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 Forum index » DIY Hardware and Software » The layout factory
MFOS LFO AND SH101 SUBOSC
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isak



Joined: Dec 13, 2009
Posts: 726
Location: Israel
Audio files: 18

PostPosted: Sun Jun 23, 2013 1:32 am    Post subject: MFOS LFO AND SH101 SUBOSC Reply with quote  Mark this post and the followings unread

Hi Guys.

those are my layouts for the mentioned in the headline.
they are both verified and working great.
the LFO is from 0.01hrz to 1.43khz
i advice you to use 1M log for the rate pot, its very gentile when turning.
with the log pot is was ok.
for the putout you may use 100k lin.

those are small pcb designs, you can stuff them in addition to any design your making Wink

enjoy.
Isak E.


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Last edited by isak on Thu Nov 07, 2013 6:27 am; edited 1 time in total
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tokyomatik



Joined: Jan 20, 2011
Posts: 123
Location: berlin
Audio files: 6

PostPosted: Tue Aug 06, 2013 8:11 am    Post subject: Reply with quote  Mark this post and the followings unread

i've just etched and populated the suboscilllator and i really love it
unfortunately i dont get anything from the pulse output but i also dont need it so much. i didnt used a trimmer as u suggested and i didnt found 6.5k resistor but the closest that i had 6.8k worked fine anyway
actually i will use it for the thomas henry xr2206vco
i also added a 100k pot to blend the original signal with the sub.
pretty easy: just connect pin 1 to the original and pin 3 to the sub output; the wiper will be your mixed output

thanks a lot for sharing such an easy but useful layout.
keep up the good work
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isak



Joined: Dec 13, 2009
Posts: 726
Location: Israel
Audio files: 18

PostPosted: Tue Aug 06, 2013 8:29 am    Post subject: Reply with quote  Mark this post and the followings unread

thank you.
nice to see that my work is not for nothing Smile
did you tried the LFO as well?
this LFO is great!

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tokyomatik



Joined: Jan 20, 2011
Posts: 123
Location: berlin
Audio files: 6

PostPosted: Tue Aug 06, 2013 2:25 pm    Post subject: Reply with quote  Mark this post and the followings unread

I will try soon also the lfo, for now i etched already 4 more subosc. pcbs to use for a small analog groove box im building to get the fat bottom i was missing from my square waves
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isak



Joined: Dec 13, 2009
Posts: 726
Location: Israel
Audio files: 18

PostPosted: Wed Aug 07, 2013 1:44 am    Post subject: Reply with quote  Mark this post and the followings unread

cool.

enjoy Smile

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paulstone



Joined: Apr 14, 2013
Posts: 22
Location: ITA

PostPosted: Tue Nov 12, 2013 5:55 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Isak
thanks for this subosc

ciao
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isak



Joined: Dec 13, 2009
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Location: Israel
Audio files: 18

PostPosted: Tue Nov 12, 2013 6:31 am    Post subject: Reply with quote  Mark this post and the followings unread

Your welcome friend Smile
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memorygardens



Joined: Mar 06, 2013
Posts: 7
Location: Cleveland

PostPosted: Mon Apr 07, 2014 7:20 pm    Post subject: Reply with quote  Mark this post and the followings unread

has anyone tried the lfo in 15 volts? I want to add it to my motm rig.
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isak



Joined: Dec 13, 2009
Posts: 726
Location: Israel
Audio files: 18

PostPosted: Mon Apr 07, 2014 8:50 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi there.

Works like a charm with 15V without changing nothing.

Enjoy.

Smile

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alieneYe



Joined: Jul 25, 2008
Posts: 38
Location: Phoenix, Az

PostPosted: Sun Apr 27, 2014 11:09 am    Post subject: Reply with quote  Mark this post and the followings unread

hello all,

i recently found this. thanks for your work on the layouts. that sub osc is very nice.

i too had problems with the pulse output. i fixed it by inserting an 18K pull-down resistor to the pulse output. now the pulse outputs as well as the other two.

the lfo is nice too.

good work again
T
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isak



Joined: Dec 13, 2009
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Location: Israel
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PostPosted: Sun Apr 27, 2014 11:35 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi T

its nice to hear that you got the pulse working!
all you did is connecting the output of the pulse to ground through 18k?

cheers
Isak E.

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alieneYe



Joined: Jul 25, 2008
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Location: Phoenix, Az

PostPosted: Sun Apr 27, 2014 11:46 am    Post subject: Reply with quote  Mark this post and the followings unread

yes sir. works great
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isak



Joined: Dec 13, 2009
Posts: 726
Location: Israel
Audio files: 18

PostPosted: Sun Apr 27, 2014 11:58 am    Post subject: Reply with quote  Mark this post and the followings unread

thank you for this findings.
i never understood why the pulse was not working, maybe i'll remake the board with your 18k resistor.


thank you for your kind words my friend, enjoy the boards.

Isak E.

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memorygardens



Joined: Mar 06, 2013
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Location: Cleveland

PostPosted: Wed Oct 01, 2014 12:07 pm    Post subject: Reply with quote  Mark this post and the followings unread

what switch do you recommend? SPDT?
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isak



Joined: Dec 13, 2009
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Location: Israel
Audio files: 18

PostPosted: Wed Oct 01, 2014 1:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi Smile

If you mean the subosc then yes SPDT is fine.

Enjoy,
Isak E.

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memorygardens



Joined: Mar 06, 2013
Posts: 7
Location: Cleveland

PostPosted: Wed Oct 01, 2014 6:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

i mean the lfo. i want it to be a quad lfo in motm format
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isak



Joined: Dec 13, 2009
Posts: 726
Location: Israel
Audio files: 18

PostPosted: Wed Oct 01, 2014 11:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

For choosing the waveshapes Youll need spdt.
for the HIGH / LOW you can use spst or spdt.

Enjoy,
Isak E.

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