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Projects => Build Reports => Topic started by: jimmybjj on April 27, 2011, 11:34:01 PM

Title: Rat with feedback loop and blinking color changing eyes!
Post by: jimmybjj on April 27, 2011, 11:34:01 PM
Sorry no gut shots. I forgot before my friend got a hold of it and now it belongs to him. The rats eyes blink different colors and at different rates. The eyes only light up when the feedback loop is engaged. Normally these type of leds induce a strange sound into the signal but in a feedback loop you want strange  ;D and when the loop is off the leds are not drawing power to induce noise so it all works out. The switch is for the ruetz mod. Dual outputs per the request on my friend.
(https://lh4.googleusercontent.com/_yFex0loOVcw/TbilvWvO6vI/AAAAAAAABGY/IM3TrgOXSoA/s400/DSC02642.JPG)
(https://lh4.googleusercontent.com/_yFex0loOVcw/Tbilvc92B-I/AAAAAAAABGM/O6kMvZHI0ms/s400/DSC02639.JPG)

(https://lh5.googleusercontent.com/_yFex0loOVcw/TbilvvtiC0I/AAAAAAAABGQ/S3lkGwJ6pss/s400/DSC02638.JPG)
(https://lh5.googleusercontent.com/_yFex0loOVcw/TbilvcCPzNI/AAAAAAAABGc/mI3ngjnCcBA/s400/DSC02640.JPG)

(https://lh4.googleusercontent.com/_yFex0loOVcw/TbilvmtlvOI/AAAAAAAABGU/Wc6qYbh3xEY/s400/DSC02643.JPG)
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: CRBMoA on April 27, 2011, 11:40:34 PM
Excellent! I wish you would have posted this yesterday!

I just finished a GORGEOUS Lunar Fuzz (pics in a day or so).

And installed the nifty LED, which works with the DOSTM motif.

But that noise, ever so faint, when the guitar was muted. AAARRRGGGGGHHHHHHH!!!!!
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: madbean on April 28, 2011, 12:01:21 AM
That, my friend, is shit-hot pedal building!
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: bigmufffuzzwizz on April 28, 2011, 01:15:28 AM
Quote from: madbean on April 28, 2011, 12:01:21 AM
That, my friend, is shit-hot pedal building!

Yes. Sooo clean on the decals, wish we could see the inside! The LEDs are a great idea and so is the stereo output!
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: mjcyates on April 28, 2011, 01:32:28 AM
That is one cool pedal!
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: jtn191 on April 28, 2011, 03:10:18 AM
could you explain the leds in a bit more detail?

your friend is lucky, I want one!
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: maysink on April 28, 2011, 05:04:27 AM
Quote from: madbean on April 28, 2011, 12:01:21 AM
That, my friend, is shit-hot pedal building!

yep
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: juansolo on April 28, 2011, 09:48:06 AM
Impressive, most impressive.
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: jimmybjj on April 28, 2011, 10:31:00 AM
Quote from: madbean on April 28, 2011, 12:01:21 AM
That, my friend, is shit-hot pedal building!

Thanks for all of the great compliments guys, and a high compliment from the man himself  :D

Quote from: jtn191 on April 28, 2011, 03:10:18 AM
could you explain the leds in a bit more detail?

your friend is lucky, I want one!

There isn't anything to explain really. They are color changing leds, controlled via PWM (or at least i think.) They hook up like any other LED, doesn't take anything special to get them going. I DO NOT RECOMMEND them, they do introduce a whine in your signal and unless your looking for weird (feedback loop) then it is very undesirable.
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: k.rock! on April 28, 2011, 05:46:22 PM
Quote from: jimmybjj on April 28, 2011, 10:31:00 AM
Quote from: madbean on April 28, 2011, 12:01:21 AM
That, my friend, is shit-hot pedal building!

Thanks for all of the great compliments guys, and a high compliment from the man himself  :D

Quote from: jtn191 on April 28, 2011, 03:10:18 AM
could you explain the leds in a bit more detail?

your friend is lucky, I want one!

There isn't anything to explain really. They are color changing leds, controlled via PWM (or at least i think.) They hook up like any other LED, doesn't take anything special to get them going. I DO NOT RECOMMEND them, they do introduce a whine in your signal and unless your looking for weird (feedback loop) then it is very undesirable.

Actually you can correct this issue by connecting a polarized cap in reverse to the LED so that it filters the noise...I have done this successfully by using a 33uF I believe...just use your ear and try different caps and crank it up...if you still hear the buzzing noise increase the value...but in my case a 33uF was enough...


-Kaleb
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: k.rock! on April 28, 2011, 05:47:00 PM
Oh, and the pedal looks AWESOME by the way haha  :D forgot to comment on it...Great job man, very original!

-Kaleb
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: jimmybjj on April 28, 2011, 05:53:59 PM
Quote from: k.rock! on April 28, 2011, 05:46:22 PM
Quote from: jimmybjj on April 28, 2011, 10:31:00 AM
Quote from: madbean on April 28, 2011, 12:01:21 AM
That, my friend, is shit-hot pedal building!

Thanks for all of the great compliments guys, and a high compliment from the man himself  :D

Quote from: jtn191 on April 28, 2011, 03:10:18 AM
could you explain the leds in a bit more detail?

your friend is lucky, I want one!

There isn't anything to explain really. They are color changing leds, controlled via PWM (or at least i think.) They hook up like any other LED, doesn't take anything special to get them going. I DO NOT RECOMMEND them, they do introduce a whine in your signal and unless your looking for weird (feedback loop) then it is very undesirable.

Actually you can correct this issue by connecting a polarized cap in reverse to the LED so that it filters the noise...I have done this successfully by using a 33uF I believe...just use your ear and try different caps and crank it up...if you still hear the buzzing noise increase the value...but in my case a 33uF was enough...


-Kaleb

thanks for the advise. I have tried this before with some success but never really resolved the issue. I tried it in a phase 90 build and went all the way up to 220uf. the noise became softer but was still present. the issues was not important enough for me to purse further. i just used a normal led.
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: Roctopus on April 29, 2011, 04:33:17 PM
Inspiring build! A+
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: StompIt on April 29, 2011, 04:40:03 PM
Please give us some GUT SHOTS!

BTW:  Beautiful Work!
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: jtn191 on May 24, 2011, 01:17:16 AM
sorry to revive an older thread...but I want to build one like this. How would one wire a feedback loop switch?
Title: Re: Rat with feedback loop and blinking color changing eyes!
Post by: jimmybjj on May 25, 2011, 01:31:03 PM
Quote from: jtn191 on May 24, 2011, 01:17:16 AM
sorry to revive an older thread...but I want to build one like this. How would one wire a feedback loop switch?

To make the feedback loop you would simply wire everything as you normally would then you would wire an additional wire from the input jack to the output jack. This would create a permanent feedback loop that would make the pedal unusable. You need to do two things to make your pedal like mine. First, put a switch in the middle of the feedback loop wire that will break the connection turning the loop on and on. Second, on either side you will to put a pot wired as a variable resistor so that you can dial in the amount of "feedback."

Sorry for the convoluted answer, let me know if you have any more questions.