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Digineural

Solenoid driven acoustic drums

6 posts in this topic

I'm not sure if any of you have seen this before but this is sick.

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Any idea as to what type of solenoids these are?  I have got to have one of these setups at least for an 8 piece kit.

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Digineural,

I don't really know anything about the solenoids, but this site may be worth looking at:

http://www.pipeorganpercussions.com/catalog/

You could build your own electro-pneumatic actions like these and I think they'd be faster and easier to regulate than plain solenoids.

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I'm not sure if any of you have seen this before but this is sick.

Direct striking of the drums by the solenoid.  I like this approach better:

This uses some sort of rotary actuator (solenoid).

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I ended up grabbing 5 samples of the Burr-Brown DRV101 SMD variations and 5 DRV102 from TI. Using a schematic in the spec sheet and some inspiration from MIT I built a small board for my samples.  A single driver dev board and a 4x board to share voltage supplys.

I dont think I'm going to have a problem triggering the solenoids but I want to make them velocity sensitive as well.  For that, I think I'm going to have to regulate the voltage supplied to the solenoid using a vpot.  But I dont know yet so I'm digging around for research.

I throught about the beaters using an striker but theres too much mechanics involved for me to reasonably feel comfortable doing on my limited budget (translates to "married").  I really just want to mount the solenoid via a bracket to the drum head and position accordingly.

I think I'll end up using the core to read MIDI messages and proxy controls to the driver chips and vpots (again not sure here).  I'll probably start testing within the next week or two.

Thanks for the input.  Any help is grealty appreciated.

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I dont think I'm going to have a problem triggering the solenoids but I want to make them velocity sensitive as well.  For that, I think I'm going to have to regulate the voltage supplied to the solenoid using a vpot.  But I dont know yet so I'm digging around for research.

Some player piano actions use PWM to control the striking force of a solenoid.  You might think about that.

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Your right, I read the spec after the last post and it does use PWM to control the force.

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