For the batch 1 boards you have to solder some cables. Batch 2 boards will include a new connector for the trigger IO.
Never planned the trigger IO in the first place, and the existing expansion header was just a precaution measure to make some unused pins and the shift registers accessible if they ever need to be used (additional frontpanel controls for example)
Maybe we can think about a discount for those brave early adopters as a compensation for the missing header
Thank you Julian for such a generous offer for Batch 1 pioneers!
How many cables need to be soldered? Would there be a way to get this header fixed on the board and solder these cables as jumpers between the points on the board and the fixed header? That way there could be a "plug in" board anyway? Some holes might need to be done, maybe I am dreaming impossible things?
it's not that hard to solder with batch1 boards. i soldered a flatcable directly to the header on the mainboard. (because i did't want any cables beeing visible on the top side of the pcb.) it's 14 connections by the way.
i thought about the possibility of putting the expansion board into eurorack and connect it to the lxr with a d-sub cable. this way there would be only one cable going from lxr to the modular. unfortunately the expansion board is to big for eurorack.
@julian i justbuilt the circuit from schematic and wired my sockets. so where do i solder the cables to the mainboard? is it active with the current firmware? if i connect say the 9v directly from the power socket will i then have 9 volt triggers? so i could have a switch for 5v/9v maybe..
i also will only do 5v for now cos i thought it might make the clock in voltage to high(?) or is it protected internally? simple enough for me to make two separate plus voltages too if required..
the clock input is not protected to voltages over 5V. thats what the transistor is there for in the first place. for the outputs it should work with higher voltages. but i have to do some transistor math before I can say if the circuit needs changes.
But I godda go to the local potatoe festival with girlfriend and son now So I can't say it just now.
For reference: I tested this with my x0x as a clock source running through a Midibox CV which translates midi clock to a 32 ppqn 5V clock signal with start/stop. The start/stop signal goes high when on, back down when off (I verified all this with my scope to make sure it was all working). With the LXR in sync mode, it would sync up fine and track tempo changes but does NOT stop when start/stop gate stops and goes low and I need to hit the start button twice for the LXR seq to stop
I will test it with my modular as clock and start/stop source. then there is still the problem that i have to find a tight way to multiply incoming clocks for the internal 32ppq resolution to enable a free adjustable input clock rate;)
Comments
Batch 2 boards will include a new connector for the trigger IO.
Never planned the trigger IO in the first place, and the existing expansion header was just a precaution measure to make some unused pins and the shift registers accessible if they ever need to be used (additional frontpanel controls for example)
Maybe we can think about a discount for those brave early adopters as a compensation for the missing header
i soldered a flatcable directly to the header on the mainboard. (because i did't want any cables beeing visible on the top side of the pcb.) it's 14 connections by the way.
i thought about the possibility of putting the expansion board into eurorack and connect it to the lxr with a d-sub cable. this way there would be only one cable going from lxr to the modular. unfortunately the expansion board is to big for eurorack.
so where do i solder the cables to the mainboard?
is it active with the current firmware?
if i connect say the 9v directly from the power socket will i then have 9 volt triggers? so i could have a switch for 5v/9v maybe..
This is the connector P1 on the mainboard. You can use the screenprint on the bottom of the board as a guide.
and here is the pinout of the connector on the trigger IO board
hope this helps.
functionality is available (minus clock prescalers) in the latest firmware.
for the outputs it should work with higher voltages. but i have to do some transistor math before I can say if the circuit needs changes.
But I godda go to the local potatoe festival with girlfriend and son now
So I can't say it just now.
i experimented with 9v and the clock is not reduced to 5v. triggers raised without changes.
shuffling and muting has never been so much fun julian ;-)
i think i need to connect the switching sockets to ground (at least inputs) cos i get unstable clock with nothing plugged in..
@fcd72 i had a lot more transistors spare than 074's, also the single supply versus dual. of course both are easy & cheap options.
I never expected you to build trigger IOs this fast
then there is still the problem that i have to find a tight way to multiply incoming clocks for the internal 32ppq resolution to enable a free adjustable input clock rate;)