PWM phaser in the works

[Kipper4]

So I've been looking at the chips for this and noter rthatthere are two varieties
CD40106BNC and CD40106BE

CD4066BNC and CD4066BE

Which should i use.
I'm guessing one is a buffer version?

[Freppo]

I'm using the BE versions

[anotherjim]

I'd say the BE, but I don't think the other kind is radically different - they're all buffered series (Hence the B). BE are the usual vanilla plastic DIP package. UBE would be un-buffered versions (if they existed).

[Kipper4]

Thanks. time to order the chip then.

[duck_arse]

the 4066 "quad analog switch" will/might have buffering on the erm, lever? throw? control? input, but the switch is analog, so no buffers.

the 40106 is a schmitt, so it will have extra internal junk that will equate to buffers, even if it doesn't have straight-out buffers

[Kipper4]

Erm yer.
I'm not familiar with theses two chips the 4066 switching and 40106 schmitt.

Looking at the pinout for the 4066 I guess Vdd (pin 14 on TI pdf) is +9v ?
and VSS (pin 7 on the TI pdf) is ground correct ?

also seen here
http://en.wikibooks.org/wiki/Practical_Electronics/IC/4066

[anotherjim]

Yep. Vdd = pos and Vss = neg are the power supply names on CMOS chips.

[Kipper4]

Thanks Jim another bit of brain fodder for me. I never knew that for CMOS chips


Ok another question
Is it ok to leave the unused pins on the CD40106 unterminated ?

I'm nearing completion on my pad per hole layout.

[armdnrdy]

I'm nearing completion on my pad per hole layout.

Wouldn't it be a better idea to wait a bit until Freppo comes up with a working drawing that he's happy with?

His last few posts outlined a ticking issue and possible changes in ICs.

[Kipper4]

Yer I was going to wait Larry.
and my layout refers to his earlier breadboard schematic.
I know Freppo Is busy doing his test.
I'm just trying to get my head around some of these new to me chips. and learn some more about best practices in layouts.
No offense meant.

[armdnrdy]

No offense meant.

I think you took this wrong...I am not offended in anyway...how could I be?

and I didn't intend my last post to be taken in a demeaning manner.

I was purely making a suggestion from my observation.

I know that when I....and just about everyone...is working out a project...there can be many changes until it has reached fruition.
I didn't want to see you waste time on an unfinished design.

Imagine if someone did a layout every time Rob (deadastronaut) posted a new drawing! Hi Rob!

There would be fifty wrong layouts floating around before the final drawing hit the thread! 

[GodSaveMetal]

Yer I was going to wait Larry.
and my layout refers to his earlier breadboard schematic.
I know Freppo Is busy doing his test.
I'm just trying to get my head around some of these new to me chips. and learn some more about best practices in layouts.
No offense meant.

Me too; I made a redrawing of all waiting for the test!!! I stay TUNED!!!!

[bluebunny]

Is it ok to leave the unused pins on the CD40106 unterminated ?

Tie the unused inputs to V_DD or V_SS, otherwise it'll go bonkers.  You can leave the outputs unconnected.

Imagine if someone did a layout every time Rob (deadastronaut) posted a new drawing! Hi Rob!

Ha ha!  With three or four schemos per page and forty or fifty pages in a thread, the world would run out of components!   

[deadastronaut]

oi!..this is cyberbullying..i'm telling the administrators



i get there in the end eventually though eh..

[armdnrdy]

i get there in the end eventually though eh..

Two years in the making....may I introduce to you....the One Knob Fuzzerator! 

[Freppo]

Lol guys.. that's mean (but funny) 
I suspect this phaser will go through a few revisions too before the final version

Unfortunatly the phaser project will be on hold for a little while now.
Work, relationship.. life, you know... 

Hopefully I can pick it up again in a couple of weeks and present a good layout not long after that.
Stay tuned!

[bluebunny]

oi!..this is cyberbullying..i'm telling the administrators

You know we love ya really, mate!  

i get there in the end eventually though eh..

You do indeed.  And that's why we love ya.

[deadastronaut]

 

[anotherjim]

Personally, I find those blow by blow, watch it develop threads, very entertaining and educational. Keep at it Rob!

Freppo, l'll look forward to seeing your next moves soon I hope.

[Freppo]

Hey folks

I've been playing around with the phaser for a couple of days now.
I decided that the dual LFO thing didn't really work out so I ditched it
So now i'm back almost where I started, with a fairly simple version.
The big difference is that I changed the LFO. Now it has a better sweep.
It should be dead quiet aswell, no ticking or noise.



Sorry about the tiny size. My website editor is down at the moment, so I can't upload files.
I will share a fullsize image when it is online again.

I have made a new PCB layout, just need verify it...

/ Freppo