Thing Modulator V3.0

kxspxr · Joined: Nov 20, 2008 Posts: 35 Location: Denmark

I didn't have any succes with getting this thing to work with a RC filter on the power supply as suggested her: http://www.geocities.com/tpe123/folkurban/fuzz/snippets.html

I tried building it without the filter which gave me a loud tone from the VCO at all times. However, if a 1K resistor and a led is connected from +9V to GND before the chip's power pin, it is totally quiet until it's fed with an input. I also added a switch to select a range for the VCO and pot to attenuate the output. This is an easy build if you want a very decent ring modulator-like effect. Could probably use a buffer on the input.

EDIT: it is ALMOST quiet when it is not fed with an input.

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aerogramma · Posted: Fri Dec 12, 2008 12:15 am Post subject:

sounds interesting thanks!

so if i read it correctly thi thing modulator has only one audio input correct?

any chance to have a sound sample?

cheers

Wink

kxspxr · Joined: Nov 20, 2008 Posts: 35 Location: Denmark

Yes - one input and one output. I can't upload any sound samples because I gave my Thing Modulator V3.0 to a friend the other day. I will build one for myself next week (if time is on my side) and upload some sound samples.

EDIT: Sine the bandwidth of the oscillator lock is determined by input voltage and input capacitans, I'd suggest experimenting with the 100nF input cap. Check out the datasheet for LM567 for the equation.
EDIT_2: I tried it with only a few audio sources; piano, violin and fuzz guitar sound absolutely great IMO. Maybe because of the rich harmonic content in all three?
EDIT_3 (and pretty off topic):I can see from your myspace you know Goodiepal as well. He's one of my old friends, small world Smile

aerogramma · Posted: Sat Dec 13, 2008 5:07 am Post subject:

thanks!

look forward to hear them when they're ready

Wink

loss1234 · Posted: Sun Jan 04, 2009 12:28 pm Post subject:

IMPORTANT

THIS PROJECT DOES NOT WORK QUITE RIGHT WITH A REGULAR LM567

(this is why specifically asks for an LMC567....big difference

when i tried it with a lm567 it had a lot more bleed. with an lmc567 it had very little.

kxspxr · Joined: Nov 20, 2008 Posts: 35 Location: Denmark

LektroiD · Posted: Mon Jan 19, 2009 12:58 pm Post subject:

aerogramma · Posted: Tue Jan 20, 2009 4:20 am Post subject: off topic!

EDIT_3 (and pretty off topic):I can see from your myspace you know Goodiepal as well. He's one of my old friends, small world Smile

[/quote]

oh yes i know the palla quite well, i even know his grandma..
we did quite a few stuff togheter and he lunched at my table for years... supernice guy

ninja86 · Joined: Jan 30, 2009 Posts: 1 Location: Underground Lair

LektroiD - check Farnell for the LM567CN http://uk.farnell.com/jsp/displayProduct.jsp?sku=9488367&action=view&CMP=e-b1ef

LektroiD · Posted: Fri Jan 30, 2009 12:48 pm Post subject:

fluxmonkey · Joined: Jun 24, 2005 Posts: 708 Location: cleve

yes... LMC567 ≠ LM567CN

try http://uk.farnell.com/national-semiconductor/lmc567cn-nopb/tone-decoder/dp/1559315

b

LektroiD · Posted: Fri Jan 30, 2009 5:11 pm Post subject:

DGTom · Posted: Sat Sep 05, 2009 3:51 am Post subject:

I need to pick up some LMC567s... I found the normal kind still pretty usefull, I made a pair of drone oscillators for my lunetta which do some cool 'stepping' tones when used in a feedback loop with one another & found a pretty good configuration for a nasty digital sounding fuzz. I'm gonna try this one out as well as I've still got a few chips, was it devised with the LM or LMC?

mikebike · Joined: Apr 06, 2010 Posts: 6 Location: MPLS

this thing is awesome! im gonna build the WSG filter and tack it on the end!??!?! maybe an envolope folower? crazy!?!?!!