One more MegaDrum firmware to test

[Ken Forgettable]

Got 8 zone sensing with a variation on <http://www.redcircuits.com/Page17.htm>

[Ken Forgettable]

Another simulation that demonstrates wave motion in a perfectly elastic circular membrane (like a drum head).

http://www.falstad.com/circosc/directions.html - The rest of this site is worth a look too.

[mackanov]

A bit late, I know, but here's my results with a DIY 14" snare:

[rockdude]

A bit late, I know, but here's my results with a DIY 14" snare:

It's never too late for positional sensing!
I really hope this feature can be implemented with good results. It would be a killerfeature for MegaDrum for sure.

[mackanov]

A bit late, I know, but here's my results with a DIY 14" snare:

It's never too late for positional sensing!
I really hope this feature can be implemented with good results. It would be a killerfeature for MegaDrum for sure.

Agreed!

I know it can be very very hard for it to work with such mixed pads as MegaDrum supports, but even if Dmitri can make it work with only Pintech pads or Roland ones I think it's worth it. As soon as my 10" and 8" custom DIY pads are ready I'll post new results, if there's interest.

[rockdude]

A bit late, I know, but here's my results with a DIY 14" snare:

It's never too late for positional sensing!
I really hope this feature can be implemented with good results. It would be a killerfeature for MegaDrum for sure.

Agreed!

I know it can be very very hard for it to work with such mixed pads as MegaDrum supports, but even if Dmitri can make it work with only Pintech pads or Roland ones I think it's worth it. As soon as my 10" and 8" custom DIY pads are ready I'll post new results, if there's interest.

Well, I'm interested! I've got an DIY A to E converted snare that I can test with myself.

[dmitri]

I have recently been working on it very hard. With a new algorithm with Roland PD-125X and Drumtec mesh snares I got very good results. I had a chance to compare with TD-12 and I got the same precision except for very light hits.

Don't hold your breath, this test was done with a development board based on STM32 and requires a precision rectifier (1 or 2 opamps per channel depending on power source) since the first half wave they produce is negative. I haven't tested it with Atmega.
A dedicated precision rectifier per channel is too expensive/complicated so I'm working on version which would require only 2 opamps per 8 channels). As a side effect, the precision rectifier may almost eliminate the need for a voltage divider for too hot pads.

I don't like making promises and then not to deliver so I will only give more details when I am satisfied with results I get.

[rockdude]

I have recently been working on it very hard. With a new algorithm with Roland PD-125X and Drumtec mesh snares I got very good results. I had a chance to compare with TD-12 and I got the same precision except for very light hits.

Don't hold your breath, this test was done with a development board based on STM32 and requires a precision rectifier (1 or 2 opamps per channel depending on power source) since the first half wave they produce is negative. I haven't tested it with Atmega.
A dedicated precision rectifier per channel is too expensive/complicated so I'm working on version which would require only 2 opamps per 8 channels). As a side effect, the precision rectifier may almost eliminate the need for a voltage divider for too hot pads.

I don't like making promises and then not to deliver so I will only give more details when I am satisfied with results I get.

Sounds promising Dmitri! I don't think I understand exactly, but would it require me to build a new MegaDrum with other parts? I have now clue about rectifier and opamps
Please keep us updated on your results and thoughts

I'm a big fan of Drum-tec mesh heads btw!

[mackanov]

I don't like making promises and then not to deliver so I will only give more details when I am satisfied with results I get.

I totally understand that. If you need any help, we're here for you, no strings attached!

(Oh great, more components I can't find here... Haven't even properly finished my build! )

[zaklinacz]

...and requires a precision rectifier (1 or 2 opamps per channel depending on power source) since the first half wave they produce is negative

The first half will be positive if we change polarization? I guess yes... The only tihing is to change wires from piezo sensor.
BR
Michal