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Messages - aion

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Thanks. I'm going to try to find the parts for mine and verify as well. I'll update the BOM for the Balance control in the mean time.

Oh wow, thanks for catching that - yes, "D15" on the pot code definitely refers to audio taper.

I'll see if I still have the Sustain pot handy to check the code on that one since it's obscured by the pics. Did the taper seem to match better on the Sustain control or did it feel off as well?

Build Reports / Re: Aion Vector Delay
« on: July 14, 2019, 01:37:50 PM »
Thanks for giving them a shot and very glad to hear you liked them!

The design goal was to cut out all of the pain points of building pedals. Wiring was one of the biggest. The kits are easy enough for a beginner, not because they're over-simplified at all, but just because they eliminate some of the tediousness and the steep learning curve. And that means they're also a lot of fun for seasoned builders due to all the unique aspects & methodologies of the build.

...And of course there's the nefarious hidden motive: making it so enjoyable to build the kits that you have a hard time going back to the traditional way! ;)

General Questions / Re: Layouts and hardware
« on: June 23, 2019, 03:22:07 PM »
Some advice I saw in DIYSB is to not have PCB mounted parts on more than one plane.

100% agree with this - unless you've got a flawless CNC machine that's accurate within mils and some killer CAD skills to program it.

General Questions / Re: Layouts and hardware
« on: June 21, 2019, 12:32:31 PM »
I tend to mock things up in Illustrator (Inkscape may also work) - and in this situation I would create a side profile of each of the parts and see how they line up. Include all hardware like nuts & washers if they would impact the internal mounted height (for instance, a toggle switch is usually mounted with an inner nut and star washer).

You can set measurements to inches or mm and then create the shapes with the exact sizes from datasheets to make it accurate. I will also sometimes use calipers to measure a physical part if there is any doubt from the datasheet.

General Questions / Re: Transistor for a Phase 90 Clone
« on: June 21, 2019, 05:32:02 AM »
Not too low and not too high. 1-2V is usually where you want it. You can go higher but will need a different zener diode.

General Questions / Re: Transistor for a Phase 90 Clone
« on: June 20, 2019, 06:20:05 PM »
That sounds perfect to me - at the low end of the 5457's spec, so not as good for buffers/gain stages but perfect for phasers.

Just a few minutes ago. Smashed the record for most expensive guitar ever sold. Second place was the "Reach Out to Asia" tsunami relief Strat back in 2005 ($2.7 million).

Open Discussion / Re: Is the golden age over?
« on: June 20, 2019, 08:16:38 AM »
From a retail perceptive on the 'industry' i would actually disagree.  I cant talk about other stores, but I personally have never been busier.  Part of the reason im not on the forum as much these days, just trying to keep up with it all...

I agree, there are more pcb designers these days then 10 years ago, but i think thats more to do with the ease of fabrication and cheap cost to fabricate prototypes etc and accessibility more then anything.  Infact, it kind of confirms the hobby isnt slowing down.

Lastly, i recall seeing a thread on another forum, approximately 10 years ago, also announcing the end of the golden age (he used the same term).  But, we're still here :D

Just my 2 cents.

Same boat here. I've grown about 40-50% each of the past couple of years and am almost to the point where I can do this full time - which means the floodgates will open for tons more interesting & complex projects. I've never been more excited to be doing this.

It could just be more that the demographics are changing - perhaps people are using Facebook and Instagram more than DIY-specific forums like this one. And today there is much better documentation for DIY projects than 10 years ago when you may have had little more than a veroboard layout to go off of.

So perhaps beginners have fewer questions, I don't know. But most of the time beginners will end up on forums trying to get a question answered - and then they'll get hooked and stay for the community. Fewer questions = less community.

General Questions / Re: Transistor for a Phase 90 Clone
« on: June 20, 2019, 08:11:37 AM »
JFETs don't play by the rules of other types of components. The manufacturing process is wildly inexact, so they basically just make a batch of JFETs according to a certain process and then label them with part numbers according to their performance.

So 5952s have a VGS(off) range of -1.3V to -3.5V. Typically for a Phase 90 you want it to be in the -1.5V to -2V range.

5457s have a Vgs(off) range of -0.5V to -6V. This means that the entire range of a 5952 will fit inside the range of a 5457.

This is speaking very roughly since there are some other differences between 5457's and 5952's such as the IDSS range. But when used in the Phase 90 we typically only match based on Vgs(off) so other specs are less of an issue.

Long story short - a quad of 5457s and 5952s with the same Vgs(off) value should behave identically. With JFETs, the part number is a lot less rigid than with other types of components and the actual specs of the individual device are the most important thing.

So generally speaking, a batch of 5457s is less likely to render good matches for the Phase 90 since the ideal P90 spec is on the low end of its range. But, it's definitely possible - and no, in this case 5952's wouldn't necessarily be an upgrade.

General Questions / Re: Soft Switching
« on: June 11, 2019, 08:30:56 AM »
You got anything exciting coming out this year dude?

Lots! New baby in a couple days (you didn't say effect-related :) ), new kits in a few weeks, new website in a few months, and at least 10 brand new circuits - original traces - before the end of the year along with a bunch more less-original releases.

My activity schedule goes in waves... there was a ton of stuff from January through March, then it's been quieter the past few months while preparing for a noisier back half of the year. But 2019 is just getting started!

General Questions / Re: Soft Switching
« on: June 10, 2019, 10:06:45 AM »
I've attempted several versions of non-microcontroller relay switching and they all have issues that made them unsuitable for use in my opinion.

The main issue is that the relay needs as short of a pulse as possible (usually 6-10ms) - enough to trigger the relay and no more. If the pulse is too long then the relay coils introduce switch pop on the contacts.

Only a microcontroller can give you an extremely short and predictable amount of pulse, so that's why all commercial implementations of relay bypass use one. It's of course much simpler to use a CMOS setup if you can (no programming needed, and it's cheaper, especially in manufacturing) but it just doesn't cut it.

Here are some of my adventures from a couple years ago:

Open Discussion / Re: Your suggestions on overdrives for mbp
« on: June 05, 2019, 10:07:48 AM »
The Ibanez CR-5 Crunchy Rhythm. The schematic:
As far as I can tell, nobody has made a pcb for this, and it's one of the most underrated overdrive pedals ever made. It's not another Tube Screamer, Klon, DOD 250; so that in itself is a breath of fresh air.

I've got one of these coming... the proto board is here, just need some time to build it & write the docs!

Build Reports / Re: Aion Cerulean | Blues Breaker
« on: April 20, 2019, 03:45:54 PM »
Love it! The graphics are a great touch.

Which clipping settings do you prefer?

General Questions / Re: LED padsí convention
« on: April 18, 2019, 08:19:09 AM »
Potentially useful data for other PCB designers:

For 5 years, my Eagle library had square pad for anode - so the same as a polarized capacitor, long leg goes to square.

Last year when I went through and updated all my libraries, I changed the convention to square pad for cathode since as BuGG said, it's a diode and should follow that convention. Also, square and flat go together, so there's the mental hook there.

Since switching to square-cathode, I have had 4-5 people who emailed me saying the LED wasn't working, and in each case they had installed the LED backwards. In the 5 years previous, using square-anode, not one single person ever emailed me with that issue (nor anyone in the past year who was using older boards). In both cases, the silkscreen was also printed showing the flat side to help with orientation, so that wasn't a factor in either configuration. And they were mostly experienced builders, these weren't their first builds.

People who always follow the silkscreen will always be correct regardless of which pad is which shape. But based on my experience, among people who do not pay attention to the silkscreen, there are more people who instinctively put the longer leg to the square pad than people who would note that it's a diode and would instinctively put the shorter leg to the square pad.

So, given this, I switched back to the square-anode convention a few months ago and will be using it on all designs going forward. I think it will almost entirely eliminate the issue of people installing the LEDs backwards.

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