About touch / finger pressure sensor

Thread Starter

jonv

Joined Feb 5, 2021
1
Hello,

currently which pressure / touch sensor is best suited to create experiences similar to piano keys?

Which low-cost pressure sensors are most suitable?
 

shortbus

Joined Sep 30, 2009
8,581
You do understand that piano keys in an acoustic piano are "weighted" to make each one feel the same when pressed? And some digital pianos do the same thing. But with a digital one you need switches with little or no bounce in the switch. Bounce in a switch is when the switching parts make and break contact before settling into the on or off state. If doing this for a DIY project I'd probably start off with taking a computer keyboard apart, and seeing if those switches/contacts could be repurposed for the piano keys. Or at least that would show how it is done in those to prevent contact bounce.

Have you seen this site where they talk about your interest? https://www.merriammusic.com/pianos/digital-pianos/how-digital-pianos-work/
 

djsfantasi

Joined Apr 11, 2010
7,693
First, the most common computer keyboards use mechanical switches. These all produce switch bounce which is debounced with on-board hardware. In the keyboards I had disassembled, this hardware is usually custom and proprietary.

Second, for this application the TS needs more than a key press. Acceleration and pressure are also needed. I also strongly suggest reading the above linked article.
 
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