Print Page - Thing Modulator

Title: Thing Modulator
Post by: { antonio } on February 24, 2004, 11:11:56 PM

I wanted to know if anyone has built the thing modulator. I have had some trouble with. I have let it sit for months unfinished. its about time for me to get it done. but as i looked at it again tonight i dont see what i have dont wrong.

i just wanted to see if anyone has finshed it and maybe they could give me some hints.

http://www.geocities.com/tpe123/folkurban/fuzz/thing.gif

thanks.

Title: Thing Modulator
Post by: brett on February 24, 2004, 11:44:10 PM

Hi. Sorry, but can't really help with the Thing Modulator. But I can say that the Ring Frobnicator and most other modulators are less than ideal for guitar work (with the possible exception of the 1496-based designs). With that in mind, I've been working on a simple modulator. I've designed and tested the circuit, and have designed a PCB for the final version. Sometime over the next few days I'll build it on the PCB to test the layout. If all goes well, in a week or two I'll have the design on my web-page and a notice in this forum. I'm thinking of calling it the "Modulatron".

Sorry that doesn't answer your question.

cheers

Title: Thing Modulator
Post by: Tim Escobedo on February 25, 2004, 12:02:01 AM

What's the problem?

Title: Thing Modulator
Post by: mattv on February 25, 2004, 10:31:01 AM

It works great for me. Double check your wiring and connections. Make sure your using the specified LMC567 chip and not the regular LM567.

Title: thing modulator
Post by: { antonio } on February 25, 2004, 12:30:14 PM

tim, could that be the proplem?

i am using an lm instead of the lmc.

i didnt know that would be a big deal. but thanks for the help. i will get myself a new chip today and see if that works.

thanks.

Title: Thing Modulator
Post by: Tim Escobedo on February 25, 2004, 01:24:44 PM

Yes, the LMC567 is absolutely necessary if you want the circuit to behave. That includes a reasonable amount of carrier rejection.

The more common LM567 may not even work with the 100k resistor in series with the power pin, as it's much more of a power hog than the LMC567.

Keep in mind that this is no Blue Ringer. The internal oscillator is fairly limited in range and tone. There's no wet/dry mixing. Carrier rejection is fairly decent considering the simplicity. But any high gain effect after the device will audibly amplify the carrier to possibly annoying levels.

Title: thanks.
Post by: { antonio } on February 25, 2004, 01:29:14 PM

thanks so much for your help. i am on my way to get the new chip.

thanks again.

Title: Thing Modulator
Post by: mattv on February 25, 2004, 04:48:37 PM

Quote from: Tim Escobedo
...The more common LM567 may not even work with the 100k resistor in series with the power pin...

It doesn't.

Title: Thing Modulator
Post by: mattv on February 26, 2004, 04:47:22 PM

Anyway, if you can't find a LMC567, just use the LM and remove the RC network from V+. It's noisier this way, but IMO also does weirder things.

Title: Thing Modulator
Post by: nightingale on February 26, 2004, 05:40:52 PM

very cool~
thanks mattv!

DIYstompboxes.com

DIY Stompboxes => Building your own stompbox => Topic started by: { antonio } on February 24, 2004, 11:11:56 PM