LFO-10 4HP lfo by FEEDBACK

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strat-1
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LFO-10 4HP lfo by FEEDBACK

Post by strat-1 »

www.feedbackmodules.com

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This is the easy to use but versatile LFO your modular synth will love :) :) :)
It is a great compromise between simplicity, user friendliness and enough features to make it special.

This little module is an evolution of the LFO of the famous MS monophonic synth from the seventies, adapted to eurorack format.
The original MS LFO had a FREQUENCY knob, a WAVEFORM knob and separate outs for PULSE and TRIANGLE waveforms.
We added some features to make it even better. We extended the FREQUENCY range with a switch, making it work now from 18mHz to 24Hz. Both outputs now are buffered so they have enough current to drive more destinations at the same time (without loading and distorting the waveforms). Both outputs now have their own LEDs, red for PULSE wave and bicolour red/green for TRIANGLE wave.
The main feature of this LFO is the WAVEFORM knob that will change progressively the shape of the waveforms:
- at the TRIANGLE output from SAW (CCW) to TRIANGLE (centre position) to RAMP (CW)
- at the PULSE output from 5% (CCW) to 50% SQUARE WAVE (centre position) to 95% (CW).

Tech specs:
- 4HP width
- 35mm depth behind front panel including the power connector
- 2X control pots for FREQUENCY and WAVEFORM
- 1X FREQUENCY RANGE switch: LOW and HIGH
LOW - 18mHz (55sec) - 0,7Hz (1.4sec)
HIGH - 0,63Hz (1.6sec) - 24Hz (42msec)
- 2X outputs : SQUARE 0/10V Vpp and TRIANGLE -5V/5V Vpp
- standard 10 pin euro power +12V / -12V
- power consumption +12V 20mA , -12V 15mA


https://www.modulargrid.net/e/feedback-lfo-10

Attachments
LFO-10 - User Manual.pdf
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Last edited by strat-1 on Tue Jun 07, 2022 11:04 am, edited 4 times in total.
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Re: LFO-10 4HP lfo by FEEDBACK [NEW module]

Post by strat-1 »

I made some videos demonstrating the features of LFO-10 module.



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Re: LFO-10 4HP lfo by FEEDBACK [NEW module]

Post by strat-1 »

I made a pdf manual explaining the functions of LFO-10 adsr.

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LFO-10 - User Manual.jpg
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Re: LFO-10 4HP lfo by FEEDBACK [NEW module]

Post by strat-1 »

New video for ENV-310/ENV-100/LFO10 by COLOR MY SOUND :)

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Re: LFO-10 4HP lfo by FEEDBACK [NEW module]

Post by moremagic »

positive only square wave lfo? leme say Hell Yeah, i hate playing bipolar square lfos
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Re: LFO-10 4HP lfo by FEEDBACK [NEW module]

Post by 1Dj4P's »

Hi,
I finished a DIY LFO module, it works fine. I found the forecast range of frequencies, the voltage is 0 / 10V for square but I only found -2/+2V for triangle. I tried to switch R8 with R9 (100k & 150K), but I still got 2V instead of 5V in the manual. Did someone encounter the same difference ? Any advise will be appreciate ≥ thanks
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Re: LFO-10 4HP lfo by FEEDBACK [NEW module]

Post by kallikak »

See what you measure at pin 10 of the TL074, then work out what values you need for R8 and R9 as for any non-inverting op-amp.

Check if you've shorted pins 8 and 9 so it's not amplifying maybe?
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Re: LFO-10 4HP lfo by FEEDBACK [NEW module]

Post by 1Dj4P's »

Thanks for your answer kallikak,
kallikak wrote: Fri Sep 03, 2021 11:39 pm See what you measure at pin 10 of the TL074, then work out what values you need for R8 and R9 as for any non-inverting op-amp.

Check if you've shorted pins 8 and 9 so it's not amplifying maybe?
No short between pins 8 & 9.
I measured 3,85Vpp at pin 10 with triangle wave but I'm not sure how to calculate the R8 and R9 values. I was thinking the values from the build manual are right.
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Re: LFO-10 4HP lfo by FEEDBACK [NEW module]

Post by 1Dj4P's »

Finally, I got the answer from strat one :

"The first batch of LFO pcbs required a bridge. I made the bridge on all the boards before sending them.
Maybe I skipped the bridge on your boards ?
Make a link like in the picture.
First check with a multimeter if it's ground on both vias. If it is gnd on both vias you don't have to make
the bridge, it's the next generation of pcbs.
Al the values of the parts are correct."
Attachments
LFO-10 - GND Bridge.jpg
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Re: LFO-10 4HP lfo by FEEDBACK [NEW module]

Post by kallikak »

Makes sense. The amplification factor is 1 + R8/R9, so if R9 isn't connected to ground there's no amplification (the other possibility was R8 shorted and hence 0 resistance).
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Re: LFO-10 4HP lfo by FEEDBACK [NEW module]

Post by strat-1 »

We have a 24h PROMO for LFO-10 Module. Check the website :)
www.feedbackmodules.com
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Re: LFO-10 4HP lfo by FEEDBACK [PROMO]

Post by Peng33 »

Is this over now? Added the LFO and it does not come off at checkout...trying to purchase a 70€ module, which is over the minimum requirement.

Edit: I went to PayPal for payment to see if when it sent me back to your site, if it would reduce the price by 40€, but instead it made the purchase that I was not ready to make yet. So it charged me full price for both, and I am still not sure if the 10 free ones have already been claimed.
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Re: LFO-10 4HP lfo by FEEDBACK [PROMO]

Post by bassg »

Peng33 wrote: Thu Jun 02, 2022 9:09 am Is this over now? Added the LFO and it does not come off at checkout...trying to purchase a 70€ module, which is over the minimum requirement.

Edit: I went to PayPal for payment to see if when it sent me back to your site, if it would reduce the price by 40€, but instead it made the purchase that I was not ready to make yet. So it charged me full price for both, and I am still not sure if the 10 free ones have already been claimed.
Hmm, I'm not sure now either - I planned to get the ENV100, and indeed the LFO was not added automatically to my cart, but my feeling is that when you purchase an eligible module (priced over 49 EUR), they will simply send it to you together with the module you bought. The 10 pieces limit seems to be for the actual purchase, i.e. you can buy 10 modules priced over 49 EUR and you'll get 10 LFOs. At least that's how understand the promo, could be I got it all wrong, though. :-D
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Re: LFO-10 4HP lfo by FEEDBACK [PROMO]

Post by strat-1 »

bassg wrote: Thu Jun 02, 2022 9:58 am
Peng33 wrote: Thu Jun 02, 2022 9:09 am Is this over now? Added the LFO and it does not come off at checkout...trying to purchase a 70€ module, which is over the minimum requirement.

Edit: I went to PayPal for payment to see if when it sent me back to your site, if it would reduce the price by 40€, but instead it made the purchase that I was not ready to make yet. So it charged me full price for both, and I am still not sure if the 10 free ones have already been claimed.
Hmm, I'm not sure now either - I planned to get the ENV100, and indeed the LFO was not added automatically to my cart, but my feeling is that when you purchase an eligible module (priced over 49 EUR), they will simply send it to you together with the module you bought. The 10 pieces limit seems to be for the actual purchase, i.e. you can buy 10 modules priced over 49 EUR and you'll get 10 LFOs. At least that's how understand the promo, could be I got it all wrong, though. :-D
I corrected this with an explanation on the front page of the website!

"Don't put the LFO in the basket, just buy any other module and we will add it in the box."
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Re: LFO-10 4HP lfo by FEEDBACK [PROMO]

Post by strat-1 »

bassg wrote: Thu Jun 02, 2022 9:58 am i.e. you can buy 10 modules priced over 49 EUR and you'll get 10 LFOs.
The LFOs are limited one per order, you will receive just one LFO if you buy multiple modules in the same order :)
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Re: LFO-10 4HP lfo by FEEDBACK [PROMO]

Post by Peng33 »

strat-1 wrote: Thu Jun 02, 2022 12:11 pm I corrected this with an explanation on the front page of the website!

"Don't put the LFO in the basket, just buy any other module and we will add it in the box."
Just noticed the refund on my order. Thanks for the quick response. Cannot wait for them...these will be my fourth module from you...love my 1Bit Multitap, and really digging my Punk module.

Edit to add that these promos are what caused me to buy the 1Bit Multitap, and even though I missed the Punk promo by a day, I still bought one. It was a good price, and Feedback stuff is incredibly good quality. TL; DR - If I catch your next promo in time, it will probably result in another purchase. Heh.
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bassg
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Re: LFO-10 4HP lfo by FEEDBACK [PROMO]

Post by bassg »

strat-1 wrote: Thu Jun 02, 2022 12:13 pm
bassg wrote: Thu Jun 02, 2022 9:58 am i.e. you can buy 10 modules priced over 49 EUR and you'll get 10 LFOs.
The LFOs are limited one per order, you will receive just one LFO if you buy multiple modules in the same order :)
Yeah, that definitely makes sense - thanks for clarification! :)
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Re: LFO-10 4HP lfo by FEEDBACK [PROMO]

Post by Muff McMuff »

Just visited the website the LFO promo has ended, all sold out.
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Re: LFO-10 4HP lfo by FEEDBACK

Post by Peng33 »

Just got the Static and LFO in the mail yesterday. Already love both. The LFO is the most tweakable, playable LFO I have, and the Static is a wonderful percussion source. Great modules. I now have four Feedback Modules...ermmm modules, and they are slowly turning into one of my favorite, underrated module companies. Love what you guys do. I will anxiously await your next sale and hope I have some monies saved up...
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