Friedman BE-OD Pedal  [traced]

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
User avatar
bancika
Resistor Ronker
Information
Posts: 279
Joined: 02 Jan 2008, 02:24
Has thanked: 16 times
Been thanked: 89 times

Post by bancika »

finally got to do the labeling on my Pink Eye build. The label is printed on the transparent foil they typically use for shop windows or car decorations. It's not perfect and you can see the foil under certain angle towards the light, but it's good enough.

Image
The new version of DIY Layout Creator is out, check it out - https://github.com/bancika/diy-layout-creator
Check out my site with DIY gutars, amps and pedals http://diy-fever.com

User avatar
Cub
Cap Cooler
Information
Posts: 458
Joined: 29 Aug 2011, 07:14
Location: The Netherlands
Has thanked: 102 times
Been thanked: 118 times

Post by Cub »

Ah, Beauty! :applause: That's a fine looking pedal. The big LED in the eye and that switch-topper really add a touch of class.
I didn't know about that foil printing trick, could you tell us a little more about that?
I wish I were a chestnut tree, nourished by the sun.
With twigs and leaves and branches and conkers by the ton.

User avatar
bancika
Resistor Ronker
Information
Posts: 279
Joined: 02 Jan 2008, 02:24
Has thanked: 16 times
Been thanked: 89 times

Post by bancika »

Thanks! The foil isn't much of a trick, it's pretty common technique, but it's probably not as cheap to do in western countries for one-off small projects as it is here in Serbia. I just prepare a design in Corel or other vector based software - one drawing for the cutout template, one for the print itself and take it to a local shop that has foil printer and cutter. We probably have a dozen shops in our town who do this stuff. They do it for cheap...in this case I got 4-5 of these for free because my friend sent it for me and he knows the guy who does it :) Normally it would probably cost 2-3 bucks or something. The foil is decent quality and adheres well, it's made for shop windows and cars.

Here's an example for BE-OD, the red template is for cutter, black for printer. I put it on one drawing because it's monochromatic print, but they can print full color if I need so.

Image

For amps I usually do plastic or plexi laser engraved faceplates which are also reasonably cheap. This one cost 10 bucks to do (Zlo means evil in Serbian and is a nod to SLO which I based this preamp upon). It would probably cost less if I didn't go for the "3D look" and just engraved a rectangular faceplate...but I think it turned out nice.

Image

Cheers
The new version of DIY Layout Creator is out, check it out - https://github.com/bancika/diy-layout-creator
Check out my site with DIY gutars, amps and pedals http://diy-fever.com

User avatar
Cub
Cap Cooler
Information
Posts: 458
Joined: 29 Aug 2011, 07:14
Location: The Netherlands
Has thanked: 102 times
Been thanked: 118 times

Post by Cub »

Thank you for explainging! They offer tinting at the local car-audio store, but I have no idea about printing.
That Zlo preamp looks amazing!
I wish I were a chestnut tree, nourished by the sun.
With twigs and leaves and branches and conkers by the ton.

User avatar
bancika
Resistor Ronker
Information
Posts: 279
Joined: 02 Jan 2008, 02:24
Has thanked: 16 times
Been thanked: 89 times

Post by bancika »

These shops are not primarily car related. More like kinkos in the states...but less fancy and can do more stuff for less money :) they make ads, billboards, promo material, keychains, pens...you get the idea. Tinting foils are different and they probably don't print on those. These foils are more for logos like this

Image

They usually do bigger projects in larger quantities than what I do, but I was turned down only once when I wanted to do custom printed grill cloth for a 1x8" cab...they typically print much larger mesh cloths and couldn't be bothered with my little project. But the rest was fine and cheap. Here are few more examples of what I did with laser

Image

Image
The new version of DIY Layout Creator is out, check it out - https://github.com/bancika/diy-layout-creator
Check out my site with DIY gutars, amps and pedals http://diy-fever.com

User avatar
bucksears
Solder Soldier
Information
Posts: 172
Joined: 08 Sep 2007, 23:02
Has thanked: 16 times
Been thanked: 41 times

Post by bucksears »

So I just etched Frabbio's layout, then saw that it takes the BAV99-type diodes.
Is there an available replacement for those? Or are the ones sold by Tayda workable?

Thanks

User avatar
caspercody
Resistor Ronker
Information
Posts: 388
Joined: 15 Jul 2009, 14:34
Has thanked: 34 times
Been thanked: 48 times

Post by caspercody »

I used 1N457 diodes, and they work great.

User avatar
Step
Information
Posts: 1
Joined: 15 May 2018, 19:23

Post by Step »

Body GAINTA B013, polymer paint, printing on paper with a sticky layer, 3 layers of varnish.
Own Board, parts too: D I work in the wholesale supply of electronic components in Russia,so the cost of about $20, I do not remember exactly.
Inside 2 of the Board, the effect of "all aboard" and switching card. I hate soldering wires...
Attachments
Friedman S1.jpg

User avatar
ascianabhro
Information
Posts: 4
Joined: 02 Mar 2018, 21:39

Post by ascianabhro »

Frabbio wrote:Single sided layout for Dirty Shirley+Friedman BeOd in a box, this layout has the best of both worlds, there are 7 pcb mounted pots so you can build a BeOD with a mid control, or a DS with a tight knob, as said before the only notable difference is R16 in my schematic (10k for BEOD, 27k for DS).

I used through hole ICs this time, but i kept the smd diodes (BAV99). If somebody is interested i can post the same layout with normal diodes.
Board dimensions are 115x40mm, it should fit in a hammond bb enclosure.
Layout still unverified but it should work.

If you build it please report if everything is working as intended.

Good DIY!
Can you post the layout with normal diodes, Thanks

User avatar
bucksears
Solder Soldier
Information
Posts: 172
Joined: 08 Sep 2007, 23:02
Has thanked: 16 times
Been thanked: 41 times

Post by bucksears »

ascianabhro wrote:Can you post the layout with normal diodes, Thanks
Ditto - I'd love the option of using standard silicons for this circuit.

User avatar
Frabbio
Breadboard Brother
Information
Posts: 81
Joined: 27 Jul 2010, 13:25
Has thanked: 11 times
Been thanked: 97 times

Post by Frabbio »

Layout with normal diodes in DO-35 package
Attachments
beodtransf.jpg
beodlayout.png

User avatar
bucksears
Solder Soldier
Information
Posts: 172
Joined: 08 Sep 2007, 23:02
Has thanked: 16 times
Been thanked: 41 times

Post by bucksears »

Frabbio wrote:Layout with normal diodes in DO-35 package
THANK YOU!!

User avatar
ascianabhro
Information
Posts: 4
Joined: 02 Mar 2018, 21:39

Post by ascianabhro »

Frabbio wrote:Layout with normal diodes in DO-35 package
Thanks a lot

User avatar
peterc
Information
Posts: 41
Joined: 30 Mar 2010, 18:58
Location: Jozi
Has thanked: 86 times
Been thanked: 3 times
Contact:

Post by peterc »

Hi all

Would really like to build the layout on this page

Postby Frabbio » 16 Jun 2018, 15:48

Layout with normal diodes in DO-35 package


Does any one have the component values for this layout? They dont seem to follow any of the schematics I have found

Thx Peter

User avatar
Jan1966
Breadboard Brother
Information
Posts: 66
Joined: 15 Dec 2014, 19:17
Has thanked: 14 times
Been thanked: 14 times

Post by Jan1966 »

Hey
There is enough information for you to see the component values. Do you need to be spoon fed?
All here man.

BW

User avatar
Allyl.isothiocyanate
Information
Posts: 1
Joined: 15 Jan 2018, 11:46

Post by Allyl.isothiocyanate »

Good day everybody.

I made myself a BE-OD clone following the main schematic on this thread, in other words, the one where the presence control is most similar to the ProCo RAT's.

As with most other people who have been debugging and troubleshooting the schematic, I am experiencing problems with oscillation, particularly when turning the volume up at around 60-70% of the rotation. This is with all the other controls at noon, including the trimpot. I am using a 120pF capacitor rather than a 470pF.

I noticed that member bajaman's version adds a few components, and ties the presence control to the inverting input of the op amp stage with the trimpot. I have not tried this version, so I was wondering if anyone else has tried to A/B the two versions of the circuit to see which one was more prone to oscillation, etc.? I'm trying to figure out whether it's a layout issue, the wrong circuit or something else on my personal build.

I'm not sure if it's much help, but I'm posting a photo of my perfboard layout.

Image

Thanks in advance.

User avatar
Frabbio
Breadboard Brother
Information
Posts: 81
Joined: 27 Jul 2010, 13:25
Has thanked: 11 times
Been thanked: 97 times

Post by Frabbio »

HI, you should keep your wires as short as possible, especially the input wire and the wires that go to the pots.

User avatar
Cigla tel.
Information
Posts: 18
Joined: 06 Apr 2016, 13:34
Has thanked: 4 times
Been thanked: 4 times

Post by Cigla tel. »

Frabbio wrote:HI, you should keep your wires as short as possible, especially the input wire and the wires that go to the pots.
I do not think short wires will help too much. Original device itself has too much noise. And as i think, original pedal don't use wires, it use PCB mounted pots. Why it does not help than?!?

Just listen:




Only that helps to reduce NOISE is to use good shielded wires for IN/OUT etc.

User avatar
Frabbio
Breadboard Brother
Information
Posts: 81
Joined: 27 Jul 2010, 13:25
Has thanked: 11 times
Been thanked: 97 times

Post by Frabbio »

The noise you can hear in the video mostly comes from the switching power supply.
Oscillation happens when there is some kind of signal feedback that goes back into the circuit, so you have to minimize interaction between different parts of the circuit.
High impedence lines are more sensible to external interference, so you have to shield especially the input to reduce this possibility. Keeping short wires on the pots is fundamental to reduce signal feedbacking into other parts of the circuit.
Obviously you have to pay attention to this when designing a layout, keeping a distance between sensible parts.
In my build i used pcb mounted pots but i didn't use shielded wires for in/out and i had no problems whatsoever

User avatar
Cigla tel.
Information
Posts: 18
Joined: 06 Apr 2016, 13:34
Has thanked: 4 times
Been thanked: 4 times

Post by Cigla tel. »

you think that the original pedal does not have a big amount of noise? That video shows the opposite and you claim that this comes from switching power supply not from pedal itself? Maybe but ...
Mate, YT is full of complaints about a HIGH NOISE that come from Friedman BE-OD. It cannot be that every user use bad power suply?!? There is one more video (2:30min):



Other pedals on test don's suffer from bad "switching power supply", only Friedman?!?
Judging by me, this is the pedal with the highest noise level on the market. Bad reputation for Friedman! :( BTW. only, if you reduce gain with the internal trimmer on1/4 turn, than pedal work great without annoying noise! :D

Post Reply