yusynth Sawanimator

yusynth · Joined: Nov 24, 2005 Posts: 1314 Location: France

Hi all

Just an announcement of an important update of the YUSYNTH SAWANIMATOR module. I designed a new PCB which introduces a small improvement, this does not change any part and the component layout keeps the same. However the wiring diagram is now different from the previous version.

Have fun Very Happy

Yves - yusynth

tomcat · Joined: Oct 14, 2005 Posts: 141 Location: earth

You have a description of the changes?

Or still the old infos online. I have already 2 pcbs laying around but unfortunately i didnt save the old page.

yusynth · Joined: Nov 24, 2005 Posts: 1314 Location: France

Hi
The change is minor, it concerns the output connetor (2 pins), on the old pcb, only one pin (the one facing the center of the PCB) was actually connected (to the output 1K resistor), the second pin (the one facing the PCB edge) was free. On the new board the pins have been swapped and both are now connected : the one facing the PCB edge is now the actual output pin (connected to 1K resistor) and the second pin is now connected to the PCB ground.

If my explaination are not crystal clear don't hesitate to mail me I will send you the wiring diagram for the old PCB.

Cheers

tomcat · Joined: Oct 14, 2005 Posts: 141 Location: earth

Thanks, without the PCB in the hand your explanation sounds crystal clear like perrier Very Happy

Appliancide* · Posted: Wed Dec 03, 2008 5:24 pm Post subject:

Is ok to use 200k trimmers instead of the 220k ones? And for the 1uf caps is it ok to use electolytic? If so, which way should they be mounted?

Thanks and sorry if these questions have been asked before.

Paul

yusynth · Joined: Nov 24, 2005 Posts: 1314 Location: France

etaoin · Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL

yusynth · Joined: Nov 24, 2005 Posts: 1314 Location: France

Funky40 · Posted: Thu Dec 11, 2008 6:43 pm Post subject:

yusynth · Joined: Nov 24, 2005 Posts: 1314 Location: France

Well th'at's straightforward, insert your potentiometers (as in series variable resistors) before R11 and R26. if you want only o reduce the modulation range without making adjustable, just change R11 & R26 with higher values.

numbertalk · Posted: Fri Dec 12, 2008 8:18 am Post subject:

Hi Yves,

I had actually been wondering about this myself. For this circuit what size and taper of pot would you suggest for a mod depth control?

Thanks!

yusynth · Joined: Nov 24, 2005 Posts: 1314 Location: France

Hi

I'd say 470K/500K linear tap.

Cheers

Thalassa · Posted: Mon Jun 01, 2009 3:06 pm Post subject:

Hello Yves, I'm building the saw animator and I found several discrepancies between pcb layout and schematic and also with the part list

On the pcb layout there there are two 4,7K resistors that in the schematic are 1k ,also on the part list these resistors are designed as R8 and R19 but in the schematic this R8 is 100k 1% and R19 120k and also R8 is listed on the part list as 4,7K and 100K
The 1k resistors ( supposely 4,7) are listed on teh schematic as R5 and R20 that are missed on the part list.

On the part list also R9 is listed two times, as 100k ( the correct value acording with the schematic ) and other as 120K where should be R19 instead R9. The same thing with R11. The 120K resistors are R4 and R19

Also on the part list should be eight 47k resistors not six, R3 and R18 are missing on the pat list.

The only important problem is the first one ( the 4,7k resistors ) , should be 4,7k or 1k as in the schematic?

You are making a great job Yves, please don't think that with this message I'm saying the opposite Very Happy

yusynth · Joined: Nov 24, 2005 Posts: 1314 Location: France

Thalassa · Posted: Tue Jun 02, 2009 12:35 am Post subject:

Hello Yves, thanks for the information I will make the saw animator with this add . Good to know this mod before to finish the module Very Happy

numbertalk · Posted: Thu Jun 04, 2009 5:54 am Post subject:

EDIT: Disregard - the image looked big but when I printed it it was scaled correctly already.

Thanks,
Paul

Thalassa · Posted: Fri Jun 12, 2009 12:42 am Post subject:

I've finished my sawanimator and it's great Very Happy

, at the end I didn't make the mod because at this moment I don't have press and peel paper Confused

. But I think that use an external mixer is good because you can control the amount of each part present on the final mix.

I've uploaded a small demo using the Yusynth ARP filter , and the saw animator that appears on the demo at 1:10 min .

http://www.4shared.com/file/110997070/f7bd290a/Yusynth_ARP_Filter__Yusynth_Saw_Animator.html

yusynth · Joined: Nov 24, 2005 Posts: 1314 Location: France

Nice demo

Thalassa · Posted: Thu Oct 08, 2009 11:02 am Post subject:

Hello Yves , playing with the saw animator I've realized that I've made a mistake and I didn't used switched jacks on the mod inputs and also on the saw2 input. So I was checking which one to buy but I'm not sure.

Can you tell me which model jacks are you using ( switched and not switched) ?

I always buy Neutrik conectors on mouser

Thanks :

Pablo

yusynth · Joined: Nov 24, 2005 Posts: 1314 Location: France

Hi Pablo

I am using these :

Thalassa · Posted: Thu Oct 08, 2009 11:59 am Post subject:

Thanks for your reply and it's great because I was going to order few things from musikding.de Very Happy

kx · Joined: Dec 05, 2009 Posts: 17 Location: New Zealand

Hi everyone,

I've built a Yusynth Saw Animator and I'm just wondering if anyone might have any ideas about troubleshooting it...

I've made the original PCB with the addon on one board, and included switches to choose between sin or triangle modulation. The LFO circuit works great, the addon circuit all works great, but there's just a small strange thing with the wave 'shape' part of the circuit.

I'm feeding it not-quite-perfect sawtooth waves that are about +/- 4v as shown below :

Posted Image, might have been reduced in size. Click Image to view fullscreen.

and the best output waveform I can get with the 'shape' trimmer (200k) is this :

The balance trimmer works fine and all. The thing is, it is behaving exactly the same for both channels, so I don't really think it's an etching problem or soldering mistake..

Does anyone have any ideas of things to check that I could have missed? Or is it maybe just because I'm feeding it an imperfect waveform?

Thanks a lot in advance for any replies Smile

[/img]

numbertalk · Posted: Sat Dec 05, 2009 8:10 pm Post subject:

I know this circuit is very particular in regards to requiring a 10Vp-p signal that is centered around 0V.

kx · Joined: Dec 05, 2009 Posts: 17 Location: New Zealand

hmm, maybe I should just wait till I make my TH-101 which can give me saw waves to the right specification

yusynth · Joined: Nov 24, 2005 Posts: 1314 Location: France

Imperfect on input... imperfect on output...

Anyway you could expect a better output if your imperfect signal is perfectly balanced. Did you check for an offset in your imperfect sawtooth ? That is using your scope in DC mode and setting the 0V line at mid height of the scope screen, the signal is well balanced around the middle line ?
If not then you can't expect to obtain a good output signal.