TDA1022 Flanger

[StephenGiles]

This is a tremendous piece of work, many thanks. We fly to Austria on Friday so I'll print a copy for in flight reading!

[Thomeeque]

This is a tremendous piece of work, many thanks. We fly to Austria on Friday so I'll print a copy for in flight reading!

I'm honored! Enjoy your flight! T.

[oldschoolanalog]

Wow and Thanks! Way above & beyond the call of duty .
Now to get somebody to etch a couple of boards for me. Hmmm...
Thanks again and all the Best,
Dave

[Thomeeque]

Wow and Thanks! Way above & beyond the call of duty .
Now to get somebody to etch a couple of boards for me. Hmmm...
Thanks again and all the Best,
Dave

Thanks Dave & good luck with the build (I hope you won't curse on me too much )! T.

[Thomeeque]

Hi!

So here it is:

EM1022_Build_Instructions.pdf

Hi!

I have found alternative for used DP3T slide switches (which seems to be bit problematic to get):

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=450-1576-ND

By quick overview of it's datasheet I'd say, that it should be 100% twin of type I have used (so it should perfectly fit into PCBs from the guide), but double-check it yet, please, I may be wrong.


Edit: Sorry, I was wrong, now I see that pin distances are different I'll keep searching..

Good luck, T.

Btw. if somebody knows about other alternatives, please, let us know.

[Thomeeque]

 OK, so far I was able to dig out the manufacturer of the switch I'm using (MS-034), it's:

Marushin Electric Mfg Co Ltd (EST?) (all their slide switches catalogue)

Maybe it will be useful somehow (even the look of the page and the weird URL does not make very optimistic impression - it's like trip 10 years back or something )

T.

[Thomeeque]

 For those confused by MS-034 slide switch function and pinout:



Orange box represents slider in one of it's three positions, gray A0/B0 pins are internal only.

(I'll put it into PDF eventually as well)

T.

[newperson]

hello,
is this layout good to go without any issues? 
http://thmq.mysteria.cz/em1022/EM1022_Build_Instructions.pdf

thanks for that work and build notes.  very impressive.

[oldschoolanalog]

...is this layout good to go without any issues? 
http://thmq.mysteria.cz/em1022/EM1022_Build_Instructions.pdf

I have completed the main board and it works perfectly.
I'm in the process of populating the buffer board (and finishing the project).
So far, so good . One note. If you are unable to locate a source for the 4 switches, Small Bear has a workable substitute:
http://www.smallbearelec.com/Detail.bok?no=495
Not an exact fit , but if you change the artwork for the buffer board a bit it will fit/work.
I'll post a build report upon completion of the project.
Dave

[newperson]

glad to hear.  do you think that you will be finished by the weekend?  maybe i will just wait for your build report.  would rotary switches work okay?

[Thomeeque]

hello,
is this layout good to go without any issues?  
http://thmq.mysteria.cz/em1022/EM1022_Build_Instructions.pdf

thanks for that work and build notes.  very impressive.

Thank you! Besides this slide-switch issue mentioned by Dave already, there may be problem with D2 - even the Tonepad's schematic calls for 1N4001, it did not work for David (no clock). I have tried 1N4007 at the beginning (as I mention in the guide, I did not get any 1N4001 here in Prague - all shops here sell only the 1N4007 from whole 1N400x line), and it did not work well either (my clock was ticking, but at lower frequency then required). I have 1N4148 there instead now, Dave 1N914, both seem to work well.

would rotary switches work okay?

Basically any dual (single for FEEDBACK) 3T switch will work, but the wiring may give you headache (that was maybe main reason, why I have picked directly PCB soldered switches). I'd advice you to check your possibilities to get proper switches first. Plus it should not be big deal to adopt PCB layout for similar kind of switches (like those linked by Dave).

T.

[frank_p]

Very impressive work, documentation and very good youtube demo.
This is very well done.
Bravo !

H.F.

[Thomeeque]

Very impressive work, documentation and very good youtube demo.
This is very well done.
Bravo !

H.F.

Thanks, frank, I'm delighted!

T.

[oldschoolanalog]

Finally finished this. Alot of  time was spent testing & deciding what features would suit me best. F'back & Mix gave the most versatility for my style. Sounds beautiful (I can get that "Walking on the Moon" sound. This makes me a happy camper!). Takes up a minimum of pedalboard space. Thomas' design lends itself to a wide variety of possibilities. You can use all the features he has put into this, or pick the ones you want. A  TZF option could be easily added. See that empty space for the 4049? With a bit of thought & modification a nice distortion circuit could be put there. Jet Flange anybody? The amount of things that can be done are only limited by ones imagination & willingness to do them. I opted to install a 9V regulator circuit on the buffer board (required drilling a few holes). So, what are you waiting for? Go build one!
Questions?
 
Guts:
http://i175.photobucket.com/albums/w121/oldschoolanalog/DSC01218.jpg
http://i175.photobucket.com/albums/w121/oldschoolanalog/DSC01219.jpg
All boxed up:
http://i175.photobucket.com/albums/w121/oldschoolanalog/DSC01225.jpg
All the Best!
Dave

[Thomeeque]

Finally finished this. Alot of  time was spent testing & deciding what features would suit me best. F'back & Mix gave the most versatility for my style. Sounds beautiful (I can get that "Walking on the Moon" sound. This makes me a happy camper!).

Oh, that's great! Congratulations!

Takes up a minimum of pedalboard space. Thomas' design lends itself to a wide variety of possibilities. You can use all the features he has put into this, or pick the ones you want. A  TZF option could be easily added. See that empty space for the 4049? With a bit of thought & modification a nice distortion circuit could be put there. Jet Flange anybody? The amount of things that can be done are only limited by ones imagination & willingness to do them.

Exactly, you could modify and/or adjust EM circuit probably forever: some other, very simple mods (allowing you to get your own sound out of it) could be feedback capacitor (C4) switch, dry/wet ratio pot, replacing RT4 by pot (moves sweep range), bigger POT3_RANGE value (220k?) to get deeper sweep etc. (all part names as found in pdf)

I opted to install a 9V regulator circuit on the buffer board (required drilling a few holes). So, what are you waiting for? Go build one!
Questions?
 
Guts:
http://i175.photobucket.com/albums/w121/oldschoolanalog/DSC01218.jpg
http://i175.photobucket.com/albums/w121/oldschoolanalog/DSC01219.jpg
All boxed up:
http://i175.photobucket.com/albums/w121/oldschoolanalog/DSC01225.jpg
All the Best!
Dave

Nice one!

Thanks for this report, Dave! Cheers, T.

[oldschoolanalog]

Thank you for all the work you put into this Tomas!
To answer the Q:

...is this layout good to go without any issues? 
http://thmq.mysteria.cz/em1022/EM1022_Build_Instructions.pdf

Yes, it's good to go .
And, additional thanks to bluesdevil for the nice PCBs he fabricated for me. They made life alot easier!
Dave

[Razvan S.]

I finally finished (well sort of, don't have it boxed yet) my build too!
Thank you Thomeeque! for your help and troubleshooting mails! 
I think according to Thomeeque, this is the 3rd build of his project 
In order to get things straight, I'll first post some pics and maybe a short sample, and then I'll explain what further modifications are a must to this project(in my opinion anyway). Thomeeque helped me a lot in solving some noise AM radio like interference issues, and other crucial stuff.

Photos:

http://forums.rgc.ro/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=89270
http://forums.rgc.ro/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=89271
http://forums.rgc.ro/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=89272
http://forums.rgc.ro/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=89910
http://forums.rgc.ro/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=89908

Short sample:

http://forums.rgc.ro/index.php?app=core&module=attach&section=attach&attach_id=90225

Initial! Noise sample without 4049 Clock Buffer in my build:

http://forums.rgc.ro/index.php?app=core&module=attach&section=attach&attach_id=90226

Some modifications are: Diode D2 has to be changed to 1N4148 from 1N4001, or else the flanger will not sweep.
R1 changed to 100K from 10 K and also  a 150-300 pf cap put in between pin 3 of the 4558 and ground.
I got rid of the unwanted noise by using the 4049 clock buffer. 

[Thomeeque]

 Hello Razvan,

Welcome at this forum

Thank you very much for your report and congrats to The World's 3rd EM1022 (AFAIK) again!

For others:

1N400x as D2 never worked well for me either, if you would build it, start with 1N4148 there.

Changing R1 to 100k and adding filtering cap 150p was my idea (stolen from modern DEM) how to try to fight with (most probably) AM radio interferences (leading to "UFO" sounds caused by heterodining with clock frequency):



But Razvan has got rid of those interferences already by using optional clock buffer (which honestly does not make much sence to me, but maybe it was just eliminated thanks to changed wiring or something), which he has wired before R1/Cf mod, so we don't know how useful R1/Cf mod is..

T.

[Razvan S.]

Yes, the interference was gone with the help of the optional clock buffer, but R1/Cf mod helped too. It tamed it down even more.
You could recommend this as an optional heh    but it doesn't hurt ! Thanks again 

[vasjum]

I have some TDA1022!

http://www.ebay.de/itm/221042006077?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649