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| + | [title] Capacitive touch |
|---|---|
| + | [* red] The capacitive touch button and matching circuitry (marked in red) |
| + | [* yellow] The big gold circle you see in the middle of the PCB is a capacitive touch button. It’s simply an exposed piece of copper |
| + | [* violet] The TTP223B chip, this chip is a one-key touch pad detector that can detect the touch of a human finger on the touch pad. It does this by using the “Frequency Change” method |
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