Simple Digital Delay

[Leetut]

Ice-9, you're in Newcastle!!  I live in Birtley

I'm struggling to find a supplier of the FV-1 chips.  Cant find them from the recommended distributors.

I’m in Sunderland!

[nickbungus]

The North East Solder Sniffers!!

[nickbungus]

Going to repost this so its not lost on the bottom of the page

I'm just finishing off the schematic and then I'm going to tidy it up.  I've got 2 isolated outputs for the 3 amp setup that route the signal back to the main output if a Jack isnt present to avoid ground hum.  Not sure if I need to add opamps to mix the signal back into the main output if there isnt a connection? 

Also, I think I'll add 3 external level pots.  Should help get the mixing if required.  (Also I've put the opamp as a LM324 but thats to be decided - I just put a quad on just in case I needed some to mix signals).

Also I've made a mistake with the switched Jacks and connected the switched signal to ground - sorry/

 

[Digital Larry]

I think Frank (one of the FV-1 designers) talks about using an anti-aliasing low pass filter between 2 chips if daisy chaining them, or in the feedback loop if it is external to the chip.  Something about preventing aliasing of out of band signals due to delta-sigma or sigma-delta or pi beta theta epsilon or one of those other fraternities.  I've never daisy chained my FV-1s so I'm not sure about it, but it would be good to know that this is not a problem before committing to build such a complicated beast.

Might be worth inquiring over at the Spin forum.

[Ice-9]

I think Frank (one of the FV-1 designers) talks about using an anti-aliasing low pass filter between 2 chips if daisy chaining them, or in the feedback loop if it is external to the chip.  Something about preventing aliasing of out of band signals due to delta-sigma or sigma-delta or pi beta theta epsilon or one of those other fraternities.  I've never daisy chained my FV-1s so I'm not sure about it, but it would be good to know that this is not a problem before committing to build such a complicated beast.

Might be worth inquiring over at the Spin forum.

Larry, The schematic snippet I drew has the anti aliasing filtering in the schematic as per datasheet so should work fine.

[nickbungus]

Cheers guys. 

[Ice-9]

Ice-9, you're in Newcastle!!  I live in Birtley

I'm struggling to find a supplier of the FV-1 chips.  Cant find them from the recommended distributors.

I’m in Sunderland!

What' s the odds eh! three of us all just round the corner from each other.