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 Forum index » DIY Hardware and Software
Elby - Pixie!!!! anyone else?
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Ypsi_Synth



Joined: Nov 08, 2008
Posts: 44
Location: Ypsilanti Mi
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PostPosted: Sun Nov 23, 2008 1:44 am    Post subject: Elby - Pixie!!!! anyone else? Reply with quote  Mark this post and the followings unread

anyone else building this? Im currently building one and it sure would be great to talk to others how have built or is building one of these. I know someone here is getting ready to from another post I read.
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Ypsi_Synth



Joined: Nov 08, 2008
Posts: 44
Location: Ypsilanti Mi
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PostPosted: Sun Nov 23, 2008 4:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

has anyone even ever looked into one of these? I just feel so alone Crying or Very sad
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State Machine
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Joined: Apr 17, 2006
Posts: 2743
Location: New York
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PostPosted: Sun Nov 23, 2008 8:44 pm    Post subject: Reply with quote  Mark this post and the followings unread

I am not building one but it sure looks interesting to me. The MIDI controlled dual DCO topology, using a processor not seen very much around these parts, is refreshing to see. I would like to see more of this project as you go through the build.

Nice !
Very Happy
Bill
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Ypsi_Synth



Joined: Nov 08, 2008
Posts: 44
Location: Ypsilanti Mi
Audio files: 4

PostPosted: Sun Nov 23, 2008 9:30 pm    Post subject: Reply with quote  Mark this post and the followings unread

I just got the midi interface together and working today. I had a bad 2n3904 Fairchild tranny from mouser that had me stumped for a while. 2nd bad batch of Fairchild trannies I got! Mad

Elby is very good about responding to emails. Just wanted to toss that in.

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State Machine
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Joined: Apr 17, 2006
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Location: New York
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PostPosted: Mon Nov 24, 2008 5:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
I just got the midi interface together and working today. I had a bad 2n3904 Fairchild tranny from mouser that had me stumped for a while. 2nd bad batch of Fairchild trannies I got!
Elby is very good about responding to emails. Just wanted to toss that in
.

Unusual to get bad transistors but sure, it can stump you for a bit since it is very unexpected Shocked

I would really like to hear some sounds from this synthesizer when your done. I have been tossing around lots of ideas of my own design but am torn between using a fast Microcontroller or using an FPGA for my oscillators. I could also use a hybrid design and use an MCU for control, interfacing, and MIDI and use the FPGA for multiple oscillators.

This is a cool project your working on. Cool

Also, good to know Elby has good customer service to Wink

Bill
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bugbrand



Joined: Nov 27, 2005
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PostPosted: Mon Nov 24, 2008 6:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

Does look interesting, indeed!

Weird -- I just looked at the Glide circuit Elby have for the Wasp -- its a 4046 PLL. Hmm, fun.

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jochem



Joined: Aug 10, 2008
Posts: 56
Location: groningen

PostPosted: Sat Nov 29, 2008 1:25 am    Post subject: Reply with quote  Mark this post and the followings unread

I would love to build one of these. The sound should be insane.
Unfortunately it's too expensive and difficult for me right now.

Would like to see some of your progress Very Happy
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Ypsi_Synth



Joined: Nov 08, 2008
Posts: 44
Location: Ypsilanti Mi
Audio files: 4

PostPosted: Thu Dec 11, 2008 4:15 am    Post subject: Reply with quote  Mark this post and the followings unread

Well, here is a bit done on 1 of 2 wasp clone boards. read my blogger for more info.
http://ypsisynth.blogspot.com/


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Ypsi_Synth



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PostPosted: Sun Feb 01, 2009 3:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

After a long brake im back to building it. I dont think this jpeg will show up to good but it will give an idea of the layout.
I think I may build a case with keyboard like the minimoog style look for it.


Drawing1.1s-Model.bmp
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Etaoin



Joined: Jun 30, 2005
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Location: Utrecht, NL

PostPosted: Wed Feb 04, 2009 12:46 am    Post subject: Reply with quote  Mark this post and the followings unread

Ypsi_Synth wrote:
I dont think this jpeg will show up to good


The jpeg seems to have warped into a bmp, even Very Happy

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Ypsi_Synth



Joined: Nov 08, 2008
Posts: 44
Location: Ypsilanti Mi
Audio files: 4

PostPosted: Wed Feb 04, 2009 12:58 am    Post subject: Reply with quote  Mark this post and the followings unread

Etaoin wrote:
Ypsi_Synth wrote:
I dont think this jpeg will show up to good


The jpeg seems to have warped into a bmp, even Very Happy


Isn't it CRAZY!!!!! Laughing

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Ypsi_Synth



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PostPosted: Sun Feb 15, 2009 3:42 am    Post subject: Reply with quote  Mark this post and the followings unread

Got it wired up. The rats nest is temp. It will be pretty when boxed.
It draws 120 mWatts.

Man, I have never heard a Wasp filter in person, and this dual filter is the cats azz.... IT SOUND AMAZING!!

Im still working out a few little bugs but its going good. Now lets tackle this filter 3.....
5 filter modes!!!!


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jochem



Joined: Aug 10, 2008
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PostPosted: Sun Feb 15, 2009 4:18 am    Post subject: Reply with quote  Mark this post and the followings unread

Looks messy indeed, but i guess thats hard to avoid considering the amount of pots you have. No problems on the PCB front?

I would be interested to know how much money you spent on parts.

Good luck with the rest if the wiring Very Happy
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Ypsi_Synth



Joined: Nov 08, 2008
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PostPosted: Sun Feb 15, 2009 4:45 am    Post subject: Reply with quote  Mark this post and the followings unread

I think I have about $350 US dollars in parts. And about 80hours so far Wink

There are a few things that need tweeking on the PCB but nothing to difficult.

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Ypsi_Synth



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PostPosted: Sun Feb 15, 2009 5:27 am    Post subject: Reply with quote  Mark this post and the followings unread

I will get some sound bytes up soon.... but now I go to bed.. it 7:30am yall!
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cyberheater



Joined: Jun 03, 2008
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PostPosted: Sun Feb 15, 2009 1:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

Ypsi_Synth wrote:
After a long brake im back to building it. I dont think this jpeg will show up to good but it will give an idea of the layout.
I think I may build a case with keyboard like the minimoog style look for it.


There's a typo on the VCA ENV generator. Just to let you know before you spend money getting it printed.
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Ypsi_Synth



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PostPosted: Sun Feb 15, 2009 3:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

cyberheater wrote:
Ypsi_Synth wrote:
After a long brake im back to building it. I dont think this jpeg will show up to good but it will give an idea of the layout.
I think I may build a case with keyboard like the minimoog style look for it.


There's a typo on the VCA ENV generator. Just to let you know before you spend money getting it printed.


Thanks.. There are a few others of them I found on it too... its the prototype Wink

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joshco



Joined: Nov 14, 2008
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PostPosted: Mon Feb 16, 2009 2:51 am    Post subject: Reply with quote  Mark this post and the followings unread

nice work, looking forward to some sound samples...
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cyberheater



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PostPosted: Mon Feb 16, 2009 3:46 am    Post subject: Reply with quote  Mark this post and the followings unread

Ypsi_Synth wrote:
cyberheater wrote:
Ypsi_Synth wrote:
After a long brake im back to building it. I dont think this jpeg will show up to good but it will give an idea of the layout.
I think I may build a case with keyboard like the minimoog style look for it.


There's a typo on the VCA ENV generator. Just to let you know before you spend money getting it printed.


I only saw one. You've got better eyes then I have... Smile

Thanks.. There are a few others of them I found on it too... its the prototype Wink
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Ypsi_Synth



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PostPosted: Mon Feb 16, 2009 4:33 am    Post subject: Reply with quote  Mark this post and the followings unread

Well... a few things, there is a bit of processor noise? (maybe) in the output, nothing horrible but you can hear it a bit at times depending on the filter setting. It can be eq'ed out to an extent.

Then VCF 3 if not working right. mostly caused but the circuit only getting 5 volts. Not sure how im going to get around this one... maybe leave it out all together?

then the LFO does not modulate the pitch very smoothly. Maybe its just the character of this synth.. yah, thats it Wink

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Ypsi_Synth



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PostPosted: Mon Feb 16, 2009 7:27 am    Post subject: Reply with quote  Mark this post and the followings unread

jochem wrote:
Looks messy indeed, but i guess thats hard to avoid considering the amount of pots you have. No problems on the PCB front?

I would be interested to know how much money you spent on parts.

Good luck with the rest if the wiring Very Happy


I have all the parts to make another.... I don't know if I have it in me to make another.... want to buy the parts?

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jochem



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PostPosted: Mon Feb 16, 2009 7:33 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Ypsi,

Sounds tempting, but i don't have a bundle of cash right now and need to order parts for my MB808 first.

I'm sure there are more people interested in this project. Maybe selling it as a complete kit (with PCB)?

cheers.
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Ypsi_Synth



Joined: Nov 08, 2008
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PostPosted: Mon Feb 16, 2009 8:54 am    Post subject: Reply with quote  Mark this post and the followings unread

jochem wrote:
Thanks Ypsi,

Sounds tempting, but i don't have a bundle of cash right now and need to order parts for my MB808 first.

I'm sure there are more people interested in this project. Maybe selling it as a complete kit (with PCB)?

cheers.


yep.. all... Id sell it all for 200 shipped.. if not I can build it some rainy day Wink

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Ypsi_Synth



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PostPosted: Tue Feb 17, 2009 1:38 am    Post subject: Reply with quote  Mark this post and the followings unread

hear is the noise issue We're working on right now... I have some capacitors to try in the circuit (when I get them from mouser). I hope they can clear up the noise.... but I think it is bleed through from the Pulse (from the m16c microprocessor) that controls the DCO's because you can hear it track as I move up and down the keyboard.


pixie noise.wav
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pixie noise 2.mp3
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Hear you can hear it as the filter is opened up and lowered.

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 Filename:  pixie noise 2.mp3
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Ypsi_Synth



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PostPosted: Tue Feb 17, 2009 2:08 am    Post subject: Reply with quote  Mark this post and the followings unread

hear (hear.. get it...) are a few more....


pixie (wasp) sounds.mp3
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pixie filter modes.mp3
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