Beginner building a LXR Digital Drum Synth?

Eurynom3

At this moment i'm doing my second project, the Ambika! Everything is going well (with the help of nice people at the Mutable forum).

http://www.mutable-instruments.net/forum/discussion/4935/beginner-building-an-ambika
But now i also want to make the XLR Digital Drum Synth. Hopefully i can ask some questions here when neccesary. 

Eurynom3

Can you make the IO Trigger later? And if i'm correct, Midi In is already available in the standard kit, isn't it (or do you need the IO Trigger for this?

http://www.sonic-potions.com/triggerAssembly

Eurynom3

Just to be sure: for a working one i only need the complete kit + enclosure and a adapter? I want to use Midi in and out..

julian

yes, the trigger IO is an add-on.
It just attaches with a ribbon cable and can be installed at any time.

MIDI is available on the standard unit.
The trigger IO is just for analogue IOs

Complete kit + enclosure + power adapter is correct.
Maybe you want to add an SD card for the presets. Nothing fancy. even an old 129mb card would work here

Eurynom3

Awesome Just placed the order and will go for it!

revtor

Take your time and resist trying to do the whole thing at once, take a few days, a couple sections at a time.  Don't skip the testing in between sections!!   And double check everything is in right before inserting IC's and powering up.

Don't bother trying to get the black spacer on the display header down to the pcb.  Just remove it as mentioned.  

have fun, its a good build, great instructions.

~Steve  

Eurynom3

Thanks Steve! What is the building time?

revtor

Id say it took me... 6 hours in total?

Eurynom3

Ah ok! I've only made the motherboard of the Ambika, and that costed me way more time haha. So this is a small project

To be honest: i haven't read what the LXR is capable of. The project and the good instructions made me so enthusiastic, that i ordered it immediately. It sounds very full and clean to me. Is it comparable with another synth?  And what is making the LXR so special (except the good price and great sound)? 

Eurynom3

Maybe you want to add an SD card for the presets. Nothing fancy. even an old 129mb card would work here

Does it matter which SD card i take?

nightworxx

There is a compatibilty thread here somewhere, some SD cards are troublesome.

Eurynom3

Will this SD card work?

http://www.conrad.nl/ce/nl/product/411847/Transcend-SD-Card-2-GB-133x-Ultra-Speed?ref=searchDetail

Eurynom3

Or this one?

http://www.staples.nl/sd-hc-ultra-kaart-4gb/cbs/5880267.html?price=incvat&cm_mmc=SEM_PLA-_-google-_-feedgoogle&gclid=CJDvpO6Uzr0CFScHwwodbbsA_Q

julian

probably both will work.
In the end I think I only know of 1 or 2 cases where somebody had a non working SD card.

you don't need anything fancy at all.
take the cheapest you can get.
something like this would be sufficient, too
http://www.conrad.nl/ce/nl/product/992826/Transcend-SD-kaart-2-GB?ref=list

Eurynom3

I took some free hours from my job... and just got started with the LXR.. but then the 7805 regulator is missing So have to wait a few days to get started again. 

Eurynom3

Is this the right one?

http://www.newtone-online.nl/catalog/product_info.php?products_id=1132

Eurynom3

I know that 5V is ok, but what about the 1,5A?

loderbast

yes. 1,5A is fine

julian

sorry to hear that a part was missing
It seems you will get it locally?
otherwise I could send you one free of charge.

julian

you could also continue your build and do the voltage test later on.
As long as there are no ICs inserted and no display/mainboard connected you don't risk frying anything.

Eurynom3

No problem Julian, it can happen! Already ordered the part that i mention above. And hopefully that one will do just fine

Eurynom3

Jiha, finished my second DIY project today: the LXR digital drum synth. Thanks for the good description Julian, i learned a lot

https://scontent-b-ams.xx.fbcdn.net/hvideo-prn2/v/t43.1792-2/10258857_563148200450823_726147567_n.mp4?oh=c6c1787f5015a95b6a4082caa49a5617&oe=53496B01