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Old 7th June 2010, 01:02 AM   #2021
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IMO it would be advisable to rethink the changes and make the design simply better than the previous versions for its specific purposes:

I am not talking to bend the variations in favor of my personal favorite Mezmerize but maybe the focus could be sharper:

- A combined (scorable) mezmerize/hypnotize optimized version 2.0 with some more possibilities as 4 caps, TO220 diodes etc. for those that want the buffer part the best possible way and for those that like the input selection with relays too. So one board with scorable part concerning the input selection/volume control.

- A separate universal shunt supply PCB for those that won't use the buffer part anyway. Wider tracks for larger currents, more space for larger resistors that come with more current etc. To me it seems that will be the primary purpose for this particular board anyway but I could be wrong on that of course.
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Last edited by jean-paul; 7th June 2010 at 01:25 AM.
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Old 7th June 2010, 01:09 AM   #2022
Salas is offline Salas  Greece
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Quote:
Originally Posted by jean-paul View Post
Hi, things have changed but the AC wiring crossing the TO220 diodes is not pretty. That Phoenix connector should have moved to the side long ago. Still 2 jumpers and a narrow spot for the ground tracks ( too picky, I know ).

Just a thought: when all MOSFETs are brought to one side mounting them will be more easy on a heatsink or cabinet/case. It will leave possibilities for the AC wiring too. In my eyes the layout is somewhat less optimal/tidy than before, I am sorry to say so. Or at least I don't see many advantages over the old boards except for the caps and the TO220 diodes. I won't start about the color of the board ...

Maybe the marketing department should have advised to design just a general purpose shunt supply board from xx mA to xx A without the buffer part Omitting the buffer part, putting all MOSFETs to one side and using a 6 pin Phoenix ( 2 x +, 2 x - and 2 x GND ) at the power output for feeding more than 1 circuit certainly would be nice additions. The board would then be a truly versatile shunt supply PCB.
Its all CRT could muster. It has the TO-220 diodes, the 10mm double snap in caps, takes big current Rset resistors, and caters for any type/value Vref cap. So it takes all the proven mods.
About the parts side color maybe they can do a mask strong blue also. They did not do more in the proto phase. If not, we will see options. Its 3 times heavier copper and plated holes and takes parts OK non the less.
Using it for universal supply only its a whole different thing. Would need Norton references to give a whole range with trimmers and remote sensing for addressing longer distances well.
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Old 7th June 2010, 01:12 AM   #2023
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AFAIK the current Hypnotize is used by some people for just the supply part without all the bells and whistles (like Norton references to give a whole range with trimmers and remote sensing for addressing longer distances). There is also a thread about using the supply part for other voltages/currents isn't it ?

Do not take my words too seriously as I don't mean to spoil the party. IMO a new version shouldn't have the same minor things that the old one had.
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Old 7th June 2010, 01:17 AM   #2024
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I haven't seen too many in its using it as a supply only thread. Currently only 21 want a stock Mez as well. A Hypno becomes a Mez with just a classic switch and extension rod non the less.
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Old 7th June 2010, 01:21 AM   #2025
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Ha ha, I like your reasoning Salas. When I put an engine on my bicycle it will be a motorcycle too

Seriously,a classic switch doesn't make a Hypnotize a Mezmerize as switching with relays is superior to a mechanical switch with less crosstalk but this is going off topic...

I won't interfere anymore but I thought it could be good to point out to maintain a sharp focus on the project.
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Old 7th June 2010, 01:24 AM   #2026
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As for supply only, if this one will succeed, we are talking 3 generations ahead. And I mean to succeed as a board. Because it works point to point for enough people already and the feedback on resolution and tone is awesome.
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Old 7th June 2010, 01:31 AM   #2027
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Part of the reason for the new boards is lack of stock

There is no soldermask on the top of the proto board, purely a vendor mishap. I kind of like the matte look myself. Production units will look like the bottom of the board.

IMO, Mesmerize should
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Old 7th June 2010, 01:32 AM   #2028
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Quote:
Originally Posted by Salas View Post
As for supply only, if this one will succeed, we are talking 3 generations ahead. And I mean to succeed as a board. Because it works point to point for enough people already and the feedback on resolution and tone is awesome.
I am glad you point this out as many will want to wait for this version as a general purpose shunt supply (that suddenly exists). You see, communication is important !

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IMO, Mesmerize should
Why ? It still is a good design that can be built much more tidy than most Hypnotize versions I've seen. Allow me to think you probably make a small thinking error by thinking that more demand for the simple version says that the Mez is less popular. As said before, I know that people buy Hypnotize boards to use them just for the supply part which could very well explain the higher demand.... Most people that just wanted a complete buffer have bought their Mez PCB's and made them and enjoy them. They won't buy a second version contrary to people that use the Hyp board for more than one purpose/device.

And what is the fuss about the color ? Does it sound better in blue ? I feel more for tracks that don't come off easily instead of debating about the color of the tracks.
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Old 7th June 2010, 01:41 AM   #2029
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If there is need for more Mez, people can sign up. If it breaks 100 mark we can ask for a production run of the classic Mez in heavy copper, plated holes, red color.
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Old 7th June 2010, 01:43 AM   #2030
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Quote:
Originally Posted by jean-paul View Post
And what is the fuss about the color ? Does it sound better in blue ?
Definitely maybe.
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