cool reverb apart from switch spdt 'pop' issue

[samhay]

One more bit to tidy up - we have 2 separate Vref networks at the moment, which I would consolidate into one.

[slacker]

Looks good chaps. I think the volume control is probably better off where it was on the original schematic, after IC2d that way it will only control the level of the effect, sticking it on the end will also affect the bypassed volume.

[deadastronaut]

^ good catch.

so pin 14...vol pot (3+2 joined) then 1....100n.....etc..

shall i still keep the 100k across pins 6/7 then?. ( IC3b)

[slacker]

I'd do the volume pot and mixer the same as you have them here, "Out" hardwired to "Verb out".

[Valoosj]

d'astro, what are the tapers of the pots? And could you tell me what the PGROUND is? I saw it near the reverb brick as well in one of the previous schematics but not anymore.
Also, could you use a 78l05? Or does the reverb draw too much current?

[deadastronaut]

@ian. Righto, ill rejig the schemo, then test it out.

@yorick, im using trimmers on bread, but i guess all lin apart from vol.

i have both those grounds to the same ground on breadboard, so no problemo.

also using 78L05..reg.

[BuGG]

What software is that schematic drawn with?

[Valoosj]

Can't wait until you verify the schematic I always thought I'd never again have a reverb on my pedalboard. Now I'm coming back from that statement ...

[claytushaywood]

so is there a pcb layout for the newest version of this?  I found a couple older links for layouts that did not work.  I can not figure out how to search this site!  sorry!  any help would be greatly appreciated

[claytushaywood]

okay, i found the artwork on page 10, is that the most recent art and schematic?

[deadastronaut]

^ no, ...its not finished as yet...still on breadboard....but soon...ish.

@bugg: its circuit wizard ( a mate gave it to me ages ago and i find it really useful for doing quick schemos)  the pcb side of it is rubbish btw, it has an auto route function
which looks great, but it makes more jumpers than sheep...

@yorick:

got crap to do today, but should be able to verify a bit later...

[claytushaywood]

i really dug chromesphere's demo with the board he used.  where is the most recent, verified artwork and layout?

[deadastronaut]

^ read above reply...

[merlinb]

You can also get rid of R11 and R12, as they don't appear to do anything useful.
In fact, the whole schematic is a mess right now, and I suspect at least one of those opamps isn't required. It would help if deadastronaut listed exactly what controls and features he wants from this thing...

[deadastronaut]

sorry for the mess, but its been through a lot of adjusting...you should see my breadbords     anyway..here is what i have working on breadboard at the mo.

i moved the vol to the end, as its just better level wise..compared to straight out of the opamp. (pin 14)

got rid of vb opamp..

here are the  requirements (which are all working as planned so far)

true bypass and optional tails.

vol
level
mix
damp
decay

hi /lo

oscillation on/off

[samhay]

you can lose:
- R13, R17, C16 (slacker's Vb network) and connect their intersection to Vb.
- R20 (output resistor in parallel to vol pot)
- one of the output caps (1u or 100n) from IC2d

you can connect the wet/dry pot to ground rather than Vb. Actually, as Merlin suggested, the resitors/cap after this pot could do with tidying up.

[deadastronaut]

cheers sam...i'll do those adjustments now..

here we are..

[samhay]

If it doesn't work as planned, you may need to put a resistor back where R11 (33k) was (I would use 100k or 1M), to bias up IC2d.
It should be ok, as it is biasing from the reverb pot, but this thing hasn't always behaved as expected.

[merlinb]

What is SW2 for? It appears to be a bypass, but  I thought this was supposed to be a true bypass pedal?

Also, you can't have tails and true bypass, so I'm not sure what your intension is here...

A better way to do the volume control would be to use a pot for R3. That way it doesn't rape your output impedance.

IC2d needs a resistor from the non-inverting input to Vb. Actually it was better before, where the wet/dry pot was returned to Vb. Not sure why you changed that, because now it will make scratchy sounds..

vol
level    What's the difference between vol and level?
mix
damp
decay   Is this the same as feedback?
hi /lo  Is this for bass cut? Or treble cut, or what?
oscillation on/off

Do you care if the pedal is inverting or not?

[deadastronaut]

switch 2 allows tails,

and i have a true bypass breadboard. (which eventually will be a pedal 3pdt

so i do have both. and is working as such.


the tails : tails off so i  can play clean over the reverb dying off .

the true bypass : acts as a non tails (cuts off instantly) mode.


EDIT:
better?..