The Marble Dilemma [3-in-1, electronic switching, vero, yes]

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Cortex
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Re: The Marble Dilemma [3-in-1, electronic switching, vero,

Post by Cortex » 26 Dec 2013, 12:44

Nedalm wrote:Bas u pravo vrijeme! :D
Trenutno crtam smd layout za CMOS switchovanje (invertori + 4013 + 4066). jesi ti koristio 4066 u prethodnoj varijanti? ima li nekih ociglednih mana?
Ima!
Vise nas je doslo do zakljucka da nisu za koriscenje sa od/fuzzevima bilo cime sto generise veliki output. Meni je ovde na Zendrive-u kad idem sa volume-om preko unity gain-a pocinjalo da prdi na debelim zicama, a kako pojacavam volume to sve vise krece neki skrichavi odvratan zvuk i na kraju ne moze ni da se svira, raspada se chip od struje. Kazu neki sa madbean foruma da je sa big muffom na primer, stvar jos mnogo gora, i ispod unity gain-a krece sranje, a iznad da i ne pricamo.
Sa modulacionim efketima nisam imao problema, ovaj phase 90 mi je radio ok, kao i delay ali mi je delay nekad zakucavao nije hteo da se upali po neeeeekad. Sa relejima phase 90 radi cistije i nema pop [sa wicked-om sam imao jako mali pop samo na njemu i pored svih pulldown otpornika] i ceo build je bistriji i prosto bolji jel

Ne znam da li crtas da prilagodis wicked switch ili nesto svoje, ali ovo sa cmos-om u toj wicked switch varijanti je napusteno izgleda for good

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Nedalm
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Re: The Marble Dilemma [3-in-1, electronic switching, vero,

Post by Nedalm » 26 Dec 2013, 13:12

Prokletstvo. Bas sam planirao taj wicked switch da pravim, ali na dijagramu na sajtu fali biasing na 4.5V, i jos par sitnica bi valjalo dodati.

Ta tvoja iskustva su mi cudna, 4066 bi trebao da klipuje kada amplituda signala izadje van opsega napajanja. Sa unity gainom tebi je signal ispod 1V, ni blizu opsega rada 4066.
Jel imas bias signala na 4.5V? ili samo direktno vodis signal na 4066? ako vodis direktno, signal u negativnu stranu ide do -0.5V ili tako nesto, i klipuje se

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Cortex
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Re: The Marble Dilemma [3-in-1, electronic switching, vero,

Post by Cortex » 26 Dec 2013, 13:41

Bem li ga, evo jedan lik pise ovo na temi o wickedu:

"It looks to me like the inputs aren't biased and the supply voltages are ground and +9V. If that's the case, the input swing to the switch can only go to ~-500mV. For even just a Distortion+ type circuit using 1N4148 diodes the output swing can be down to -600mV. Other pedals can go well above that on a large boost. My guitar with active Blackout pickups has a voltage swing bigger than that just from the pickups.

This page by R.G. Keen has info about using the CD4053 for switching. It's a different IC, but I think the I/O characteristics are pretty much the same. http://www.geofex.com/Article_Folders/cd4053/cd4053.htm

If you were doing a pedal that ran a negative supply rail, you could feed the Vss pin from that and I think it would solve any voltage swing issues too."

Sasvim je moguce da si u pravu. Svakako ti isprobaj taj tvoj i obavezno ga probaj sa Muffom i onda cemo znati :) Ako uspes, matori gde nam je kraj :D

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Nedalm
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Re: The Marble Dilemma [3-in-1, electronic switching, vero,

Post by Nedalm » 26 Dec 2013, 14:14

Probacu, i to sam bas mislio da stavim u muff :D javljam rezultate ovih dana

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Cortex
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Re: The Marble Dilemma [3-in-1, electronic switching, vero,

Post by Cortex » 26 Dec 2013, 14:46

do jaja, ako ti proradi onda je stvarno fail sto ne uradise bias, ja se ne setih ni da pogledam, kao jbg lik koji je lansirao taptation valjda misli o tim stvarima i to

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ssmc
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Re: The Marble Dilemma [3-in-1, electronic switching, vero,

Post by ssmc » 27 Dec 2013, 02:09

Ju ju logičkih zavrzlama sa flip-flopovima :hide:

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