Friedman BE-OD Pedal

[Frank_NH]

There's a schematic at FSB that looks like it ready to go.  Pedal sounds great from the demos.

http://www.freestompboxes.org/viewtopic.php?f=7&t=27775&start=40

[Alex]

Hi Frank!
I've being watching that thread for a while.
I don't think there's a final schematic yet.
Lot of guessing.

[Frank_NH]

Yes - it's getting close.  I think one of the latest pdf schematics looked pretty complete.  The tone controls are interesting, which is one reason I think it would be a good build.  Also, the clipping is LED-based, and I like LED clippers in general.

[velouriafx]

Any news?

[Alex]

Schematic has been updated.
I'm drawing a layout but some values are missing.
Will have to be tested.

[GrooveChampion]

Oh this gonna be good.

[Frank_NH]

Excellent.  Which schematic are you using?  I would blend the last hand-drawn one with the previous schematic, which appears to show most of the component values.  If you'd like, I could simulate some part of the circuit in LTSpice to try to arrive at a specific component value that would work.

[Alex]

Hey Frank!
Done this 10 days ago but forgot about it! Too busy!
People don't seem to be too interested on FSB and there have been no inputs since the last schematic.
Double check it but it should be ok.
Hope it works!

[GrooveChampion]

I NEED TO BUILD THIS!

Can I use a B10k? C10Ks are kinda scarce.

[Frank_NH]

Great job Alex!  I'll have a look at the layout and compare it to the schematics.

[Alex]

B10K would work but the pot wouldn't react the same way.

[balazs.bencs]

I built this, and it works fine, controls seem to work fine.

For C1 and C2 I just used two 47nf caps that I had on my desk for some reason, so I'll try to experiment with those, cause I think these values are not right - it is losing some of the treble, but sounds great to me, lot of mids and bark.

[Hozy31]

I also built this using 470pf in C1 and 1nf in C2. I used 3mm red LEDs but i think 5mm will be better. Sounds pretty good IMO.

[Alex]

Cool guys! Would you call it verified? Does it sound similar to the original?

[GrooveChampion]

Can you explain the difference between 5mm and 3mm leds? Different forward voltages means different tones, right?

[Hozy31]

Ok i'm wrong in saying 5mm would be better, as LEDs of the same colour no matter the size have the same voltage drop as the light emitting part of a 5 mm LED is the same size as the ones used in the 3 mm LEDs. The major difference is the beam, the 5 mm ones are usually tighter collimated. I will have a go with different colours and see. However, i think its pretty close to the original as far as i can tell.

[kirshman]

What diodes? If bat54 are you soldering leads on them?

[Hozy31]

I used BAT 85s instead of 54s as there specs looked similar.

[lossamoal]

Hi guys!
I'm french, so excuse me for my poor english!
I built this board and it seems not working as well as the original. Only a crunch signal...
No leds in board are brighting... Max level and gain sound less with bypass signal.
As anyone can tell me about this?
I thank so many this blog and many people working in this, and all the information that can be found there.
I built many pedal with vero boards found, as Fuzz Factory, Triple Wreck, Small Clone... But this one gives me a hard time!
Best regards...

[kirshman]

I don't know if Alex updated this one, there's a new confirmed layout on the main page.  Might wanna check that one out.