MFOS LFO AND SH101 SUBOSC

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

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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tokyomatik · Posted: Tue Aug 06, 2013 8:11 am Post subject:

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

isak · Posted: Tue Aug 06, 2013 8:29 am Post subject:

thank you.
nice to see that my work is not for nothing Smile

did you tried the LFO as well?
this LFO is great!

tokyomatik · Posted: Tue Aug 06, 2013 2:25 pm Post subject:

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

isak · Posted: Wed Aug 07, 2013 1:44 am Post subject:

cool.

enjoy Smile

paulstone · Joined: Apr 14, 2013 Posts: 23 Location: ITA

Hi Isak
thanks for this subosc

ciao

isak · Posted: Tue Nov 12, 2013 6:31 am Post subject:

Your welcome friend Smile

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

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

isak · Posted: Mon Apr 07, 2014 8:50 pm Post subject:

Hi there.

Works like a charm with 15V without changing nothing.

Enjoy.

Smile

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

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

isak · Posted: Sun Apr 27, 2014 11:35 am Post subject:

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.

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

yes sir. works great

isak · Posted: Sun Apr 27, 2014 11:58 am Post subject:

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.

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

what switch do you recommend? SPDT?

isak · Posted: Wed Oct 01, 2014 1:55 pm Post subject:

Hi

If you mean the subosc then yes SPDT is fine.

Enjoy,
Isak E.

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

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

isak · Posted: Wed Oct 01, 2014 11:55 pm Post subject:

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

Enjoy,
Isak E.