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Author Topic: 6Mhz and more... (Read 21477 times)

Online pear

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Re: 6Mhz and more...
« Reply #165 on: 2018.January.07. 10:05:13 »
And we sew a PCB ...
Autorouter sews ugly connections.
I prefer to do it manually.
Such a small work of art ;)

The last moment for attention.
Although there is not much space left.

Online pear

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Re: 6Mhz and more...
« Reply #166 on: 2018.January.15. 20:24:04 »
Currently 85% of traces ready.
I have calculated the approximate cost of the card in the full version with all features (including L-connector).
Not to little, about 120 EUR, but most of all I'm doing this project for myself and decided not to save.
Ultimately, the "dream" name obliges ;)

The LED on the visualization is next to the board.
On the real card will be mounted from the bottom of the PCB, and then the legs will be bent up.
The RGB LED should be almost exactly where now is the red LED on the EP board.
« Last Edit: 2018.January.15. 20:28:29 by pear »

Online gflorez

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Re: 6Mhz and more...
« Reply #167 on: 2018.January.16. 02:54:19 »
Ok then, but just only to know, what can be optional in your project...?

Online pear

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Re: 6Mhz and more...
« Reply #168 on: 2018.January.16. 06:49:35 »
The minimum option:
- not has own DCDC power supply from 9 to 5 V,
- only 1 MB RAM,
- manual (potentiometer), with a smaller range (no negative bias voltage), one-time adjustment of the contrast of the LCD display , instead of the program setting,
- RTC chip DS12887 with no "clear NVRAM" function and replaceable battery,
- no beeper,
- no temperature sensor,
- cheaper LCD display.

That gives you 40 EUR savings.
There is still not to little, 80 EUR. The rest must stay.
Completely removing the LCD screen will not save you money (5 EUR) and will make difficult to use the card.
You can also opt out of the RGB LED and LCD backlight (another 5 EUR).
« Last Edit: 2018.January.16. 07:29:51 by pear »

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Re: 6Mhz and more...
« Reply #169 on: 2018.January.16. 09:54:37 »
I think the 120 euro is not much!
Because this card has a lot of features!

If you can order it, I would like to order 2 pieces :D

Online pear

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Re: 6Mhz and more...
« Reply #170 on: 2018.January.16. 10:12:21 »
There is still a long way to order.
I need to write the firmware before :)

Online gflorez

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Re: 6Mhz and more...
« Reply #171 on: 2018.January.16. 10:24:01 »
I don't want the cut-down project, I prefer it build with all options even if I don't use some of them.

But maybe somebody doesn't need to overclock, already has a RTC chip or don't like it with sound. Also some other couldn't reach the complete price.

It is good to know it is a tailored project.

Online gflorez

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Re: 6Mhz and more...
« Reply #172 on: 2018.January.16. 10:29:45 »
What do you mean with 'no "clear NVRAM" function'?, because I already have some spare DS12887(battery inside) chips.

Online pear

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Re: 6Mhz and more...
« Reply #173 on: 2018.January.16. 10:31:26 »
It is good to know it is a tailored project.
I come from a country where, like in Hungary, every coin is viewed several times before spend ;)

The "clear NVRAM" input is not available in DS12887 (pin 21 does not physically exist), but it is in DS12885.
« Last Edit: 2018.January.16. 11:11:10 by pear »

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Re: 6Mhz and more...
« Reply #174 on: 2018.January.16. 11:14:38 »
I come from a country where, like in Hungary, every coin is viewed several times before spend ;)

In Spain the money grow in the trees and we tie our dogs with sausages....

------

Is the "clear NVRAM" input important for your project?

Online pear

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Re: 6Mhz and more...
« Reply #175 on: 2018.January.16. 11:19:10 »
:smt043

No, the "clear NVRAM" option will be available also from card menu (exactly one of the microcontroller function will be clear the NVRAM content).

Online pear

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Re: 6Mhz and more...
« Reply #176 on: 2018.January.17. 06:29:16 »
Last night I've finished routing the paths :smt015
Today I will make some minor corrections and I'll send the PCB project for production :ds_icon_cheesygrin:

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Re: 6Mhz and more...
« Reply #177 on: 2018.January.17. 08:49:43 »
Great news :)

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Re: 6Mhz and more...
« Reply #178 on: 2018.January.17. 09:31:03 »
:smt041 :smt041 :smt041

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Re: 6Mhz and more...
« Reply #179 on: 2018.January.17. 11:42:30 »
Maybe I was careless.
In the descriptions I did not see the Z80 need to be replaced with 10Mhz?