CMOS ADSR

fonik · Posted: Sat Sep 15, 2012 11:27 am Post subject:

so woody, any comments on this?

fonik · Posted: Fri Dec 07, 2012 6:26 am Post subject:

okay. i got thomas blessing to do PCBs for the other new projects, too. the CMOS ADSR will be the next one.

i just wanted to let you all know what is coming. i will design the PCB in the next weeks. the 555-VCO will be published in january, so i don't think the ADSR will come before february (have to order/build prototypes).

anyways, please don't place pre-orders here. much too early in the process Cool

Paradigm X · Joined: Feb 15, 2011 Posts: 252 Location: Null and void

Wow, great news mattias. Im thinking of building an all TH/fonik synth, got most of the pcbs already!

All the best, look forward to it.

Cheers, Ben

ungleichklang · Joined: Dec 03, 2011 Posts: 62 Location: East-Belgium

I'm not allowed to post pre-orders for nor the ADSR neither the 555-VCo here
I'm not allowed to post pre-orders for nor the ADSR neither the 555-VCo here
I'm not allowed to post pre-orders for nor the ADSR neither the 555-VCo here
I'm not allowed to post pre-orders for nor the ADSR neither the 555-VCo here
I'm not allowed to post pre-orders for nor the ADSR neither the 555-VCo here
I'm not allowed to post pre-orders for nor the ADSR neither the 555-VCo here
I'm not allowed to post pre-orders for nor the ADSR neither the 555-VCo here
...............
..............

Smile

but if I would be allowed I would pre-order ... Smile

Your my hero Matthias

lucid · Joined: Dec 03, 2012 Posts: 16 Location: Slovakia, EU

Hi fonik
any news with pcb?
Need some more LEDs to light up my new case.
milan

fonik · Posted: Sun Mar 17, 2013 2:54 pm Post subject:

i will receive missing parts later this week, then i will be able to test what i built up so far...

Uncle Krunkus · Posted: Wed Mar 20, 2013 4:16 am Post subject:

Wouldn't stage gate outputs plus a CV mixer allow the cascading/nesting of these modules?
That would enable the ability to build complex ADSRs if needed, no?
Cool

fonik · Posted: Fri Mar 22, 2013 12:08 am Post subject:

i almost finished the prototype. i have to iron out some issues with the release stage gate output (does not work as expected, yet).

then i will try a few things. i initially thought of adding a switch for LFO mode, but i will have to try what i can achieve... the gate input is normalled to be high, and the trigger input is normalled to the gate"s input comparator. i will ahve to ponder about this a little bit.

fonik · Posted: Fri Mar 29, 2013 5:09 am Post subject:

so here it is, and everything is working quite nice.
i took the gates from the LEDs to feed comparators, which then output nice high level gates for the outer world.
for the end trigger i initially tapped the release gate and fed it into an inverting comparator (what did i think?), which was not usefull. why?
in trigger mode the LFO does not go into the release stage. so i tapped the output signal.
now one can patch the end out trigger to the trigger input, and then you have a LFO with adjustable rise and fall times.

elmegil · Posted: Fri Mar 29, 2013 6:24 am Post subject:

So are we allowed to post pre-orders yet? Wink

fonik · Posted: Fri Mar 29, 2013 2:44 pm Post subject:

i actually wanted to order a 2nd proto before gaining interest. alas, maybe i will post in the fonik sub-forum soon.

fonik · Posted: Sat May 04, 2013 3:15 pm Post subject:

a new prototype has been finished tonight, incorporating two requested features:
the ADSR/LFO mode switch has been added to the eurorack front panel components PCB (actually just routing the end trigger to the trigger input)
the circuit PCB now offers a third timing cap, so that one could use a on-off-on toggle for the range switch. for the new prototype i used 47uF, 4.7uF, and 470uF. the 47uF is making this ADSR/LFO really slow, and i believe one could use even 100uF...

i will got o bed now, :dizzy:
so no pictures or measurements or whatever. in the next days i will start designing the front panel (will match the 555VCO and the Contr.LFO of course!).