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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
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Posted: Tue Jul 26, 2011 7:21 am Post subject:
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so there must be something wrong (no news, ain't it?). the good news is, that the circuit and the board is proven to be correct, so there will be an error that you can easily correct. you just have to find it
i would triple check all wiring 1st.
then "greenline" the schematic, thus measuring and checking all connections and values, and marking them with a green pen on a printout of the schematic.
(any other color would do, i made good experiences with green, though). _________________
cheers,
matthias
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Big Boss at fonitronik
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tokyomatik
Joined: Jan 20, 2011 Posts: 171 Location: berlin
Audio files: 6
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Posted: Tue Jul 26, 2011 8:02 am Post subject:
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fonik wrote: | so there must be something wrong (no news, ain't it?). the good news is, that the circuit and the board is proven to be correct, so there will be an error that you can easily correct. you just have to find it
i would triple check all wiring 1st.
then "greenline" the schematic, thus measuring and checking all connections and values, and marking them with a green pen on a printout of the schematic.
(any other color would do, i made good experiences with green, though). |
hey thanx for the goods news
i think you must be a really funny guy
is a luck that you don't live in berlin
probably i was coming to you everyday in your pl ace to stress you because something is not working.... |
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tokyomatik
Joined: Jan 20, 2011 Posts: 171 Location: berlin
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Posted: Tue Jul 26, 2011 12:22 pm Post subject:
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ehm
while i was checking with the multimeter the coarse pot
pin 1 and pin2 by mistake i touched the two terminals and i saw some smoke coming from the area of the tl074 on the vco core
so now i don't know if i burned the tl074, or the electrolithic or one of the resistors at the bottom of the ic or the 220r close to the -v....something happened around there......
somebody can lend me a gun that i wanna kill myself? |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Tue Jul 26, 2011 9:49 pm Post subject:
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tokyomatik wrote: | ehm
while i was checking with the multimeter the coarse pot
pin 1 and pin2 by mistake i touched the two terminals and i saw some smoke coming from the area of the tl074 on the vco core
so now i don't know if i burned the tl074, or the electrolithic or one of the resistors at the bottom of the ic or the 220r close to the -v....something happened around there......
somebody can lend me a gun that i wanna kill myself? |
oops.
what i would do:
1st - triple check wiring and "greenline" as mentioned above; without power connected to the board, of course.
2nd - replace the TL074
BTW resistors can take quite a little bit of power. if you burned one, you should see it by the chenged color of the resistor (turned brown). _________________
cheers,
matthias
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Big Boss at fonitronik
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blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24075 Location: The Netherlands, Enschede
Audio files: 277
G2 patch files: 320
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Posted: Wed Jul 27, 2011 9:46 am Post subject:
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fonik wrote: | BTW resistors can take quite a little bit of power. if you burned one, you should see it by the chenged color of the resistor (turned brown). |
Unless all the magic smoke escaped through a tiny little hole on the underside - I've seen that on low valued resistors (like 10 Ohm or lower) - pretty hard to spot that with the eyes only. _________________ Jan
also .. could someone please turn down the thermostat a bit.
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Wed Jul 27, 2011 1:23 pm Post subject:
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Blue Hell wrote: | fonik wrote: | BTW resistors can take quite a little bit of power. if you burned one, you should see it by the chenged color of the resistor (turned brown). |
Unless all the magic smoke escaped through a tiny little hole on the underside - I've seen that on low valued resistors (like 10 Ohm or lower) - pretty hard to spot that with the eyes only. |
thank's for the hint, jan. fortunately i did not fry too many resistors yet _________________
cheers,
matthias
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Big Boss at fonitronik
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sonic
Joined: Dec 02, 2010 Posts: 106 Location: Victoria BC
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Posted: Sat Sep 10, 2011 1:07 pm Post subject:
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Hi Fonik
Do you still have spares? I would love 2 sets if you have them.
Richard |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sat Sep 10, 2011 1:46 pm Post subject:
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i will have to check the open orders vs. what i have left here on monday. i think i have still enough core PCBs, but i am not sure about the waveshapers... hold on. _________________
cheers,
matthias
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Big Boss at fonitronik
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sonic
Joined: Dec 02, 2010 Posts: 106 Location: Victoria BC
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Posted: Sat Sep 10, 2011 1:58 pm Post subject:
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Okay. Thanks mate. Fingers crossed. |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Mon Sep 12, 2011 12:25 am Post subject:
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all good, sonic. check PM soon. _________________
cheers,
matthias
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Big Boss at fonitronik
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oozitron
Joined: Apr 02, 2007 Posts: 38 Location: USA
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Posted: Fri Oct 21, 2011 7:04 am Post subject:
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Finally getting a chance to build this and I'm hesitating on cap C11
In my notes I have written "MYLAR" next to it, and I've backtracked thru the various threads but can't find out where I got this from.
Does C11 have to be Mylar? Or will a good quality Polyester Film work?
(If anyone has a specific Mouser part they've used that would be ideal)
I want it to really sound good, since I've sold one of my Blacet VCOs to fund a batch of these!
THANKS!
Drew |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Fri Oct 21, 2011 9:37 am Post subject:
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C11 is just for the AC coupling of the FM input, so not critical at all IMHO. it is not part of the audio path anyways. _________________
cheers,
matthias
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Big Boss at fonitronik
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a.b.o.z.
Joined: Feb 07, 2007 Posts: 351 Location: Zagreb, Croatia
Audio files: 7
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Posted: Mon Oct 31, 2011 4:18 am Post subject:
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matthias, are there any boards left?
I would like to have one set if possible.
cheers
Ivan |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Mon Oct 31, 2011 6:31 am Post subject:
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i have some core PCBs left. i re-ordered a few waveshaper PCBs to have complete sets again. they should arrive early november... i will let you all know here in this thread. _________________
cheers,
matthias
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Big Boss at fonitronik
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inlifeindeath
Joined: Apr 02, 2010 Posts: 316 Location: Albuquerque, NM
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Posted: Wed Nov 09, 2011 8:13 pm Post subject:
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Wooo hooo! Just got mine put together and it works great first shot! Used the scope to calibrate it, easy enough. Sounds great and is a blast to play with. The hard sync is indeed awesome, thanks all who were involved!
Video as soon as I can find the camera charger. _________________ http://www.youtube.com/user/borisandfef |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Thu Nov 10, 2011 12:49 am Post subject:
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inlifeindeath wrote: | Wooo hooo! Just got mine put together and it works great first shot! Used the scope to calibrate it, easy enough. Sounds great and is a blast to play with. The hard sync is indeed awesome, thanks all who were involved! |
Quote: | Video as soon as I can find the camera charger. |
he is doing a video, he is doing a video... _________________
cheers,
matthias
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Big Boss at fonitronik
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Thu Nov 10, 2011 12:50 am Post subject:
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BTW the waveshapers are in, so i now have a few complete sets again... _________________
cheers,
matthias
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Big Boss at fonitronik
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a.b.o.z.
Joined: Feb 07, 2007 Posts: 351 Location: Zagreb, Croatia
Audio files: 7
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Posted: Thu Nov 10, 2011 1:40 am Post subject:
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ok, loged in finaly.
I would like one set please.
Cheers
Ivan |
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SubG (deactivated)
Joined: Oct 09, 2009 Posts: 70
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Posted: Sat Nov 12, 2011 4:30 pm Post subject:
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have a question regarding the outputs:
ramp out = 'skew' output
pulse out = output affected by PW and PWM
is this right?
thanks |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sat Nov 12, 2011 4:43 pm Post subject:
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SubG wrote: | have a question regarding the outputs:
ramp out = 'skew' output
pulse out = output affected by PW and PWM
is this right?
thanks |
yes.
J6 is the "rampoid" out, which is influenced by the "skew" control pot (R53). i think this is what you mean?
my explanation: "ramp" is another word for "saw", and the "rampoid" is a mixture of "triangle" and "saw".
J10 is the pulse out, affected by PW and PWB _________________
cheers,
matthias
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Big Boss at fonitronik
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SubG (deactivated)
Joined: Oct 09, 2009 Posts: 70
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Posted: Sun Nov 13, 2011 2:02 am Post subject:
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Thanks! |
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reve
Joined: Feb 23, 2008 Posts: 149 Location: USA
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Posted: Mon Nov 14, 2011 6:43 pm Post subject:
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So after a lot of dilly-dallying, I finally got around to building my boards and shapers (polyphony will finally be mine!). I'm still waiting for pots, so in the meantime I figured I'd start drilling panels.
Thing is, I want to have the option of using the shapers with external VCOs as well. I figured I'd just run the triangle out from the core to a normalized jack and then run it back to the shaper? Is there anything with... wire length or shielding anything that I need to worry about or would that be cool?
Seems like a stupid question, but... I'd rather ask it before drilling panels just to be sure. _________________ - r. mosquito
SynthDIY Synthpop -> http://www.reverbnation.com/photovoltaik |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Tue Nov 15, 2011 12:35 am Post subject:
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reve wrote: | Thing is, I want to have the option of using the shapers with external VCOs as well. I figured I'd just run the triangle out from the core to a normalized jack and then run it back to the shaper? Is there anything with... wire length or shielding anything that I need to worry about or would that be cool? |
since you use this normalized jack as an input, there is nothing more to think about. you wanted to use the triangle ouput on the J_WS header on the core board for this, i believe. _________________
cheers,
matthias
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Big Boss at fonitronik
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The Bad Producer
Joined: Mar 08, 2009 Posts: 282 Location: The Manhole
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Posted: Tue Nov 15, 2011 5:19 am Post subject:
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fonik wrote: | BTW the waveshapers are in, so i now have a few complete sets again... |
Hi Matthias, have you got two sets perchance? Seems I missed this! _________________ http://loudestwarning.tumblr.com/ |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
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Posted: Tue Nov 15, 2011 5:49 am Post subject:
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yes. _________________
cheers,
matthias
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Big Boss at fonitronik
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