Bixonic - Expandora  [traced]

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Re: Bixonic - Expandora  [traced]

Postby choudy » 09 Feb 2010, 21:32

Thanks for reply.
I've already found an error. One of LM308 was halfway broken. At least i've designed new pcb layout and found complete schematics (thanks archive.org) :-)
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Re: Bixonic - Expandora

Postby Renegadrian » 10 Feb 2010, 15:59

So summing it up, has anyone successfully built an Expandora (ver.1)?!
Are those schems/layouts verified?!
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Re: Bixonic - Expandora

Postby choudy » 16 Feb 2010, 23:58

Yeah, I've finally build Bixonic Expandora. Posted schematic is verified and better than one from RG Keen site. I have to do some final cleanup in layout, so please be patient.
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Re: Bixonic - Expandora

Postby Renegadrian » 17 Feb 2010, 01:58

WOW :applause:
I could need to build one for a friend in the next weeks - keep us posted of new layouts!
Thank you!
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Re: Bixonic - Expandora

Postby Zztop128 » 16 Apr 2010, 09:36

Great pedal, I've got the original and it does sound great.
For wich reason is the RN2206 used?
And isn't R11(1M) too big?
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Re: Bixonic - Expandora

Postby Zztop128 » 09 Jun 2010, 17:28

I've just build this pedal.
I used an LDR and an LED instead of using the Sharp opto unit. That was not a very good idea, so I ordered a H11F2 optocoupler. I also discovered that the 2N3703 isn't doing anythng. I assume that it should amplify the signal it gets from IC3?
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Re: Bixonic - Expandora

Postby caspercody » 12 Jun 2010, 17:08

Does anyone know the difference from the original to the EXP-2001? The 2001 has a drive pot on it.
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Re: Bixonic - Expandora

Postby cbriere » 12 Jun 2010, 17:32

caspercody wrote:Does anyone know the difference from the original to the EXP-2001? The 2001 has a drive pot on it.


I have a EXp-2001, and i open it up to see what is inside.
The IC is not a 308, it 's a tlo72
i can put pics here if needed.
I should also receive the schamtics soon.
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Re: Bixonic - Expandora

Postby caspercody » 13 Jun 2010, 01:46

Thanks! Would love to see pictures, and the schematic.
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Re: Bixonic - Expandora

Postby caspercody » 22 Nov 2010, 01:28

Any news on the 2001 schematic, or pictures?

Thanks
Rob
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Re: Bixonic - Expandora

Postby cbriere » 22 Nov 2010, 01:46

caspercody wrote:Any news on the 2001 schematic, or pictures?

Thanks
Rob


it is here
http://freestompboxes.org/viewtopic.php?f=1&t=9834&p=106768&hilit=bixonic#p106768
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Re: Bixonic - Expandora

Postby caspercody » 22 Nov 2010, 02:15

Thanks! Has anyone made it, to verify it is correct?
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Re: Bixonic - Expandora

Postby Barry » 13 Apr 2011, 02:40

cbriere wrote:
caspercody wrote:Does anyone know the difference from the original to the EXP-2001? The 2001 has a drive pot on it.


I have a EXp-2001, and i open it up to see what is inside.
The IC is not a 308, it 's a tlo72
i can put pics here if needed.
I should also receive the schamtics soon.



Wouldn't that be a TL071?
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Re: Bixonic - Expandora

Postby azrael » 09 Jul 2011, 17:48

Does anyone have the transfer to choudy's layout?
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Re: Bixonic - Expandora

Postby choudy » 10 Jul 2011, 10:53

Here it is.
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Re: Bixonic - Expandora

Postby quickapple » 16 Sep 2011, 08:16

Hi

What is the CI noted in Figure 5, I want to try this pattern. :D

Thanks
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Re: Bixonic - Expandora

Postby mich » 18 Sep 2011, 03:37

4u7
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Re: Bixonic - Expandora

Postby quickapple » 18 Sep 2011, 09:42

Thanks

But my poor english would say: IC noted 5 in the schematic
Sorry
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Re: Bixonic - Expandora

Postby Joe L » 12 Feb 2012, 22:10

Renegadrian wrote:So summing it up, has anyone successfully built an Expandora (ver.1)?!
Are those schems/layouts verified?!


Almost finished with mine. I found a direct cross reference to the Toshiba RN2206 transistor used to sink the current through the opto. The NTE2370 even has the correct internal bias resistors and specs so it should work perfectly. I found Newark and Moyer Electronics stock the part but am still looking to see if Mouser has a direct cross reference in a different brand.

..Joe L
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