Easy to build dual trigger pad with adjustable cone height

[r0bbie]

The springs are just to keep the puck level and centered
That's why I wrote that I will do my 6 lug shells with only 3 springs.

I think that if you only glue the puck to the foam, the center piece might fall over after a while (sorry could'nt find better words).
Secondly if you adjust cone height, the puck will rotate with the bolt giving problems with the wiring of the piezo.

[daddy4life85]

I'd say it would be better to have a fine point that just touches the middle of the puck to adjust height rather then a big surface like that. Looks like your losing a lot of what the benefits would be of having the springs.

[r0bbie]

I'd say it would be better to have a fine point that just touches the middle of the puck to adjust height rather then a big surface like that. Looks like your losing a lot of what the benefits would be of having the springs.

Hello Daddy,
As I have stated earlier, "The springs are just to keep the puck level and centered " and really nothing else.

This is my first version of this concept, there are numerous variations possible.
The thing is, this version works so great ...

[daddy4life85]

I understand that. I was just saying that the whole point of the suspension is supposed to keep the rimshot vibrations away from the head piezo. So by having the base plate thing touching the puck you're kind of doing the opposite. I understand what your goal was though I was just throwing an idea out is all. Having something with a fine point at the end to just barely touch the puck just for height adjustment and having the springs holding up the puck. This would minimize the amount of vibration transferred to the puck I would think.

I am glad your method works though! I was just thinking out loud.

[Ruiner46]

I think this is a great idea, and the innovation is really in the hockey puck and foam combination. Looks like a great way to isolate the head piezo. The springs look unnecessary and if I were to build this design, I'd try out some fishing line or string to replace them. Something you could keep the slightest amount of slack on, so they didn't transmit vibration from the rim.

[Ken Forgettable]

And to finish it for the looks, I have put a piece of stretch cloth between the shell and the rim.

This extra layer of cloth will significantly add to the dampening too.

Over time I've ended up using a V-belt tensioner for different heads and tensioning tests

You might like to check out your design changes by examining the sensor output using your soundcard. See this: http://xoscope.sourceforge.net/hardware/hardware.html

Leaving the Megadrum out of the loop in these experiments is highly desirable and you can always plug in your amp' output later to see how Dmtri's code responds to your expectations.

[daddy4life85]

I will say your quality of sound card is going to greatly effect how well that program works for you My onboard soundcard from my HTPC had all kinds of issues with it.

[Ken Forgettable]

I will say your quality of sound card is going to greatly effect how well that program works for you My onboard soundcard from my HTPC had all kinds of issues with it.

I wouldn't trust myself with an onboard input. With this buffer circuit the output is manually set by the pot.
A £20 usb sound card stick should work fine - this was from a £3 SBlive.

sn-c7-t5-m1.gif

[r0bbie]

Ken,

Are those traces from head/rim piezo's at the same hit?

These are mine measured with nothing attached.

Channel-1 (top) is the head..

[Ken Forgettable]

Are those traces from head/rim piezo's at the same hit?
These are mine measured with nothing attached.

../sn-c7-t5-m1?

I think that image will be a composite from three firm hits through the radius of a 14" snare with a single ply Pearl muffle head with a certain tension – shows how bad things can get eh?

The signal was traced from the pin input of a SN74HC4851D.

Again, using a sound card as a AWG we can replay if need be ...a picture is worth a thousand words – my arse!

You results look good to me for a Roland comparison, have you clocked this: viewtopic.php?f=3&t=517