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Author Topic: the downgrade  (Read 34288 times)
para
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« on: December 04, 2006, 01:14:25 PM »

hey everyone. i just finished up the first 5 of these.

http://thesquarewaveparade.com/downgrade.html

its based around Tom Bug's bugcrusher circuit

http://www.bugbrand.co.uk/pages/soundde ... bugcrusher

i then bent it a bit and have it running on batteries, etc ... i just got a bunch of samples posted - have a listen







steven
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undothis
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« Reply #1 on: December 05, 2006, 12:47:51 PM »

Great job looks delicious!!!! Love the starve function. O
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Auchenorrhyncha
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« Reply #2 on: December 05, 2006, 04:39:57 PM »

that looks really good, like really good

I like that you were able to get the knobs all the way down to the panel surface, the empress trem has knobs like that, but they sort of float on the nut, and it looks bad to me.


beutiful grafics.
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para
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« Reply #3 on: December 05, 2006, 04:45:11 PM »

well they aren't all the way down, but really close. maybe half of the height of the nut off the top. i think the angle of the shot kind of hides that a little bit. why don't they make all knobs recess to cover them completely?


and thanks guys




steven
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caress
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« Reply #4 on: December 06, 2006, 02:18:00 PM »

this looks really amazing!  can you post a schematic?
i am really interested in making myself one.
would you email if you don't want to post...btroniq@yahoo.com
thanks
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para
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« Reply #5 on: December 06, 2006, 04:30:22 PM »

i had posted a simplified version of the bugcrusher here. this is what it based one.



http://experimentalistsanonymous.com/bo ... .php?t=794
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cloudscapes
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« Reply #6 on: December 06, 2006, 04:34:10 PM »

That looks really awesome. I dig the case!

I looked at the circuit and I'm going to give a go at building one. It looked relitavelly easy (and requires two 9v batteries, hmm).
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para
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« Reply #7 on: December 06, 2006, 04:46:19 PM »

right the original bugcrusher was actually designed to be used in a modular synth. http://www.bugbrand.co.uk/pages/soundde ... bugcrusher

also the ad781 requires a bipolar supply

colin has a reducer that runs on a single 9v

http://experimentalistsanonymous.com/di ... rusher.gif
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cloudscapes
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« Reply #8 on: December 06, 2006, 05:34:55 PM »

thanks for the addisional schematic!

looks like I need to learn how to read them better. I have no idea which pins or ICs those are, and what Vb stands for.

*homework*
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para
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« Reply #9 on: December 06, 2006, 06:23:15 PM »

that scheme is from the guy that runs this board. its not mine.


heres a bunch more in his archive

http://experimentalistsanonymous.com/diy/


Vb is ground  and he drew the scheme like that so you could use any ic you happen to have. if you look on the data sheet for a TL084 for example http://pdf1.alldatasheet.com/datasheet- ... TL084.html   there you will see how the pins are laid out for that chip and then you can associate them yourself. its very simple really.


http://www.alldatasheet.com/   just what it says


steven
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caress
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« Reply #10 on: December 07, 2006, 04:12:45 PM »

i was hoping for a little more info on your mods.  i get the starve function, but maybe you could help a bit with the others?
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para
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« Reply #11 on: December 07, 2006, 05:19:39 PM »

oh, well the starve is actually on the negative battery not the positive ( it didn't really do much there).  and the "dialup" is just a feedback loop ( connecting the in and out with a pot between, many sizes worked but i wanted more control so i went small and used a 20k and added the switch otherwise half gain would already start feeding back. the high / low is a switch between two different cap values at ( c1 - i think? the 4n7 and a 100nf maybe?)  the "dirty" is a set of clipping leds in my preamp and the pre amp is just a preamp i made based on one of anderton's micpre's, but simplified. added before the "in" of the reducer. i probably should have had the reducer section between the initial gain and the output buffer but i didn't like the sound of it. i might get made fun of for that, and it is a little bit noisy because of that, but so what. its called the downgrade, its not meant to be super clean.


does that help?

steven
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caress
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« Reply #12 on: December 07, 2006, 05:28:16 PM »

yeah thanks so much.  all of this makes a lot of sense!
i'm away from home right now but when i get back i'm going to make one of these maybe a little modified, though.  really great ideas here...
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para
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« Reply #13 on: December 07, 2006, 05:32:34 PM »

let us know what you come up with





-
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para
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« Reply #14 on: December 07, 2006, 07:56:43 PM »

hey caress, just caught your fuzz/vibrato on HN how about you share?

i see 18 knobs and at least 16 switches but i don’t think i could make them all out.


your white vss and rainbow patchbay are fantastic too
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