Author Topic: Dub stuff  (Read 15050 times)

Kipper4

Re: Dub stuff
« Reply #40 on: October 19, 2017, 09:53:32 AM »
Thanks guys.
I just thought they were a defunkt chip.
Lord knows how my brain works.

I've got some 4046s on order.
Never heard of the 7555 r LM567

Isnt there a way to get a pwm from the 555 chip i read somewhere?

All good stuff.
Of course this is just the start of my journey.
It might take me more than "two weeks" and it will be as annoying as heck.

I have noted that the the 555 chips range of freqauncy changes by very little with a cv
9v~0v swing.

I'm expecting better from the 4046. I saw a you tube video that demoed this.

Thanks for filling me in. I go be annoying.
"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

duck_arse

Re: Dub stuff
« Reply #41 on: October 19, 2017, 09:59:43 AM »
Rich - you'll larf arf arf arf arf ..... but I bought some "NEC D5556C" ic's as dual cmos 555's some years ago, and have never ever ever ver rrr used them, nor have I ever found a datasheet for same aim aim aim.

also, havva look at those cro shots I posted in that thread of moid's showing the action of the cv input.
http://www.diystompboxes.com/smfforum/index.php?topic=118079.msg1099354#msg1099354
".... just enough bling hardware to complement the quiet textured slip-proof pants ...." - customer appraisal of last pedal build.

bluebunny

Re: Dub stuff
« Reply #42 on: October 19, 2017, 12:25:48 PM »
I just thought they were a defunkt chip.

Perhaps you were thinking of the 566 - a VCO/function generator.
  • SUPPORTER
Ohm's Law - much like Coles Law, but with less cabbage...

anotherjim

Re: Dub stuff
« Reply #43 on: October 19, 2017, 01:39:25 PM »
Quote
Never heard of the 7555 r LM567
I think 7555 is a CMOS version.
567 is the "tone decoder" chip. A pll simplified just to find if a particular input frequency is present.
565 is obsolete. A proper pll similar in use to a 4046 with same BJT tech as the 567.

Did I mention adding a microphone? Let it work of its own feedback. Either envelope detected CV or freq modulating the VCO CV.
A mic on the panel is all the rage in modular synth noize modules.

Croeso i Diystompboxes.

If they didn't hear you then you didn't say it.

Kipper4

Re: Dub stuff
« Reply #44 on: October 19, 2017, 02:05:05 PM »
I think not Marc.
No more chip buying.
I'm gonna need a shed load of switches.
"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

Kipper4

Re: Dub stuff
« Reply #45 on: October 19, 2017, 02:21:55 PM »
Does C mos make sense in this application?

Thanks for the reference Stephen. Nice work.

I have xlr sockets in stock. Jim.
"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

duck_arse

Re: Dub stuff
« Reply #46 on: October 20, 2017, 09:26:15 AM »
kipper - before you all the mods, maybe ask yourself - what would the Mad Professor have on his dub siren?

cmos is always called for. ICM7555 was the original part number of the original cmos 555 made by Intersil (as far as I know). these days the prefix varies, I have GLC555, S[ignetics?] 7555CN both cmos vershuns.

I have an idea the 567 has also gorn cmos.
".... just enough bling hardware to complement the quiet textured slip-proof pants ...." - customer appraisal of last pedal build.

italianguy63

Re: Dub stuff
« Reply #47 on: October 20, 2017, 09:40:06 AM »
Yes.  Stephen.



I used to really be with it!  That is, until they changed what "it" is.  Now, I can't find it.  And, I'm scared!  --  Homer Simpson's dad

Kipper4

Re: Dub stuff
« Reply #48 on: October 20, 2017, 04:15:27 PM »
/\ yer.......:)

What would the mad professor have.

Pretty much something like this.





I suspect it's a 4069 lfo and an cd4046 vco.

I don't get how he does the hp lp filtering.
I'm guessing at most of the rest.
"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

Kipper4

Re: Dub stuff
« Reply #49 on: October 24, 2017, 09:51:45 AM »
I've spotted an error
IC1A the schmitt triggers pins are wrong.
Resistor goes to + input.
"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

Kipper4

Re: Dub stuff
« Reply #50 on: October 24, 2017, 12:48:22 PM »
Try this.
Plenty of possible sounds.

"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

duck_arse

Re: Dub stuff
« Reply #51 on: October 25, 2017, 09:58:11 AM »
I thought you'd called it "Siren Siesta" for a second, that couldn't be right. one thing - that L 470k - is that meant to be across the "3" lug?
".... just enough bling hardware to complement the quiet textured slip-proof pants ...." - customer appraisal of last pedal build.

bluebunny

Re: Dub stuff
« Reply #52 on: October 25, 2017, 10:07:11 AM »
I did a Java course in Sirensista years ago.  Nice town.  Love the Cotswolds.
  • SUPPORTER
Ohm's Law - much like Coles Law, but with less cabbage...

Kipper4

Re: Dub stuff
« Reply #53 on: October 25, 2017, 10:07:35 AM »
Oops
I left that in from a previous version.
It can be ommitted.

Please could you fill me in on the bjt switching you mentioned earlier Stephen I'm not quite sure what you meant or how its done.
Thanks

Was the mad professor thing a piss take btw?

Currently exploring ways to get a very slow air raid siren sound with an extra lfo.
I think i'm gonna need some help with it.
I did find this geofx article where RG uss a rectifier on the output to do this.
http://www.geofex.com/FX_images/ramp-lfo.pdf


Is this the way to go.

Rich

"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

Kipper4

Re: Dub stuff
« Reply #54 on: October 25, 2017, 10:08:54 AM »
Me too Marc. I lived there for a time as a boy.
Beautiful place.
"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

Kipper4

Re: Dub stuff
« Reply #55 on: October 26, 2017, 12:58:58 AM »
Fat is where it's at

https://youtu.be/LIUPINfKNno

Sent from my SM-G920F using Tapatalk

"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

duck_arse

Re: Dub stuff
« Reply #56 on: October 26, 2017, 10:04:43 AM »
fatty got no "moo" nob.
".... just enough bling hardware to complement the quiet textured slip-proof pants ...." - customer appraisal of last pedal build.

Kipper4

Re: Dub stuff
« Reply #57 on: October 26, 2017, 10:52:58 AM »
Fattys got no mute. using a fader with his fancy rackmount siren.

I however am working on something. Thanks for the diagram, help and advice.

It's not moot yet.....

Hollie Cook (daughter of sex pistol) Horseman and Fatty (who is not fat)

"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

Kipper4

Re: Dub stuff
« Reply #58 on: October 27, 2017, 03:17:44 PM »
What say I wanted to modulate a lp filter on or near the output.
Using the existing lfo.
What's my best options ?
"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

Kipper4

Re: Dub stuff
« Reply #59 on: October 29, 2017, 04:29:28 AM »
I found this ADSR envelope generator from YuSynth.

http://www.yusynth.net/Modular/Commun/ADSR/ADSR555-sch.gif

While I realise it's intended for use with a synth. I wonder would this work as a ADSR to control my cv in above above posted schematic.

Heres my redraw



thanks for any help in advance
Rich
"Duck_Arse
otherwise, you might end-up with SOIC or gullwings, for surface mounts."


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/