F5X -- the EUVL Approach

[EUVL]

One more press of the push button will turn it to the operating state, with all relays on (to release input - red LED bottom right, connect output - red LED right lower). The operating state is indicated by the blue LED.

Another push of the push button will return it to start-up state.

Later on, the red/blue LED on the front panel will be replace by one bi-colour LED.

Also in the new PCB layout, the user has the choice to connect whichever relay to whichever operating state freely by jumpers.

The output DC protection (trigger at 2V, any of the two channels) is of course also tested functional.
But since it turns everything off, there is no picture to show.





Patrick

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[EUVL]

Oh, BTW, all normal 5V logic.
No uP's, no MHz oscillators, etc.

The original DC detection circuit used 2SJ109's.
(This circuit has been around for 5 years now.)
I thought it would be a bit extravagant these days, so I changed them to BC560C's.




Patrick

[qusp]

Originally Posted by EUVL

Oh, BTW, all normal 5V logic.
No uP's, no MHz oscillators, etc.

The original DC detection circuit used 2SJ109's.
(This circuit has been around for 5 years now.)
I thought it would be a bit extravagant these days, so I changed them to BC560C's.




Patrick

wise choice haha j109 for protection only is indeed extravagant, i have maybe 20 x j109 sitting here for special occasions, but i have a large bag of each 550 and 560 ready to throw at anything that moves. all looks and appears to work great Patrick. good work team!!

[EUVL]

> wise choice haha j109 for protection only is indeed extravagant

If you curve trace all your 109s, you will find about 30% to be not very well matched. (see attached)
Still in spec (3% Idss), bit otherwise poor match.
And only another 30% is matched to say 0.5% over range.

So the rejects go to protection boards.
But it's only for people who has 100's, like Jacco.

> good work team!

This is just a quick & dirty test board from me to keep Mark going on the proto while waiting for Alexis' much more professional layout.


Patrick

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[EUVL]

I just did some thermal simulations for various mini-tower mono-block configurations here :

Finished F5


Patrick

[qusp]

i realize it isnt the final layout/board and just one of your 'quick and dirty' layouts, but its a good proof of concept and if the final board is even better; which no doubt it will be, then i say good work team

[EUVL]

Another short update.
I did not feel like posting over the weekend, as I have friends in Japan.

We paid for the GB MOSFETs at least 2 weeks ago, and are still waiting for Zhoufang to have time to ship.
I just sent him a PM over the weekend. No replies as yet, but he is busy these days AFAIK.

We also have all the parts of the case. They fit together without problems.
After the forum has confirmed how (if) they want to be involved, we shall post some first pictures.

The PCB guys are still busy, so no progress that I can report there, as yet.


I can only ask for your patience,
Patrick

[johnwmclean]

Thanks Patrick!

Can’t wait to see the case, I’ll try to be patient as best I can.

[fitzfish]

Originally Posted by qusp

it has come to my attention that my post above if taken seriously could be taken the wrong way. my post

was more me thumbing my nose at the sometimes deserving attitude that seems to be going around lately. it was not meant to be taken seriously thus the smiley, as i know others like myself have their own lives they must get on with. so Dave if you read it like this my apologies, i was not being serious, but i guess its still a bit raw for some people at the moment.

all sorted thanks to pchw anyway, so as you were

Hi qusp,

No offence taken at all. My apologies for not responding.

Personal reasons have taken me away for a while but I am back finishing the final touches to the layout and look forward to everyone's involvement.

Originally Posted by alazira

Hi qusp,
I too have not heard from fitzfish.

Hi alazria,

Likewise my apologies for not responding. I hope all of your questions have been answered.

Best regards,
Dave

[EUVL]

Dave,

Welcome back. I know it's been difficult for you.

Likewise my thoughts are with friends in Japan right now.
Please excuse me for not posting for a while.


Patrick