Multi Pedal of Doom, opinions wanted..

[GermanCdn]

You know, he could just tap the Klone at the 18v out ...

Or run off the auxillary 18V out from the the Fatpants.

[hammerheadmusicman]

You know, he could just tap the Klone at the 18v out ...

Or run off the auxillary 18V out from the the Fatpants.

Yeah, the fatpants puts out about 17v, that's got to be enough for the klon purposes, but what about the nautilus too, do you think that is too much strain on one charge pump?

I'm quite tired, as i did two lunch sets in 40 degree C heat, and two on the beach tonight, i can't quite get my brain in gear!

[juansolo]

Careful having multiple effects in the same enclosure running charge pump. They can hetrodyne. It's been a proper pain in the arse on a couple of my builds.

You know, he could just tap the Klone at the 18v out ...

Using the LT1054 with pin 1 bend out seems like the best call. You could almost run the whole shooting match at 18v with a single 1054.

Oh, you asked for opinions on the Zero Point: it's excellent, and the modulation is perfect with the depth reduced slightly.

Yeah my prob was a Aquapuss and a CE-2 both at 15v. Couldn't tap it as one pump couldn't run both due to current draw. Ended up running the AP at 9v The other one had a Klone and a Fatpants in. I just ran the FP at 9v there (9v straight to the 18v pad bypasses the pump). Could have tapped it, but by that point I was annoyed enough that I couldn't be bothered.

[RobA]

Since the idea is to run this as a board-in-a-box, you could get an appropriate output AC-AC wall wart transformer and then with a bridge rectifier a couple of regulators and a few caps you could setup all the voltage output levels you will need.

[hammerheadmusicman]

do you mean, use an 18v regulated power, ditch the pumps, and drop it down to 9v where necessary?

[RobA]

Basically do this http://www.generalguitargadgets.com/pdf/ggg_ps_rps_sc.pdf for each voltage level you need. But you only need the one transformer and bridge rectifier and that can feed multiple voltage regulators. You'd probably only need one for 9V and one for whatever your high voltage was (18V). And then the individual effects could be chained off of there like the diagram shows.

The main difference though is that you can use an AC-AC wall wart transformer instead of an internal transformer and that will save a ton of space in the box. I'm building a bench power supply based off the same idea and I can put up a pdf of the schematic if you'd like.

I have one of these http://www.mouser.com/ProductDetail/Triad-Magnetics/WAU12-1500/?qs=%2fha2pyFadui7nkAlehm3pXK75oG1ctRT1Ik1vprsTVM%3d. It's 12V AC output. and that'll get you to 18V DC, but that's not quite enough for putting an 18V regulator on. So, you'd probably need a little bit higher voltage output (about 15V AC) to do a regulated 18V out. I was only looking to get 15V or so for my bench supply.

The rectifier I'm using is one of these http://www.mouser.com/ProductDetail/Vishay-Semiconductors/W06G-E4-51/?qs=sGAEpiMZZMtQ8nqTKtFS%2fMRt2%2f0z7BctX3ql6TMT0n0%3d

[hammerheadmusicman]

Thanks Rob, really apreciate your help, a schematic would be awesome, as much as this is a practical tool, it's a learning tool. Nothing like biting off more than you can chew!

[RobA]

OK, here's the schematic, but first I've got to warn you that I've only bread boarded it so far. I hope to etch it and box it this weekend though because my old workstation power supply died. It does work on the breadboard though and the idea is simple enough.

Here's the link http://www.musicunfolding.com/graphics/PS_Bench.pdf

This is going to be more complicated than you'll want. I wanted two outputs with variable voltage levels and that's what the two based on the LM317's are. You could just leave these off entirely. You'd just take the two fixed regulators and set them at the voltage that you need, 9V and 18V say. The regulators should have heatsinks on them and you need to get an AC transformer that gives you the right level to get to whatever your max voltage is that you want. That 18V designation on my diagram is an unloaded level and the regulator needs some headroom too. So, with the power supply I'm using, about 15V is a max.

[RobA]

This project from MFOS gives a bit of detail on what's going on. http://www.musicfromouterspace.com/index.php?MAINTAB=SYNTHDIY&PROJARG=WALLWARTSUPPLY/WALLWARTSUPPLY.php&VPW=1132&VPH=573. It's for a bipolar supply and is aimed at synths, so it's a bit different, but the concepts are the same. The main difference is that since he's going for a bipolar supply from a wall wart, he can only do half wave rectification. So, he needs a lot more capacitance to filter the supply. When I was testing mine, the 1000µF paralleled with the 220µF seemed to be plenty clean for guitar effects.

[hammerheadmusicman]

Looks like i've got a bit of reading to do! Thanks dude!

[RobA]

Looks like i've got a bit of reading to do! Thanks dude!

You're welcome. There's always more to learn, and that's the good part. Part of my wanting to do this was to start working with AC and I figured that it was better to start with 12 to 15 VAC than it would be with 120 or 240.

[hammerheadmusicman]

Less of a jolt when you touch the wrong bit

[hammerheadmusicman]

So i've been messing around with a scale drawing, and seeing how it all fits together.

I definitely ditching the tuner, save space - more effects! Going to have several effects loops along the way, tuner, wah, anything else..

I and toying with putting the 1776 Multiplex in, as i have a board kicking around at home, and it seems to be a really great delay, and versatile too - which is what this project is all about.

So, The list is looking like this so far..

1) Compressor (Afterlife)
2) Fatpants v2 (think i may just have this as an 'always on' preamp, set with trimmers)
3) Shoot the Moon Tremelo (I'm having some 1590A boards fabbed)
4) Nautilus (amazing pedal - I've done an SMD layout in eagle that fits easily in a 125b or maybe 1590b can't remember)
5) Klon Centaur (True Bypass)
6) Zen Drive (I'm having some 1590A boards fabbed)
7) MultiPlex
8 ) Boost - Maybe Thunderpuss

There is room for another one maybe two effects.. I was thinking of perhaps putting a heavier distortion in there for the real rock stuff, like a Riot! maybe, as i have one of the early Riot's and it just sounds amazing with humbuckers!

Anyone got any views on what else could go in there?

[DutchMF]

I'm missing some modulation, any room left for a Porkbarrel? Or, if space is an issue, a Smoothie or Grind's Tourbillon.

Paul

[hammerheadmusicman]

I was thinking about that this morning Paul, I really would like a chorus in there, i don't really tend to use one as much as i should though, at the minute on the gig i'm on, i could only bring my pedal train nano, and i've been using my lovepedal picklevibe instead.

I could be swayed for a smoothie quite easily, as it has a small footprint!