What passive modules can I make???

[Wild Zebra]

Hello Hello it's been awhile I've definately been reading man it's hard to keep up. Other hobbies have me busy right know, but I have been slllooooowwwwllly but surely working on a modular I started in an old speaker cab and it's almost done. I'm looking for some easy, boring, but useful passive modules. I already made a 4 passive attenuator module and I'm getting ready to make a mutiple (any tips for the multiple) how may is too many, whats not enough??? I thought about a few sets of 4?? Anyway what other modules can I make?? I have space for like two more and I'm trying to decide if I should make another cool module or fill it with some passive stuff that I'm overlooking. Pics soon. The backlog is growing.

[numbernone]

Being a bananaman I cant say I have any use for mults, however I would say look at Scott Stites' mother of all mults. IT IS WAY COOL.

[Pehr]

Well, there are passive multiples and attenuators.
To get buffered multiples I've used this one: http://www.musicfromouterspace.com/analogsynth/ControlVoltageDist/ControlVoltageDist.html However, it't not passive.

You could also 'patch out' some switches.

Or make a cool passive ring modulator: http://www.cgs.synth.net/modules/cgsrr.html
modem: http://www.cgs.synth.net/modules/cgsrmodem.html

[guitarfool]

There's always the simple (but very useful) passive filters from the Moog modular.

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[Wild Zebra]

Sweet keep em coming. Man I have a Passive RM in my Sound Lab and I just ordered from Mouser I should have ordered some transformers to make another argh. I'll definate have to throw one in there.

[GlassX]

JFET Buffers aren't passive, but are just one transistor and one resistor, so you don't need circuit boards.

You can also build passive Min/Max (or Peak/Through) modules with one diode for each input and one resistor, plus a Buffer...

(see http://www.musicfromouterspace.com/analogsynth/mmlogic.html )

[v-un-v]

Hey Zeb! Been a while!!

Howabout a potential divider between -15v and +15v, with a pot in the middle? Some wild sweeps can be achieved here. This, although really simple can yield some wild sounds when feeding oscillators into ringmods.

-Original idea btw, from my old Korg MS-50. Oh I miss her!

[v-un-v]

You folks should be reading this too;

http://electro-music.com/forum/topic-26450.html

[fonik]

[Pehr]

Idea: Doesn't diode bridges make a passive wave rectifier?

[RF]

[fonik]

[Wild Zebra]

Hey thanks everyone, It has been awhile thanks for all the ideas hopefully I'll be done soon and post pics, not much to look at for the amount of time it's been.

[v-un-v]

[zthee]

[RF]

from http://mypeoplepc.com/members/scottnoanh/birthofasynth/index.html

<SNIP>

M.O.M. (Mother Of all Mults)

45 connectors in three columns of 15. Every five connectors in each column are conneted together. The fifth connector of each section is normalled to the section below it.

</SNIP>

That's all I see.....

[guitarfool]

[shebb]

a ring mod can be made with schottky diodes like bat43, I made one from the ken stone site's schematic with radio shack audio transformers, and it took about 5 minutes! it sounded good tho

[doctorvague]

Here's my 'Two Simple Filter'. Parts count: 2. The NSL mp3 uses a NSL-32SR3 and other mp3 is using a VTL5C3. Lacking vactrols you can always use an LED and photocell. You can also put 2 vactrols in series, parallel and of course try different cap values, or use a rotary switch to switch between caps (increases parts count tremendously, though)
Sorta works like a VCA with no cap at all: Parts Count: 1

I only feed the CV input with positive voltages, like an envelope and haven't blown up a vactrol yet.

Cheers
Phil

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[Wild Zebra]

Sweet well I just made a simple multiple with 4 rows of 5 each, hope that does the trick for now and I decided to try and put a delay in there. Just so you all know the danelectro Slapback can be modified for full on feedback and delay times and they will run in 12V. Sweet! So I'm going to build a simple true bypass do the mods and slap it in there soon. Then I have a tiny bit more room maybe a ring mod will fit. Then pics will come. Thanks Y'all!!

[Tim Servo]

Hey Dr. Vague,

NICE! I think you win the prize for Simplest VCF... EVER! Also, they sound pretty good. You might even try putting two or three different units in parallel. Drive them from the same envelope, and due to the slightly different response times (the NSL sounds a little faster and snappier, while the VTL sounds a bit slower and more "vactrol-like"), you would get an interesting sound. I think. Anyway, thanks for sharing that!

Tim (definitely a bit slower) Servo

[doctorvague]

[v-un-v]

Awesome!

I wonder if you could introduce feedback into the circuit via a pot (or even a vactrol???)



Very cool. very cool indeed (not even I have an excuse not to build one!)

[doctorvague]

[v-un-v]