Jaycar electronics selling a MIDI theremin

Posted: 10/15/2005 3:50:38 AM

From: Portland, OR

Joined: 10/10/2005

Any luck with this beasty? I'm wondering how playable it is. I have a Korg MS-2000 that would be tons of fun to control with it :)
Posted: 12/16/2005 9:42:38 AM

From: tokyo, japan

Joined: 12/12/2005


i'm a new poster here so first let me thank the community for giving me the incentive to go ahead and order one of these jaycar midi theremin kits, which hopfully will arrive before the holiday.

i also went ahead and paid to download the 2 silicon chip articles that detail the construction as i felt the extra expense might forestall any possible problems - you don't actually have to buy a year's subscription as a previous post states.

i guess others may wish to read the articles but i'm not sure of the legality of posting them wholesale on a forum such as this, so here are a few links to images(jpeg) of schematics. (if this violates any forum rule please let me know)

overview (http://wildchurch.com/mtcd1.jpg)

analogue circuit (http://wildchurch.com/mtcd2.jpg)

digital circuit (http://wildchurch.com/mtcd3.jpg)

i'm aware that the discreet note limitations of midi will make it less than 'theremin-like', but i'm fairly confident that the pitch shift messages can create something interesting. i'm kind of more interested in this thing as another means of enabling human interaction with my software. for those interested you can see what i currently use to manipulate soft synths here (http://wildchurch.com/techinfo.htm).

that's enough for now.
Posted: 1/1/2006 8:39:50 AM

From: tokyo, japan

Joined: 12/12/2005

built it, having lots of fun.

here are some photos, showing my custom box/antennae:




just need lots of practise now, i'll post some midi files/mp3s if anyones interested.

Posted: 1/1/2006 10:07:11 AM

From: Sammamish, Washington

Joined: 2/13/2005

Thanks for the great photos!! Please, some MP3 or MIDI files would be great. You can either post links to them here, or e-mail them to me and I'll make them available for download from the site.
Posted: 1/12/2006 5:03:39 AM

From: poland

Joined: 1/12/2006

hello i have a question what exactly is T1, T2, T3, T4 on this schematic ?? i don't know what i must buy

and if i buy all parts and put together will be working ?? or i must save something to microcontroler and if i must someone know that?? :)

sorry for english ;)
Posted: 1/17/2006 6:29:29 AM

From: tokyo, japan

Joined: 12/12/2005

hi dagi,

T1, T2, T3, T4 are the coils that provide the variable voltage that theremin use to adjust pitch and volume.

if you purchase the kit from jaycar all the components are included. if you want to build one from other sources i'm not sure how to advise you but the coils i believe are the same as in a regular theremin. the midi components may also be standard, but i can recommend this kit from jaycar for convenience and ease of build. however i built my own box and antennae to improve the playability and looks - the kit supplied looks like the image in the first post, on page 1 of this thread.

if you have any specific questions or want a list of the kit components, please ask and i'll be happy to help.

one more point, the pitch antenna is opposite to a regular theremin for some reason, i.e. moving your hand inward lowers pitch and away increases it. why? i don't know, the article that jaycar provide states this as being the way a theremin works which is wrong. i posted at their forum but no answer yet. still, as a gestural controller for software it's very effective.

Posted: 7/4/2006 9:27:51 AM

Joined: 7/4/2006

How have you connected to your laptop there? I'm interested in getting one of these but everywhere I have read only details it as using the printer port, which my laptop does not have.
Posted: 4/24/2007 6:14:52 PM

From: Malta

Joined: 4/24/2007

hi, i'm new to this forum.
i would like to know if someone can send me the parts list of this midi theremin.
thank you very much my email is maitsum12@yahoo.com

PS if you have some pics of your theremin send them aswell
Posted: 4/25/2007 8:54:18 AM

From: Jax, FL

Joined: 2/14/2005

Did you ever get an answer about why the pitch volume works in reverse?

Normally I would say that you simply need to tune the pitch circuit but if their documentation says it is supposed to work that way I can only scratch my head and wonder why they designed it that way.
Posted: 5/4/2007 9:01:39 PM

Joined: 3/4/2007

It seems the site discontinued this?

Anyone know where I can get a MIDI theremin?

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