>>> KIT AVAILABLE <<< All In One v2.8 PCB Kit to sell !

[Ken Forgettable]

... a bit ambiguous this. Comparing the v2.8 PCB with the All In One Schematics on the first page of this post shows the mistake in the schematic - or is it the PBC marking?

From Dmitris' Megadrum32 Digital board schema 21/7/08 he's using the weak pull ups and gets:
mCu pin - connector pin - button (0v)

6 ------------- 1 ------------- up
7 ------------- 2 ------------- down
8 ------------- 3 ------------- left
--------------- 4 -------------GND
6&7 -------------------------- right (two diode rejection thingy)

All is well.

In the Synthex PCB v2.8 Quick Manual.pdf (and else where) his keyboard connector is doc'd thus:
1 - Right
2 - Up
3 - Down
4 - Left
5 - GND

The two diodes are mounted and I assume the firmware is the same - so why the extra pin?

A continuity test for the v2.8 PCB show this:
mCu pin - connector pin - button (0v)
6 ------------- 2 ------------- up
7 ------------- 3 ------------- down
8 ------------- 4 ------------- left
--------------- 5 ------------- GND
6&7 ----------- 1 ------------- right (two diode rejection thingy)

So at the very least the v2.8 pcb keyboard connector should be marked topside as 43215

[Synthex]

I see not problem with keyboard connector ...

[Ken Forgettable]

I see not problem with keyboard connector ...

Hi Synthex,

Two questions:
What version of the firmware do I have?
What version of the bootloader do I have?

thanks.

[Synthex]

What version of the firmware do I have?

The last one (20081222)

What version of the bootloader do I have?

The last one (multi clock)

[Ken Forgettable]

Nice PCB though!!!

[BigDefender]

Hi Synthex,
Would it be possible to publish a bigger version of 'v2.8 mini.gif' please?

Thanks

[dmitri]

Hi Synthex,
Would it be possible to publish a bigger version of 'v2.8 mini.gif' please?

Thanks

Are you talking about the schematic gif? The schematic is full size in the PDF file in the first post.

[BigDefender]

Are you talking about the schematic gif? The schematic is full size in the PDF file in the first post.

Yes.

Thanks

[Ken Forgettable]

The keyboard connector in the Synthex PCB v2.8 Quick Manual.pdf schematic (page 4) *IS* wrong.

ATmega32 pin 8 is connected to pin 4 of the socket marked keyboard on the v2.8 PCB.

Hay
Is it correct that pin 1 of the keyboard is shorted with both cathodes of 1n4148 near it?
In my schematic both cathodes shorted with pin 4 of rhe keyboard, but my PCB is different.
or i have a problem reading the pins correct...

Thanks

Yes, pin 1 of the keyboard is shorted with both cathodes of 1N4148 ...

[Synthex]

Yes, you're right.
I will change the schematics.