Bring out yer Diptrace
- Thread starter Grubb
- Start date
Grubb
Well-known member
Do you have a strategy for PCBs with LFOs out of interest? If you are willing to share? No worries if not.
pingpongcomputer
Well-known member
Thanks! It's a jfet preamp into a Si FF output stage using low gain soviet transistors with a foot-switchable dirty boost in front. Toggles are for the coupling cap into the FF stage and a low pass on the output. Waiting on enclosures to arrive from Tayda them I'm going to send some out to a group of testers and start selling them if the response is good, otherwise back to the drawing board.
szukalski
Well-known member
I haven't got experience in it, but I saw some comments from old hands over at FSB talking about isolating the LFO in one part of the board and using a separate ground plane, only joining where the negative input comes into the board.
tips to reduce tremolo LFO click noise?
tips to reduce tremolo LFO click noise?
www.diystompboxes.com
Grubb
Well-known member
Amazing, thanks. Your ground plane shaping there is blowing my mind, I'm still relying on "snap to board outline" 
I haven't needed to do any separations of ground planes yet, but I'm working on an Ultravibe and a modded Phase 90 that I'm guessing will need more careful planning.
In the meantime, here's a reasonably symmetrical true bypass Klone:
The second part of my Mayer-inspired Christmas gift for my daughter. It's heavily based on the Merman/Sea Monk. I used my symmetry cheats to note the board design's month and year.
I haven't needed to do any separations of ground planes yet, but I'm working on an Ultravibe and a modded Phase 90 that I'm guessing will need more careful planning.In the meantime, here's a reasonably symmetrical true bypass Klone:
The second part of my Mayer-inspired Christmas gift for my daughter. It's heavily based on the Merman/Sea Monk. I used my symmetry cheats to note the board design's month and year.
Brett
Well-known member
You layout work is always tops, @Robert! I looks like you're connecting power and ground to the audio portion of the circuit on the backside of the board. If you're willing to share (and I understand if you aren't), are you also isolating the copper pour on the back of the board like you did on the front? How did you handle joining the ground and power planes?
Brett
Well-known member
Your symmetry is ridiculous... in the best kind of way
. Nicely done.
Robert
Reverse Engineer
Oh absolutely, there's no top secret proprietary information here.
The ground plane is split on the back similar to the front, except the split doesn't go all the way to the edge on one side so it creates a thin trace running up to the top of the PCB.
The Double Pendulum is isolated as well but instead of splitting the PCB in half I just fenced off the LFO section, including the blinking indicator LEDs.
finebyfine
Well-known member
Just wanted to reiterate my endless gratitude for all of this thread especially with these most recent examples of ground plane splitting @Robert ,which is something I’ve been meaning to learn. This thread is exactly what I wish I had found when looking for RG Keen’s out of print pedal pcb layout book years ago and is the only reason I’ve been able to make the dumb amount of pcbs I’ve made.
Grubb
Well-known member
Agreed. I also appreciate that this is a learning community and people share what they've learned with others.
I've gone from sweating profusely while fumbling my way through soldering my very first LGSM to whipping up my own PCBs, and that doesn't happen without the kindness of people on here.
PedalBuilder
Well-known member
I have no idea what this is, but the layout is beyond cool, so put me down for one. If it’s a ring modulator or YATS, so be it.
Feral Feline
Well-known member
Well, to me it looks like a box of melted Crayons with all the colours blending together.
Put me down for one, too.
Put me down for one, too.
Brett
Well-known member
Looks like you're planning a control layout similar to your Kliché Mini/NOTAKLICHÉ boards. It looks to be something different though (I only see one TL072). Either way, there are a lot of components there, it's going to be "fun" routing that one.
Robert
Reverse Engineer
Man I'm just going to hit auto-route and close my eyes....
... If only it were that easy.
Yep, the NOTAKLICHÉ layout was a perfect fit for this one.
Hmm, maybe we should refer to it from this point forward as the Pastel Preamp?... just to be on the safe side.
Nice guess by the way.
benny_profane
Well-known member
Don’t you Georgians call them ‘crans’?
Robert
Reverse Engineer
You aren't wrong... although it sounds a bit more like "crayens"...
I think just plain colors (as in "go gitcher colors") or colorin' crayens is what I've heard most around these parts.
