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Messages - mjg

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Open Discussion / Re: Finally leveled up.
« on: March 18, 2023, 03:49:45 PM »
Nice work Jimi!

Open Discussion / Re: When you have a teenage daughter.
« on: January 27, 2023, 12:32:18 AM »
My current trigger is the empty icy pole packets and soft drink bottles littering my kid’s bedroom floor.   The bin is … right … there…

Open Discussion / Re: Cusack's production facility
« on: January 08, 2023, 02:52:40 PM »
I was amazed at the size…how many pedals do you produce per year?

Open Discussion / Re: Merry Christmas I hope you all are warm and safe.
« on: December 25, 2022, 03:33:28 PM »
Those waffles are excellent.  😁

Happy Xmas, I’ll send warm thoughts to all in the northern hemisphere.  It’s fricken hot here. 

General Questions / Re: mitigating noise via ground plane isolation
« on: October 30, 2022, 03:04:38 PM »
 Yeah, that screenshot looks good.  Worth a try anyway!

For the cap on pin 5, given that’s to keep the output negative voltage steady, it probably wouldn’t hurt to put a 100u and a 1u in parallel. Looks like you’d have room to fit both on your layout. 

Anyway, just another hack here, but hopefully this helps :D

General Questions / Re: mitigating noise via ground plane isolation
« on: October 29, 2022, 03:37:35 PM »
An approach I’ve seen is to not put any ground plane underneath the charge pump.  Keep that area of the board completely clear. 

You could also try the LT1054 instead of the 7660, but beware the difference on pin 1.

Not sure if it will help, but if you’re willing to try out ideas put them on the list?

Build Reports / Re: The J.Scott Special
« on: October 29, 2022, 12:39:48 AM »
Cool.  It took me a while to work out what the MBP “Mad Bean Pedals” knobs did.  Got there eventually.  ;D

Hopefully it continues to improve for you.  They really can do amazing stuff with spinal surgery these days.  Best wishes for the recovery.

General Questions / Re: Dirtbaby blend question
« on: October 18, 2022, 02:25:17 PM »
Not sure that the buffers would help, but worth a try.

I think the reason you are going to get some signal is that the blend pot is 10k, so at most you are adding a 10k resistor in the signal path.

First thing that popped into my head, If you really want to kill the signal from one or the other, maybe expose T1 which will let you completely turn down the wet, and do a similar pot to ground for the dry signal, which would let you completely turn down the dry…and sum those together with an op amp.  It means you have an extra control to fiddle with, but it would definitely let you control the mix all the way to silence from either side.

General Questions / Re: Schematic questions
« on: October 13, 2022, 03:03:58 PM »
Lol, yeah, don’t use a potato, we saw how that turned out in Portal. 

Sure, I totally agree, it’s good to know what these things signify.  Just offering an alternative ‘quick start’ if you want to just follow the schematic by numbers. 

Open Discussion / Re: What should I do?
« on: October 13, 2022, 03:00:07 PM »
If it’s the pcb layout and soldering, etc, that you enjoy, maybe there is another area of diy electronics that you can dive into for a while, rather than more pedals?  Bonus points if your wife had a hobby that you can create a pcb for her to help with some part of it. 

Or…get into eurorack synth.  There’s plenty of scope for endless building of modules, and they don’t look like they take up so much room once they are all slotted into a rack 😅

General Questions / Re: Schematic questions
« on: October 12, 2022, 02:40:28 PM »
Another way to look at is that you just need to join up all the things with the same label.  It could be called “banana” instead of “VA” and it would do the same thing electrically.   ;)   

As Mauman explained, there are all sorts of conventions for what these things mean usually…but when it comes down to it, they’re labels. 

Open Discussion / Midnight Oil concert (attempt 2)
« on: October 01, 2022, 05:11:58 PM »
A few months back I went to a Midnight Oil concert, but it got cancelled before the band started due to extreme weather.

Last night they were back in town to make up for it.  It has been raining all week here, and was up til about an hour before the band came on, but then we had a lovely clear night for the gig.

It was a good show!  They can still rock.  Peter Garrett dancing moves never fail to impress, even if he’s almost 70.

I reckon the average age of the audience was about 45.  There was an elderly lady on a walker frame that set up in front of me, I kid you not.  She knew all the songs and had a great time. 

Some interesting moments where the lead guitarist sat down and did a jazz piano solo for about 3 minutes in the middle of a song…and they had a saxophone accompany on some songs.  Pete had some good rants between songs about Putin, King Charles, and politics in general. 

Anyway, it was a good night out and I’m glad I got to see them one last time.

We caught the support band “King Stingray” as well, they were good too.

Open Discussion / Re: PCB fab options…
« on: September 30, 2022, 05:53:21 PM »
I use Elecrow, which is pretty much the same deal as the other ones you mention.  I think they make their profit by doing things in bulk - it’s not just your board that they are producing, they will be doing a heap at once.  Elecrow also makes their own products, sells components, etc.  so I guess the PCB making is just part of their business.

I looked into getting some made here in Australia, and much the same as OSHPark, the prices are much higher locally. 

Not sure if that helps!

Build Reports / Re: Blues Crusher (diyguitarpedals pcb)
« on: September 24, 2022, 04:03:39 PM »
Nice.  The UV prints really do look classy.

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