[PROJECT] The Earwig - Rectifying Mixer [Available]

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plankton
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[PROJECT] The Earwig - Rectifying Mixer [Available]

Post by plankton » Thu Jul 24, 2014 2:03 pm

EDIT: 14/11/14


Kits and full modules available


EDIT: 15/10/14

Assembly tutorial:

http://www.planktonelectronics.com/docs ... ly.pdf.zip


EDIT: 14/10/14

More demos:





EDIT: 10/10/14

BOM, schematics, and more info:

www.planktonelectronics.com/the-earwig/

EDIT: 10/10/14

PCBs and Panels Available at http://store.planktonelectronics.com/ca ... s/1819.htm

Documents (BOM, Schematics, ...) will be available during the next hours at www.planktonelectronics.com

Kits and assembled modules soon.

EDIT: 26/07/14

Demo!:

The demo is for a single channel. Mainly playing with 2 oscillators.

I ill order the last PCB today to check that all the changes are fine and go for product¡on.

*****************************************************

Here it is the next eurorack module for Plankton Elec. The Earwig!

Each module have 2 channels. Each channel follows the sequence: Gain -> Bias -> Rectify (bypass, positive half wave inverted, negative half wave inverted and full rectify inverted) -> Phase inverter -> Bias -> individual output or mix control to the mixer outputs.

The mixer outputs are a standard summing mixer, and a difference mixer.

2 CV Bias inputs per channel.

The whole module accepts AC and DC signals, no AC coupling anywhere.

The prototype is working very well! Very useful to create a variety of changing waves from the standard outputs of a single oscillator. Using different waves to the bias inputs create nice movement. Also very useful for modify envelopes, LFOs, external sounds, whatever you want.

Waiting for the new potentiometers and it will be released soon!

Single PCB with no wiring and standard parts (except for the slide switches).

:guinness:
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The earwig.jpg
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Last edited by plankton on Fri Nov 14, 2014 4:42 am, edited 10 times in total.

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oberkorn
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Post by oberkorn » Thu Jul 24, 2014 3:59 pm

nice one!
please post some demos :party:
you have to pay for the music but the noise is free

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thresholdpeople
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Post by thresholdpeople » Thu Jul 24, 2014 7:34 pm

Awesome. Looking forward to seeing and hearing more!

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FetidEye
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Post by FetidEye » Fri Jul 25, 2014 3:22 am

cool!
sounds would help :party:

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Post by roglok » Fri Jul 25, 2014 4:46 am

The whole module accepts AC and DC signals, no DC coupling anywhere.
looks cool. but i guess you mean no AC coupling anywhere? :hmm:

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plankton
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Post by plankton » Fri Jul 25, 2014 10:44 am

Quote:
The whole module accepts AC and DC signals, no DC coupling anywhere.


looks cool. but i guess you mean no AC coupling anywhere? hmmm.....
Yes, I mean AC coupling! It's updated.

I'm going to record some demos right now.

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plankton
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Post by plankton » Sat Jul 26, 2014 4:18 am

Demo uploaded!


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Post by FetidEye » Sat Jul 26, 2014 4:36 am

Great!!

I like the visuals :) at 3.41 it looks like ocean waves. very nice.

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Post by bartleby » Sat Jul 26, 2014 5:19 am

cool.
have you considered adding vc over gain - i.e. incorporate two vcas?
(can't have enough of those)

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plankton
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Post by plankton » Sat Jul 26, 2014 5:38 am

Great!!

I like the visuals smile at 3.41 it looks like ocean waves. very nice.
There is plenty of plankton in the ocean. :tu:
cool.
have you considered adding vc over gain - i.e. incorporate two vcas?
(can't have enough of those)
There is no more room for adding vca's. This is a single PCB project and the board is overpopulated. Some of the decoupling caps for the ICs are at the reverse side of the board. Inside the IC footprint! I wish to add more and more features but I have to control that. :) Adding VCA's means adding OTAs and a lot of components.

:vcas:
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bartleby
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Post by bartleby » Sat Jul 26, 2014 5:49 am

how about making it a 2-pcb sandwich thing, then?
might be worth it.
just an idea though...

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plankton
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Post by plankton » Sat Jul 26, 2014 5:57 am

Not for this one. I'm sorry. It's almost finished and you can use an VCA before or after the Earwig getting the same results. The main feature here is the rectification and want to keep things simple with this.

Adding the VCA means adding more inputs and making the panel and the PCB bigger also.

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Post by plankton » Sat Jul 26, 2014 5:58 am

But thank you for your ideas!

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Post by latigid on » Sun Jul 27, 2014 4:50 am

Looks very cool indeed! Just two questions: What is the usable frequency range of the recitifier circuit? The harmonics are very nice but it would be pretty cool as an LFO too. What is the origin of the clicks when switching modes? Can they be damped out with some cap filtering? Or is it more like the output waveform resetting at a non-zero crossing point?

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Post by plankton » Sun Jul 27, 2014 5:20 am

The frequency of the rectifier circuit goes from DC to above 20Khz, so you can use any signal you want. LFOs will work pretty well here. And envelope signals too. You can plug a simple 2 stage attack release envelope and turn it into 4 stage envelope if you full rectify it. Or the output of a sequencer. Biasing and rectifying it you can turn the lower values into high ones. Adding come VC to the bias will add movement to it. Or just plug a full patch inside for distort it.

I will record complete demos with 2 screens when the final unit is done.

About the click noise is impossible to control since as you say the wave is reseting to 0. But this is the function itself!

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Post by ChrisR » Wed Sep 10, 2014 9:05 am

Any news on this? :)
Buy the ticket - take the ride.

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Post by plankton » Wed Sep 10, 2014 10:03 am

For sure!

PCBs are here. It arrived yesterday. It looks nice.

Panels will arrive soon.

I guess the units will be available early october!
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Post by windspirit » Wed Sep 10, 2014 6:17 pm

Gotta say I thought it was an interesting idea, after seeing the demo I definitely want one.

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Post by ChrisR » Thu Sep 11, 2014 6:50 am

Thanks for the update! :tu:
plankton wrote:For sure!

PCBs are here. It arrived yesterday. It looks nice.

Panels will arrive soon.

I guess the units will be available early october!
Buy the ticket - take the ride.

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Post by plankton » Tue Oct 07, 2014 12:21 pm

This is very close to be released! With luck, this week.
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Post by frozenkore » Wed Oct 08, 2014 2:40 pm

Is it too late to get to in on this?
Cheers!
Brian

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Post by plankton » Thu Oct 09, 2014 3:11 am

No, I don't make closed lists for this projects. It will be available this friday. Just PCBs and panels. Kits and assembled modules will take a little bitmore

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Post by frozenkore » Thu Oct 09, 2014 7:53 am

Awesome, thanks!
Cheers!
Brian

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plankton
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Post by plankton » Fri Oct 10, 2014 5:16 am


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Post by plankton » Fri Oct 10, 2014 10:51 am

BOM, schematics, and more info:

www.planktonelectronics.com/the-earwig/

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