Nord User Forum

Hello, here you can download the schematic and the firmware.

http://goo.gl/DRFSr

The .hex file need to be uploaded on a PIC16F84a.
Note that this is a first version of circuit and software.
It could be extended using a more little uc and using sleep mode to exdend the battery life.
Mine is power by a 9v battery. His life his about 4/5 months for a normal use.

The circuit sends theese midi control changes:
;Rotary Speaker Fast/Slow CC -> 0x52 ( CC 82 value -> 0 = slow, 127 = fast )
;Rotary Speaker Run/Stop CC -> 0x53 ( CC 83 value -> 0 = off, 127 = on )
I can image that fon NS2 rotary controls are the same...

enjoy

Emanuele

Ciao Emanuele,

great stuff!! Hope you don't mind me putting the schematics here as an image as I have some small doubts in particular regarding the connectors. I am not sure that I understand JP4 and Q1?!

But definitively gonna give it a try once I get back to where I stored all that electronics stuff. Plus need a good switch, but maybe an old original Hammond one will to the trick.
Anyway, would be awesome to have a full 3 position switch on the NS2.

On the NS2, the MIDI CCs should be:
RotorSpeed: cc82 (same as Electro)
RotorStop: cc91 (instead of 83 on the Electro)

Thanks for sharing!!
Johannes

I guess that JP4 is the power (9V?) 1 + and 2 -.
Q1 is perhaps a 4MHz quartz clock.

Hello...
yes, as Mr_G says, JP4 is a 9V battery, and Q1 a 4Mhz crystal.
About the switch, I used a simple guitar pikup 3 position switch (like this http://elderly.com/accessories/items/FP2041.htm ) .

Here you can find the firmware version for NS2 wich use CC91 as BRAKE instead of CC53.
Keep me informed if anyone build one of this unit!!!
Emanuele

Hi emastyle, do you have a suggestion for a programmer to load the code into the PIC16F84a?
Many thanks.

Hello, there are different kind of pic progrsmmer. I use a pickit2 clone. Searching in ebay it's easy to find ( example the item 160417234481 kept my attention).
Ciao

I might try to build one with an Atmel AVR instead of the PIC; I already disassembled your code, so I have something to peek at.

It would be interesting to add a MIDI in so I don't loose the use of MIDI in.

You can "simulate" half-moon with two pedals connected TRS Y cable? How is the connection of the TRS cable?
I do this with my sound motion, but I think the setting of the stereo cable is different because I can not access the STOP command in Nord, only change speeds.

This post is old, anyway, I've uploaded full project on github https://github.com/emastyle/ClaviaNE2_MidiRotaryControl .
I continue using this switch after 4 years!
Bye bye

this is my version (for NS3 and Electro 6):