I really dont get how a feedback loop works.  Its such a simple circuit, and can make thing oscillate beyond belife.  Anyone know how it works?  Here is a schematic of one:

I have been curious to fool around with this type of circuit, but something seems a little screwy in that diagram. I don't know much, but what I know doesn't  jibe with that schematic. Is that all there is? Then let's keep dancing...

Kerry M

the schematic works, cause I tested it out, and you can make some really wierd sounds.  I just dont understand how it works.

Quote from: O'malley's AlleyI really dont get how a feedback loop works.  Its such a simple circuit, and can make thing oscillate beyond belife.  Anyone know how it works?  Here is a schematic of one:

it loops the output to the input. of the effect in the loop.  there fore making it a continous feedback,  feedback happens when you catch the audio signal from the output of a speaker or a audio signal, and it gets reamplified again and again and again.  basically making the gain so high it is unstable to wich it oscilates.

I don't get how you use it.  So you connect an effect in the loop, and it'll basically make feedback?  I can imagine what it'd sound like with distortion but what would happen if you stuck a flanger or somethin' in the loop?

...and what's the deal with that input jack?  Is the orange wire going to the tip, green to the ring and black to the sleeve?  :shock:

geocities.com/midfielectronics/tsa
heres a better scheme...
doug

You don't get feedback with this "effect", but get noise. I tried with my Obsidian and got some cool noises, and the theremin-like sond when you turn the guitar knobs. With a flanger, I think you will get some "spacial" and "ovnis" sounds.

You can create feedback loops which function almost identically with a stereo pedal and by connecting 1 input to 1 output and then putting whatever you want into it and whatever out of it.  The resistor in the schematic is basically making sure that the audio level is correct for the correct feedback (more like oscillation) to occur.

-Colin

Quote from: doug deepergeocities.com/midfielectronics/tsa
heres a better scheme...
doug

thanks dude, that is a much better schem.  I hate schems drawn like the one I posted above.

by the way, on that schematic, how can I add true bypass to it?

Open the switch will bypass the feedback by eliminating the feedback. I might make a momentary feedbacker Crazy distortion feedback madness!

So, how do you hook this thing up? I've looked at both schematics and I still don't get how you would hook this thing up. Can you just connect the send and return together and switch the pot in or out of the circuit?

Quote from: Paul MarossySo, how do you hook this thing up? I've looked at both schematics and I still don't get how you would hook this thing up. Can you just connect the send and return together and switch the pot in or out of the circuit?

you got mail. i sent you the schematic with truebypassing as well as an active and bypass led indicator.

you can post it if you want too.

Quote from: Ansil

Quote from: Paul MarossySo, how do you hook this thing up? I've looked at both schematics and I still don't get how you would hook this thing up. Can you just connect the send and return together and switch the pot in or out of the circuit?

you got mail. i sent you the schematic with truebypassing as well as an active and bypass led indicator.

you can post it if you want too.

Can you send one to me also?  My email is mancubus22@hotmail.com.  It would be great if you could.  Thanks!

Tyler

Thanks Ansil.
I still don't understand how the signal is routed through this thing, though.
I must be really dense today.  :oops:

Quote from: smoguzbenjaminOpen the switch will bypass the feedback by eliminating the feedback. I might make a momentary feedbacker  Crazy distortion feedback madness!

DUDE!! great idea! i'm going to steel it is that ok?

Quote from: Ansil

Quote from: Paul MarossySo, how do you hook this thing up? I've looked at both schematics and I still don't get how you would hook this thing up. Can you just connect the send and return together and switch the pot in or out of the circuit?

You put your effects between the send and the return, just like you were hooking up an effects loop.  Then some pedals just go mad.

"You put your effects between the send and the return, just like you were hooking up an effects loop. Then some pedals just go mad."

I figured that must be how it works, but looking at the second schematic posted, it looks like it wouldn't work - there is a switch between the input/send and the pot. When the switch is off, then all signals through the box die since there is no connection between the out/return. I don't see how it's supposed to work. There must be more going on with the switching than what is shown there...

If you trace the signal... plug your guitar into the "input" and plug your effects input into the "send" jack. Those are connected internally. Now connect the effect's output to the "return" jack, just like an effects loop would be. Inside the box the return jack is then always connected to the "output" jack. The out of course goes to the amp thingy. If you forget about the switch and pot, it's just two pairs of jacks with direct internal connections between jacks in each pair.

Now if you connect the switch, you're adding a path from the effect return to the effect send, thus the feedback. The switch only affects that feedback path.

I hope that helps,
-Peter

hey paul did you look at your email that i sent you with the schematic for mine in it.