How to connect the clock (very basic)

[Cordial Iter]

Hi!

There seem to be two different ways to connect the DGT 3000.

I can directly connect the clock with the PI by some cables and soldering or connect the clock to the e-board. (I know about the necessary changes in the picochess.ini)

I have chosen the second way and wonder if this was the right decision.

Which way is preferable?

[Marc Hamilton]

Personally,  anything connected to the board is cumbersome when you have to spin it. 

Connecting a Raspberry Pi to a DGT 3000 clock is a simple process.

1) Source a 3.5mm jack plug that has 3 wires (red, white, black)

2) Spice the white and red wires so you have two red and two white wire leads

3) Connect the red leads to the #5 and #35 GPIOS

4) Connect the white leads to the #3 and #12 GPIOS

5) Connect the black lead to any ground GPIO (6,9,14, 20,34)

6) Plug the 3.5mm jack into the side of the DGT 3000 clock

I have the GPIO connections numbered and color coded in this image (zoom in). 

My current set up of Pi's wired for DGT clock

[volker.ho...@googlemail.com]

The guideline from the grandfather of picochess is still online:

https://picochess.com/howto-turn-a-dgt3000-into-a-dgtpi/

Also quite a lot of sample implementations.

I have the pi in the DGT3000 housing with a 3D printed extension. (Looks like a DGT-Pi)

[Marc Hamilton]

Yes, this is the website I used to get the GPIO connections. They are becoming a little outdated. For those connecting a 4b Pi to a DGT 3000 the red #35 connection is #23 and the white #12 is #19. The files dgtpicom and dgtpicom.so need updated. There is information and links on this forum concerning this. 

[Cordial Iter]

Thank you for the info! 

In addition to optical or practical reasons are there also technical reasons for connecting the clock directly to the PI? As far as I understand the Raspby gets slowed down by the changes in the .ini files.