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Now I think I know the answer to my own question but worth asking a second opinion.

Ok so failing

1 - it being a positive ground effect (which is NOT the case)
and
2 - a short circuit or solder bridge (which there MAY be)

is there any other reason (Im thinking things like a failed cap, or something random like that) which would cause a ground plane on a PCB to register something more than 0v when run with a battery.

Im seeing similar readings to my battery voltage on a home etched Zombie Chorus board.

The effect passes signal, just. When I unclip the ground, the signal passes wierdly.
With battery, and grounds wired up, I have to really crank my amp to hear anything and what I do hear is a very fuzzed out signal, but something.

Im hoping I havent fried my Mn3007

Anyone confirm its just likely a solder bridge that'd help my peace of mind, but im damned if I can see one.

Recommend both these pedals!
PorkBarrel v2 with vibrato and deep switches, mn3007





GreenBean with a nice little idea if I do say so myself of adding the Fat and Bright on DIP (on vero).
Nice array of classic tones. All diodes 1n1418 for now. Got some 1n60, 1n34a and other silicons to try when i get time. Tone = B20K
On/Off/On clip switch. so far I really like the no diodes option (!)






Next on the list is an FSB Aqua Puss v1 MN3005
Got this board rocked, need to box (and tune the trimmers)

Then the Dirtbag (v3205 ) and Currentlover (Mn3007)!

Hi

Would it be possible to sub a Philips SA571 in place of the suggested NE570.
I am planning to use v3205 BBDs

Thanks!

My first forays into etching PCB

Worked great first time in all cases. Also done a Brown Source but not decaled yet.


First up, the Deep Blue Delay (Madbean Sea Urchin)





The Light Wah, devised by Dead Astronaut on diysb





And lastly a GGG Dod 440. A friend bought the kit and his friend then borked the build, so I gutted and redid the board etc.
Sounds pretty neat!

Hi,

Is it possible to do the blinking light LED trick from the PB v3 build doc on the v2 pedal?

thanks.

Built these, one for me, one for my bass player
Graphic will be familiar for fans of Rage Comics.

I did the recommended C10 = 1nf, C12 omitted after trying a few variations.
Also definitely use 2n5457s over the 2SK30s, tracking was day and night for me.

Thanks for a super board from Madbean. These designs with onboard pots are the way forward.





Sound really good too.
Definitely recommend this project.

Can anyone recommend a economical (im thinking definitely sub £100 for mono) laser printer that can be used reliably for toner transfer and etching at home type projects.
Also, what else would I need besides ferric chloride, and copper clad board?

Do you have to use that blue transfer paper, is it better, or is just magazine paper the best? Ive done some reading, but maybe not enough.
I have £50 in amazon vouchers in the uk, so a printer that is stocked there is my preference.

Thanks so much.
Ls

HI

whats the best sub for a 24k resistor
I have 22k or 27k

Or is it imperitive to have the correct value?
I could do 2 x 12k in series but it looks trashy...

Thanks!

Any way to get a bit more speed outta the rate knob on the pork barrel?
Sounds cool but want faster !

Something with a swtichable resistor mod would be ideal I reckon...

Hi,

Banzai messed up my order.
I have 8 x B100K peices for the sequencer board, but they send B250k potentiometers for the filter and speed. Would using these cause big problems? Or should I wait for potential replacements...

Banzai is really getting on my nerves with mistakes in orders!

Thanks

Finished mine today, minus the decals for the case.
Sounds excellent, but there is a bit of bleed thru of the octave fuzz mode into bypass. No bleed of the ring mod. Not sure how to get rid of that, but honestly, I dont think I am too bothered.

Here are some pre-finishing touches pics...

Hi

Anyone have any ideas how easy it would be to make the Dig Dug trem rather than wah? Like the seek trem / tremorama?

Thanks

Did this for a mate. I made my own Fuzz Factory a few months back on vero.
This was soooo easy in comparison.

Thanks Madbean. Your boards are fantastic.


Plain jane for now - see what my mate wants as a decal

Insides - pretty neat if I say so myself!

Finished this one up. Was a bit of a pain, had to fix a connection or two.

Deliberately sanded the paint off the top before adding decal to add to the industrial vibe.







sounds pretty horrid in a good way

HI,

I recently built up the Macheen PCB, today in fact.
I tested the circuit outside of boxing up, by connecting up with crocodile clips the in out 9v and ground.
Everything worked fine, so I proceeded to box up. Lo and behold, now boxed up there is an issue.
The effect passes clean fine, when engaged, its SUPER low output, even with every control dimed.
I can hear the fuzz effect, but its way way way too low, way lower than when I tested without the switching in place.

Ok you say, you effed up the switching.
Uh uh. I unsoldered everything, hooked the ins out and powers up like before, and same scenario.
Now the only issue I had when testing was before I soldered the power leads in to the power supply connect, I decided to test with the battery again (I use a battery snap and crocodile clips).
Somehow I managed to touch them together. This is the only issue I see.

I dont see how that will have damaged the effect, but I wanted to point it out. Ive tried to test briefly the other connections and all pots and everything feels secure.

I cant see it being a grounding issue either.


anyone experienced something similar?

HELP!

Ive made a number of Vzex style pedals on vero, this was my first PCB. For the price Brian charges, its silly not to.

Here are the pics!





And its documented in more detail on my blog.
http://hownotomakeapedal.blogspot.com/2011/07/first-madbean-build.html

Excellent build documents with these products, thanks Brian.

Ian (UK)

Dear all

How vital is the 8n2 capacitors for this build? They seem impossible to source for me in the UK.
Likewise, the 12nF.
Could these be swapped for 10nF and 15nF respectively without issues?
Also, for the pF values, do you recommend WIMA caps, or will ceramic ones do fine?

Thanks

LS