Recommended "piezo voltage conditioning board"?

[pauldotknopf]

Thanks for this awesome project!

Do you know where is find a "piezo voltage conditioning board"? Which would you recommend?

[SpintroniK]

I'm currently making a board. It'll be available soon.
How would you like to connect the piezos to the board?
I can make a board with a DB-25 connector (it's compatible with Roland e-drums), or terminal blocks.

[pauldotknopf]

Terminal blocks would be better for my use-case, I think.

I'm creating an LED suit that is controllable via MIDI (WIP). To start, I will be using an Orba 2 as the MIDI controller. However, I'd eventually like to create a glove that has piezos on the finger tips as a MIDI controller.

[pauldotknopf]

I might get to this before you do. I imagine this additional circutry is to smooth out the voltage over the triggers, right? So that the firmware doesn't have to do any crazy smoothing to figure out peek/velocity, etc, yeah?

[SpintroniK]

I have made the first 20 boards. They are 8-input boards (7 piezos + 1 FSR or switch).
If you use two boards, you get 14 piezo inputs + 2 FSR (or switch) inputs.
They will be available for sale in January.
The boards are piezo signal conditioner interfaces. They take piezo inputs and scale them down to 0-3.3V, with a bit of noise filtering, but not too much.
They are compatible with the Arduino Nano Very, but can be used with any other dev board, as long as a 5V and a "low noise" 3.3V voltages are provided.
The piezos are connected to terminal blocks. I will also sell an adapter board that breaks out the outputs, and provide two terminal blocks for the power supplies (5V and 3.3V).
Edit: I forgot to mention, there are potentiometers on the board. They can be adjusted to work with a wide variety of piezos.

[pauldotknopf]

How large is the board? I'm going to be mobile with my setup. I'm hoping I can hide what you got in some wearable pouch or backpack.

[SpintroniK]

The board is rectangular. Its form factor is the same as a Raspberry Pi Hat, so about 65x56.5mm.

[pauldotknopf]

Are the potentiometers per-piezo input? My use case would involve inputs all over the place (in my shoe, on my thigh, tip of my fingers, etc).

[SpintroniK]

Yes, each piezo has its own potentiometer.

[pauldotknopf]

Hey @SpintroniK, how's your project coming along? Available for sale yet?

[SpintroniK]

Hey @pauldotknopf, the project is online at RonnaTech.com.
I have the first 20 boards, but there are still a few legal details to take care of before I'm allowed to start selling them.
You can e-mail me at [email protected] if you want to know when the board is available for sale.