Sync busboard design - for Cadet DIY systems



yeah , that is a good idea.
I’ll make a jumper for it, so that if you do not use this option, the stage is grounded.
(like in the schematic above )
Maybe I’ll add a “experimentation area”.

Question: Shall I leave out the resistors + capacitor, like in stage 1?
Maybe I can fit them, but if it is an experimental area, It might be useful not to have a predetermined use.


new stuff. 2nd c-sync bus for alternative connectors. / extra output.
When not used, there is an easy grounding option next to the LM6172. so a bypass = 2 jumpers
It all fits, so that is cool! The pcb has a less funky shape, oh well
And I’ve added one extra sync header. so there are nine in total!
Last check before I send it to China!


I don’t know anything that would be helpful here but thank you for doing this!


Ok, it is in production now.


Ok, they just came in! All is soldered now (I’m a few headers short), next is testing.


Cool! Excited to see!


First test is good! :grinning:

I need somebody to test the RCA sync output. Volunteers?


I have a visual cortex and other LZX RCA sync modules/vidiot, I’d be happy to test it out.


Where do you live? I would prefer someone in the EU because of the shipping time, but we will see :slight_smile:


test 2:

  • RCA Scope view: looks good.

  • multiple sync busses used. = OK


we have a volunteer!!!
let me know - see PM


ah I’m in the US I’m sure you’ll find someone closer :slight_smile:


yes, me, I live quite close to Martijn


Okay, we tested the busboard with LZX modules this afternoon. Thanks Jim!

  • RCA sync out --> works (tested with Prismatic Ray)
  • VC 14pin sync out to busboard -> works
  • busboard RCA out to RCA input 2nd sync gen --> works

So I declare it functional!

I’ll make a buildguide & BOM.
The pcb’s / kits / build units will be offered for sale.
I’ll ask Lars if it is ok to do it from this forum. I have an Etsy store as well.

I have 20 pcb’s in stock right now.

The price for a pcb will be about 20,- euro


It was a pleasure, Martijn!!

I have a busboard in my bag to test the BOM/buildguide

I’m going to test it with a frequency central psu - so will report back once all parts are delivered and I’ve built them


hah. How did I miss this. Good work Martijn!