Impact activated LEDs

[GregTaylor84]

Hi all I'm struggling with this. I have the ESP32 and Adafruit Lis3DH however I'm struggling big time on the coding to get it to work. Can someone please help so I can finish this gift for my brother.

Impact is from drumsticks in a drum

 

[Delta Prime]

https://www.esp32learning.com/code/lis3dsh-accelerometer-sensor-and-an-esp32.php

 

[GregTaylor84]

That has still left me in arms.
Is there anywhere or one that can write the code for me?

 

[Delta Prime]

How much is your brother worth?

 

[GregTaylor84]

How much is your brother worth?

Well that's a pretty extreme question which has no relation to my question.
A more suitable question would of been how much are you wanting to spend? Well my answer to that would be if you know how to do it then send me a quote or your details and we can discuss further

 

[Delta Prime]

Well that's a pretty extreme question which has no relation to my question

I answered your question?

A more suitable question would of been how much are you wanting to spend?

You sound like my mother.

Well my answer to that would be if you know how to do it then send me a quote or your details and we can discuss further

They don't print enough money.
Which makes your brother priceless or worthless depends on how you look at it.
Don't quote me on this."I'll do it for free."
What do you want the LED to do?

 

[GregTaylor84]

When the drum gets hit I want the led to flash & light the drum up. If possible whenever he hits it for them to then change colour

 

[Delta Prime]

Thank you for not quoting me...
What color?
And who made that drum?
It's pretty cool looks like a stick is going to fall out.

 

[GregTaylor84]

I have RGB leds so random colours.

I made the drum, it's made from all my brothers broken drum sticks over the years. Definitely none will fall out as they are in epoxy resin

 

[GregTaylor84]

And thanks I putt alot of work into it, wasn't easy

 

[Delta Prime]

And thanks I putt alot of work into it, wasn't easy

That makes your brother priceless. That's the way I look at it.
Others are going to jump in, on your thread that's encouraged here.
Good night kiddo.

 

[kellys_eye]

Fantastic craftsmanship and I'm sure your brother would be thrilled to receive such a gift regardless of the 'fancies' you wish to add. That said, the coding shouldn't be much of an issue for some on here - and I hope they drop in to this thread to assist - but it's beyond my own skill set and I only wish I could help.

Just had to speak my admiration for your project.

 

[danadak]

Basically one would sample the accelerometer, measure / compute the acceleration,
detect an abrupt change of acceleration (a hit), and set pwms to control RGB LED
to convey energy and a pulse effect of some sort to indicate the hit. Even evaluation
of hit for waveshape, eg. did he hit rim or stick on stick or main drum surface.

You can hire a consultant to do the work. I would recommend another drummer who
can do the debugging/evaluation to do a more robust design. Many cpu vendors have
listings of certified designers one can contact. In this case/ESP32 take a stab at con-
tacting Adafruit first see if you can make any headway.


Regards, Dana.

 

[Martaine2005]

Fantastic craftsmanship and I'm sure your brother would be thrilled to receive such a gift regardless of the 'fancies' you wish to add. That said, the coding shouldn't be much of an issue for some on here - and I hope they drop in to this thread to assist - but it's beyond my own skill set and I only wish I could help.

Just had to speak my admiration for your project.

I have to agree. The mold making for a cylinder of a particular size is quite difficult. I’m sure there were many hours of sanding and polishing to get the rims and hardware to fit. Great inspiration using the old broken sticks!.
I’m also sure that the wall thickness has dramatically changed. This can ‘dull’ the resonance drastically. But, as an ex drummer, you made a one off, beautiful tom. Your brother will be delighted and probably never hit it!.

Martin

 

[GregTaylor84]

Fantastic craftsmanship and I'm sure your brother would be thrilled to receive such a gift regardless of the 'fancies' you wish to add. That said, the coding shouldn't be much of an issue for some on here - and I hope they drop in to this thread to assist - but it's beyond my own skill set and I only wish I could help.

Just had to speak my admiration for your project.

Thank you I'm sure he will too but would be cool if I can have the option for the fancies.

 

[GregTaylor84]

I

Basically one would sample the accelerometer, measure / compute the acceleration,
detect an abrupt change of acceleration (a hit), and set pwms to control RGB LED
to convey energy and a pulse effect of some sort to indicate the hit. Even evaluation
of hit for waveshape, eg. did he hit rim or stick on stick or main drum surface.

You can hire a consultant to do the work. I would recommend another drummer who
can do the debugging/evaluation to do a more robust design. Many cpu vendors have
listings of certified designers one can contact. In this case/ESP32 take a stab at con-
tacting Adafruit first see if you can make any headway.


Regards, Dana.

Will have a look into that thank you.

 

[GregTaylor84]

I have to agree. The mold making for a cylinder of a particular size is quite difficult. I’m sure there were many hours of sanding and polishing to get the rims and hardware to fit. Great inspiration using the old broken sticks!.
I’m also sure that the wall thickness has dramatically changed. This can ‘dull’ the resonance drastically. But, as an ex drummer, you made a one off, beautiful tom. Your brother will be delighted and probably never hit it!.

Martin

Thank you yes there was a few hours making the mold and sanding, finally got it to fit snug. The wall thickness is as thick as a drum stick. It actually has a pretty cool sound to it. He has a gig coming up so I hope he does hit it haha

 

[danadak]

Here is a dev board with a 3 axis accelerometer on it and a project associated
with the accelerometer.

Regards, Dana.

 

[Harald Kapp]

Imho using an accelerometer for this purpose is like taking a sledgehammer to crack a nut (although both are technically possible ).

May I suggest a different approach? Use a microphone to detect the sound pulse. Within the drum there should be a well discernible change in air pressure aka a sound when the drumstick hits the membrane. You can buy microphone modules with an integrated adjustable threshold detector which activates a digital output when the sound level passes the threshold. Imho exactly what you want. See this detailed explanation on how to use a microphone module with an Arduino board (works the same with your ESP32) where lights are activated by sound. Comes with a circuit description and complete code.Sounds familiar to your original request?

A single LED as in the example may not be enough to light up the drum. Consider using multiple LEDs, but then you will need a driver as the little microcontrollers can't deliver enough power. Here's an example of such a driver module.

 

[Martaine2005]

Imho using an accelerometer for this purpose is like taking a sledgehammer to crack a nut (although both are technically possible ).

May I suggest a different approach? Use a microphone to detect the sound pulse. Within the drum there should be a well discernible change in air pressure aka a sound when the drumstick hits the membrane. You can buy microphone modules with an integrated adjustable threshold detector which activates a digital output when the sound level passes the threshold. Imho exactly what you want. See this detailed explanation on how to use a microphone module with an Arduino board (works the same with your ESP32) where lights are activated by sound. Comes with a circuit description and complete code.Sounds familiar to your original request?

A single LED as in the example may not be enough to light up the drum. Consider using multiple LEDs, but then you will need a driver as the little microcontrollers can't deliver enough power. Here's an example of such a driver module.

Interesting, I have a few of those mic modules. I might have a play. I haven’t found time yet to play with the arduino.

Martin