Turning Glass Into a Touch-Sensitive Button
Glass can be made touch-sensitive by applying an indium tin oxide (ITO) coating that provides transparency and electrical conductivity. By placing two ITO-coated glass pieces face‑to‑face with a paper spacer, the glass flexes to allow the conductive layers to contact, creating a pressure‑sensitive button similar to resistive touch screens. The approach enables hobbyists to build multi‑position touch interfaces using simple materials and firmware.
- ▪ITO coating gives glass both optical transparency and a conductivity of about 20 Ω.
- ▪Two pieces of ITO‑coated glass are aligned with their conductive sides facing each other and separated by a paper spacer.
- ▪When the glass flexes, the ITO layers touch, completing a circuit and acting as a pressure‑sensitive switch.
- ▪The method mirrors resistive touch‑screen technology and can be adapted for multi‑position touch screens in hobby projects.
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| Original publisher | Hackaday |
| Canonical URL | https://hackaday.com/2026/07/31/turning-glass-into-a-touch-sensitive-button/ |
| Publication time | Sat, 01 Aug 2026 02:00:14 +0000 |
| Retrieval time | 2026-08-01T02:03:02.707Z |
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Opening excerpt (first ~120 words) tap to expand
Turning Glass Into A Touch-Sensitive Button No comments by: Maya Posch July 31, 2026 Title: Copy Short Link: Copy Although generally glass isn’t associated with touch-sensitive surfaces, the addition of an ITO (indium tin oxygen) coating adds the exciting property of not only being transparent to the visible light part of the electromagnetic spectrum, but also of being electrically conductive. The logical result is that fine folk like [Sokol] simply had to use their newly acquired ITO-coated glass to make a button out of. Here the easy option is of course to just use it as a capacitive sensor where the conductive ITO layer is used for the capacitive charge and the glass provides the insulator, but here we see it demonstrated how to create a pressure-sensitive implementation instead.
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