cool reverb apart from switch spdt 'pop' issue

[deadastronaut]

^ no idea..


so how do we incorporate both schemo's..

[samhay]

^so how do we incorporate both schemo's

In the simplest sense, you plug the brick's input into Send and its output into Return.

[deadastronaut]

cool, i'll rig up the little schemo on a seperate breadboard and give it a whirl..

[slacker]

To test it does what you want chuck the whole of your schemo minus the electronic switching in the send/return loop. If it does the job we can refine it.

[deadastronaut]

^ yep thats what i was going to try, just to test.  cheers guys.

wish me luck...

[deadastronaut]

edit: ...my brick came loose..

YAY!!!...IT WORKS!!!..WHOOOOHOOOOO.....

https://dl.dropboxusercontent.com/u/7464107/DOOBYDOO.mp3

^22K.

[samhay]

Nicely celebrated.
Have you thought about how you are going to tidy it up now?

[deadastronaut]

nope...

but i'll be glad to get this bugger in a pcb layout and  off my breadboard/s at long last..

[slacker]

Yaaahhhhhhhhhh  sounds great.

I think the main thing to sort out is do you still want the option of tails or true bypass or are you happy with tails/no tails buffered bypass, same as the Echo Base. The looper schematic can easily be tweaked to offer no tails with a toggle to select whether it kills the send or the return. If you want the true bypass option then we'll need to replace the switch with fets or something.
The other thing is are you bothered that it inverts your dry signal?
If you're not, then if you ditch the opamp that's generating vb we can use that as the output mixer and use your existing input buffer in place of the one on the looper. If you want the dry output in phase with the input then we need to add another opamp or possibly we could make the output mixer non-inverting.

[Valoosj]

Great

And does this have any possible negative consequences?

The other thing is are you bothered that it inverts your dry signal?

[deadastronaut]

Yaaahhhhhhhhhh  sounds great.

I think the main thing to sort out is do you still want the option of tails or true bypass or are you happy with tails/no tails buffered bypass, same as the Echo Base. The looper schematic can easily be tweaked to offer no tails with a toggle to select whether it kills the send or the return. If you want the true bypass option then we'll need to replace the switch with fets or something.   tails and true bypass would be cool
The other thing is are you bothered that it inverts your dry signal? hmmmm...i guess
If you're not, then if you ditch the opamp that's generating vb we can use that as the output mixer and use your existing input buffer in place of the one on the looper. If you want the dry output in phase with the input then we need to add another opamp or possibly we could make the output mixer non-inverting.  sounds good to me

nice one ian.

[deadastronaut]

Great

And does this have any possible negative consequences?

recording maybe?.. (phase inverting) cancelling....just thinking aloud.


if we can get this loopy bit  drawn up, i'll test it out..

[haveyouseenhim]

nope...

but i'll be glad to get this bugger in a pcb layout and  off my breadboard/s at long last..

Can't wait!   All of this stuff lately has been WAY over my head. I'm ready to built it again  (this time a working one )

[deadastronaut]

just to keep things in context,

here is what is on the breadboard at the mo..

[samhay]

something like this?

Note that cap after R12. Not sure where you want to put the volume pot (if at all).

[deadastronaut]

cheers sam. nice one,   what value cap after R12?.

i definately want a volume so i can adjust it when fully wet etc..

vol probably best on overall out after C17, and lose the R20?.. . ..its got plenty of vol as it is when compared to breaboard 3pdt TB

[mmlee]

Good job,been following this closely. Am I right in thinking we're basically just taking the original schematic and plonking the ins and outs into the switching scheme?I'm on my phone so can't compare easily with the original schematic I used.

If this is the case,i might just do an optional daughter board tails vero in conjunction with the one I drew up before (which is still unverified)

[samhay]

cheers sam. nice one,   what value cap after R12?.

i definately want a volume so i can adjust it when fully wet etc..

vol probably best on overall out after C17, and lose the R20?.. . ..its got plenty of vol as it is when compared to breaboard 3pdt TB

Don't know about the value of the new cap - how big is your wet/dry pot? Either way, I would start with 1u and then tweak to taste.

As it stands, slacker's loop circuit is unity gain for both the loop and bypass. If you want a volume control on the end of it, then I would replace R18 (in his schem) with a 100k pot.

[deadastronaut]

cheers sam. nice one,   what value cap after R12?.

i definately want a volume so i can adjust it when fully wet etc..

vol probably best on overall out after C17, and lose the R20?.. . ..its got plenty of vol as it is when compared to breaboard 3pdt TB

Don't know about the value of the new cap - how big is your wet/dry pot? Either way, I would start with 1u and then tweak to taste.

As it stands, slacker's loop circuit is unity gain for both the loop and bypass. If you want a volume control on the end of it, then I would replace R18 (in his schem) with a 100k pot.

wet/dry is 10k.. i'll experiment with that cap then.

100k pot  on pins 6/7  it is then......like this.?

i'm guessing we can do away with IC1a Vb now too then..?..if so we can just use a quad.



@mmlee: i guess so..

[samhay]

^wet/dry is 10k.. i'll experiment with that cap then.
1u would be a good start, but you may want a bit more if you a playing a bass through it.


^100k pot  on pins 6/7  it is then......like this.?
Nope - lift the ground connection and swap the pot lugs - e.g. 1&2 to the inverting input and out, respectively. If that doesn't make sense, then a conventional volume pot on the output will work fine too.

^i'm guessing we can do away with IC1a Vb now too then..?..if so we can just use a quad.
Yes, sorry I mean to mention this earlier.