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SD Card Tesla Coil MIDI Controller

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Phillip Slawinski
Tue Jan 31 2012, 03:21AM Print
Phillip Slawinski Registered Member #1732 Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
Hi All,

I've been working on a controller for a while. Just thought I'd share it. It does a ton of stuff:

Standard Interrupter
Phased Interrupter (for twin coils)
ARSG Emulator
MIDI Input
Midi File Mode
SSVC / QCW Mode

It also has lots of user configurable settings for things like maximum permissible on time, frequency, etc.

I also have unique channel indicator lamps that are actually RGB LEDs. The LEDs display color changes with duty cycle.

Here's a video of the controller playing a MIDI file. Link2 There are other videos on my channel demonstrating the other features.

Here are some photos of the controller board:

6729028569 5a537cf859



6729027651 49c8b12ac0
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mmt
Tue Jan 31 2012, 04:44PM
mmt Registered Member #2333 Joined: Thu Sept 03 2009, 03:04PM
Location: Slovakia
Posts: 80
just finished checking your photos on flicker, Great job! truly universal interrupter, are you planning to sell these?
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Phillip Slawinski
Wed Feb 01 2012, 04:30AM
Phillip Slawinski Registered Member #1732 Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
Yes, I am going to sell these, in fact, I already have sold some to a "select" few. Call them beta testers. The controller can be upgraded via SD Card, so add that to the list of features.
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E.TexasTesla
Wed Feb 01 2012, 02:38PM
E.TexasTesla Registered Member #4362 Joined: Sat Jan 21 2012, 03:44AM
Location: Texas
Posts: 98
Very nice. Are those express pc boards?

Surface mount makes me go cross eyed. ;)
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teravolt
Fri Feb 03 2012, 04:19AM
teravolt Registered Member #195 Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
good work Phillip, do you have a GUI to create the notes on the SD or do you have to create the music files manualy
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Bennem
Fri Feb 03 2012, 09:22AM
Bennem Registered Member #154 Joined: Sun Feb 12 2006, 04:28PM
Location: Westmidlands, UK
Posts: 260
Very nice work Phil!!
as always i'm in constant awe with your work.

mel.
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Phillip Slawinski
Fri Feb 24 2012, 01:16PM
Phillip Slawinski Registered Member #1732 Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
E.TexasTesla wrote ...

Very nice. Are those express pc boards?

Surface mount makes me go cross eyed. ;)

Haha, no, they're not from ExpressPCB. I ordered them from Advanced Circuits. The boards themselves were designed using Altium Designer.

teravolt wrote ...

good work Phillip, do you have a GUI to create the notes on the SD or do you have to create the music files manualy

No GUI required. I don't use a proprietary format for music files. This plays SMF (Standard MIDI Files).

Here's a better shot of the board:
6883960365 8ee038982f Z
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kwinchee
Tue Feb 28 2012, 11:19AM
kwinchee Registered Member #1287 Joined: Mon Feb 04 2008, 11:03AM
Location:
Posts: 15
This is really awesome man, Id love to buy one!
some really cool work!
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Steve Conner
Tue Feb 28 2012, 11:56AM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Looks great! smile

What are those thingies connected to the main board by the white flex cables?

The display looks nice in the video, is it an OLED?
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Phillip Slawinski
Tue Feb 28 2012, 12:22PM
Phillip Slawinski Registered Member #1732 Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
kwinchee wrote ...

This is really awesome man, Id love to buy one!
some really cool work!

Thanks for the compliment. I plan to put these up for sale to the public very soon. I just recently knocked the major issues out of my SMF file player. I still need to do a demo video, and write some documentation, but hopefully that won't take very long.


Steve Conner wrote ...

Looks great! smile

What are those thingies connected to the main board by the white flex cables?

The display looks nice in the video, is it an OLED?


The thingies connected via Flex cables are the Transmitter / RGB LED boards. Obviously the transmitter sends pulses to the coil, but you may be wondering about the RGB LED. The RGB LED serves as a channel indicator lamp. It is programmed to vary it's color based on the duty cycle of the signal being output. You can configure a maximum duty cycle in the software. The default duty cycle limit is 5.00%. As you adjust the values closer and closer to the maximum of 5% the color shifts from green to red, although you can reconfigure what the colors are for high and low duty. This duty cycle limiting is a pretty handy feature in practice. It helps to keep you from making mistakes, and really abusing your coil.

The main display is an OLED character display. It is a very nice display.
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