Bugcrusher 9v board layout

[para]

i finally finished a board layout for the 9V-bipolar version of Bugbrands bugcrusher. found here





direct link: http://la-ac.com/para/images/Bugcrusher-9v.gif


i did build a prototype board of a slightly different layout then this. this is the second version. i have yet to actually build this version but it has all the fixes from the first.


if i did miss something please let me know so i can get it corrected.


steven

[para]

Tom just pointed something out. c2 should be 22pf which should get rid of what’s left of the bleed and then c1 can be changed to 4n7 for a little better high freq control, the second one is probably a better option for the guitarists but the noise kids may want to go a little bigger. it will get you a slower clock speed at full crush

thanks again Tom for double checking my work. and i’ll get the image updated when i get the chance.



steven

[dach]

Thanks for taking the time to lay this out, I'll have a go at it in a week or two when I get my hands on the parts

[z1]

thanks! just what i was looking for

[danoisefactory]

Para, great layout, thanks.

Seems to easy to build now, that i can't resist...

Question, in this layout there are two battery's used.

Could it be powered by a usual 9Volts adapter, by daisy chaining it i.e. give it two 9V connectors, use a daisychain like when you use one adaper with more effects?

Wow, ok try to ask in simple way:

Could, and if so, how could i make the bugcrusher 9V work, when i would want to power it with a 9VDC adapter?


greetz.

[para]

no but you could use two 9v adaptors directly in place of the batteries. ugly but it will work.




or you could add this to it and use a 12vAC or 15vAC supply. notice that says AC. if you use a 12vac you will need to change out the 7812 and 7912 for a 7809 and 7909 to get 9v out but you should not use a 12vac and use the 7812 and 7812 that will not work and might cause damage. maybe?

i learned all about this way of doing it by asking mr. Bugs himself about it in the main bugcrusher post http://experimentalistsanonymous.com/bo ... .php?t=566

[danoisefactory]

Ok, so two separate will work, I guess they should both be solely used voor the crusher. Mmm, bit clumsy.

Or adapter with 12 or 15 VAC.
I'll go for that and try to hunt down an AC one.

Thanks for the info!

I did find this, would this work?
http://www.geofex.com/circuits/+9_to_-9.htm

I'm also thinking that i maybe i'll first build one with the use of two batteries, çause it looks easier then all the extra's that i'll have to do when trying to get t fed with a 9V(DC or AC) adapter.
Another thought, if i'd use an 18VDC and split that into two 9 VDC's would that work?

Sorry for the trouble, but my pedalboard is mostly 9Volts and there's not that much room for separate adapters and also 9VDC batteries just cost way to much money to have them drain because of a permanent fixture on a pedalboard.

[para]

i completely understand its just that the bugcrusher was designed to be a module for a synth originally and the 781 requires a bipolar supply

yeah there this thread http://experimentalistsanonymous.com/bo ... c&start=45  where i think cloudscapes said he is going to try it out and see if the single 9v will work with the 1044. maybe use the 2 battery setup for now and then wait for his results.

maybe if you let him know your also interested in his findings he'll remember to post them?

[danoisefactory]

Yes,

Great tip

I agree, first just build the two battery thing, I can use that one at home. Bugcrush my synth...

 And I'll look into that other thread.

Thanks a lot, you're great help!

[cloudscapes]

I'll remember.
I'm eagerly awaiting the chips and if it works it will be a great day!

[pomegranate]

Hey guys,

  I picked an empty crybaby shell.  I think I want to build a bugcrusher into it.  However, I do not know where to buy a AD781 and 40106N.  Also, the biggest wah pot I found is only 200k.  Is there a way to get the same range as a 1M from the 200k?

::jason::

[goodrevdoc]

I did find this, would this work?
http://www.geofex.com/circuits/+9_to_-9.htm

I tried it like this and my 1044's got HOT!!! Also i got really blatty audio and just a faint frequency sweep with pot rotation. Didn't have two 9V's at the time and the circuit didn't survive that long on my breadboard so I've yet to hear this thing.[/quote]

[expanoncolin]

Hey guys,

  I picked an empty crybaby shell.  I think I want to build a bugcrusher into it.  However, I do not know where to buy a AD781 and 40106N.  Also, the biggest wah pot I found is only 200k.  Is there a way to get the same range as a 1M from the 200k?

::jason::

You can via optoisolators... IE coupled photocells (with a large range) and LEDs, or an H11F3.  Just use the pot as a voltage control source, buffered by an op amp, fed into the LED.

You can also use just about any pot in a wah...  it is just a matter of some looking around.  IE, are all of the wah pots just pots with some kind of "knob" on them with a bunch of teeth as a gear?  Then just put the "knob" on a new pot.  Or, many wah pedals work by tightening a screw onto the knob, which is attached to a mechanism that turns the pot.  Just loosen the screw and put in the new pot.

-Colin

[pomegranate]

Hey guys,

  I picked an empty crybaby shell.  I think I want to build a bugcrusher into it.  However, I do not know where to buy a AD781 and 40106N.  Also, the biggest wah pot I found is only 200k.  Is there a way to get the same range as a 1M from the 200k?

::jason::

You can via optoisolators... IE coupled photocells (with a large range) and LEDs, or an H11F3.  Just use the pot as a voltage control source, buffered by an op amp, fed into the LED.

You can also use just about any pot in a wah...  it is just a matter of some looking around.  IE, are all of the wah pots just pots with some kind of "knob" on them with a bunch of teeth as a gear?  Then just put the "knob" on a new pot.  Or, many wah pedals work by tightening a screw onto the knob, which is attached to a mechanism that turns the pot.  Just loosen the screw and put in the new pot.

-Colin

The optoisolator is a little more complex then what I want to do.  I liked this circuit because it was simple, I was planning on etching a pcb for it.  I know small bear sells the wah gears.  Maybe I'll email them and see if they will fit a standard pot.  

Also, CAN SOMEONE TELL WHERE I CAN GET A AD781 and 40106N!

[cloudscapes]

Also, CAN SOMEONE TELL WHERE I CAN GET A AD781 and 40106N!
You can even get two of each as free samples, no catches.