I have been exploring different materials to create possible overlays for Tickle. The idea is creating something similar to Sensel’s overlays.
It is not that I do not like how Tickle looks, but different sound explorations require different tactile profiles. You know that Tangible Scores is mostly about this.
I know Tickle calibrates the capacitive surface when it starts, so I installed the following materials before connecting it to power. These are my results:
- Paper 50 gr: good location detection (CC 2, CC 4). MIDI notes well produced. Tactile feedback not so nice. It is quite granular.
- Paper 300 gr: good location XY (CC 2, CC 4), MIDI notes only received if touch surface is bigger.
- Paper 450 gr: error at location XY (CC 2, CC 4), MIDI notes received badly with error detection.
- Cardboard one layer (max 2 mm height): poor detection, not workable.
- Silicone: no touch detection at all.
- Wood (plywood 2 mm): no touch detection at all
- Tyvek®: good detection, OK if finger touch are is increased
- Plastic Sheet (typical office plastic sheet): good detection
Interestingly, it seems that CC2 and CC4 are more robust and better detected than the MIDI notes created after a simple finger touch. Is this observation correct?
Overlays could be a great idea for the future, however, I do not find a cheap material ready to work with the actual capacitive values. Maybe a PCB redesign with more lines could be an option to improve touch detection? Have you also tried any overlay?