I learned - Google still has a long way to go when translating Lithuanian to English. Reading the article I was alarmed to see that someone 'fell on the keyboard'. I hope they didn't get hurt Laughing

Gary
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dark000arena



Joined: Aug 09, 2008
Posts: 8
Location: wirral

PostPosted: Tue Nov 15, 2011 9:34 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for the share strazdas. is your pcb layout for one ASR or two?, and if its for two where do the second set of pots connect up? forgive my ignorance but this looks like an ideal project for someone like me and i want to be sure i know what i am building.
cheers
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Strazdas



Joined: Apr 21, 2010
Posts: 40
Location: Kaunas, Lithuania

PostPosted: Wed Nov 16, 2011 3:44 am    Post subject: Reply with quote  Mark this post and the followings unread

Mongo1 wrote:
Thanks for posting that -

One thing I learned - Google still has a long way to go when translating Lithuanian to English. Reading the article I was alarmed to see that someone 'fell on the keyboard'. I hope they didn't get hurt Laughing

Gary


No prob.

Lithuanian is really hard to translate with such engines like Google and so (it'll tike some time do do it properly).
And if there will be interest in translating do questions in "Comment" field and I'll answer in English. I'll not translate my full articles in English due to little time.

Mykolas

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Strazdas



Joined: Apr 21, 2010
Posts: 40
Location: Kaunas, Lithuania

PostPosted: Wed Nov 16, 2011 3:52 am    Post subject: Reply with quote  Mark this post and the followings unread

dark000arena wrote:
Thanks for the share strazdas. is your pcb layout for one ASR or two?, and if its for two where do the second set of pots connect up? forgive my ignorance but this looks like an ideal project for someone like me and i want to be sure i know what i am building.
cheers


The PCB is for two A(S)R! Second ATTACK pot is mounted on PCB (see 'values' file) and RELEASE is connected to CN4 socket.

By the way - in couple of days I'll post V2 of the project, where you will have inverted OUT1.

Keep watching Smile

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Strazdas



Joined: Apr 21, 2010
Posts: 40
Location: Kaunas, Lithuania

PostPosted: Thu Nov 24, 2011 5:27 am    Post subject: Reply with quote  Mark this post and the followings unread

Ok, this is V2 of dual A(S)R.

I added inverted A(S)R 1. If you like 0 - -10V inversion, remove R18. Otherwise it will work as +10 - 0V EG. (idea is taken from YuSynth ADSR)

Timing caps are C2 & C4 (tantalum are best), but you can change them for your needs or make swich for diferent timing eg. FAST-SLOW-MEDIUM as shown in MFOS dual EG.

Front Panel file is here: http://www.analogas.uzrasai.lt/wp-content/uploads/2011/11/k176 2xA(S)R v2.fpd.

Hope it'll helps.

Mykolas


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