CEM3310 equivalent circuit

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oldcrow
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Post by oldcrow » Fri Feb 17, 2017 12:50 am

For those interested in a 10HP euro version, I will have DIY PCB board and panelPCB for this EG available sometime in March:
(.fpd panel file as well)

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zackH
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Post by zackH » Fri Feb 23, 2018 12:34 am

Looks amaze balls! did you ever make this? how'd it work out?

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KSS
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Post by KSS » Sat Feb 24, 2018 2:18 am

Crow, the panel shows trig, but it's not on the schematic?

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oldcrow
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Post by oldcrow » Sat Feb 24, 2018 3:10 am

The schematic for the module is slightly different vs. crowbx. With the AS3310 chip being made again, I might make a run of this version for the curious builder, but I will also make a 3310 (chip) version too.
KSS wrote:Crow, the panel shows trig, but it's not on the schematic?

Massimo Ischia
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Re: CEM3310 equivalent circuit

Post by Massimo Ischia » Wed Oct 28, 2020 6:03 am

Hello Guys,
If anyone is still interested in the discrete VC-ADSR circuit, I want to point out that the resistor values in the double expo converter part are not so good, neither in my original schematics nor in the Old Crow's one. I've defined the exact mathematical equations that regulate the attack/decay and release phases, and I recalculated the exact values to have a range from 1ms to 10s (or more). With the correct values, you spare 2 resistors and also improve the temperature dependence.
If anyone is interested please fell free to contact me at "massimo.ischia @ yahoo.it"
Bye

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KSS
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Re: CEM3310 equivalent circuit

Post by KSS » Wed Oct 28, 2020 6:32 am

Massimo Ischia wrote:
Wed Oct 28, 2020 6:03 am
If anyone is interested please fell free to contact me at "massimo.ischia @ yahoo.it"
Please share it here, Massimo Ischia..

Did you also figure out how to add the Trigger input? OldCrow never responded to that part. :(

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The Real MC
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Re: CEM3310 equivalent circuit

Post by The Real MC » Wed Oct 28, 2020 10:22 am

Share it here.
I haz a wrench, to fix da synth.
http://www.analoguediehard.com/

Massimo Ischia
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Re: CEM3310 equivalent circuit

Post by Massimo Ischia » Fri Feb 05, 2021 7:41 pm

Theoretical analysis of the Vc-adsr. Values gives 1ms to 10sec range. Some thoughts regarding a 0-10V control voltage used in my polysynth
Attachments
IMG_20210206_012421.jpg
IMG_20210206_012405.jpg
IMG_20210206_012553.jpg
IMG_20210206_012545.jpg

Massimo Ischia
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Re: CEM3310 equivalent circuit

Post by Massimo Ischia » Fri Feb 05, 2021 7:43 pm

And last but not least, my polysynth that use eight Vc-adsr :hyper:
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IMG_20210113_231046.jpg

Axum
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Re: CEM3310 equivalent circuit

Post by Axum » Sat Feb 06, 2021 4:58 am

Excellent Work Massimo...

tc

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KSS
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Re: CEM3310 equivalent circuit

Post by KSS » Sat Feb 06, 2021 6:43 am

@Massimo
KSS wrote:
Wed Oct 28, 2020 6:32 am
Did you also figure out how to add the Trigger input? OldCrow never responded to that part. :(
Treat utility modules as stars instead of backup singers.
Treat power supplies like Rockstars instead of roadies!
Chase magic sound, not magic parts.

Massimo Ischia
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Re: CEM3310 equivalent circuit

Post by Massimo Ischia » Sat Feb 06, 2021 8:32 am

"trigger input? “ like in the actual 3310 ? I've the spice simulation and is quite easy for me to simulate different arrangements. Let me check...

Massimo Ischia
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Re: CEM3310 equivalent circuit

Post by Massimo Ischia » Sun Feb 07, 2021 4:20 pm

Simulation with trigger input :sb:
Attachments
adsr_trg_in.jpg

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