1.Metal Touch Interface module and number 13 comes with LED
build a simple circuit to produce a touch cue lights comes with
digital interfaces of the LED, the metal touch sensor connected
digital three interfaces, when a metal touch sensor senses a key
signal, LED lights, otherwise off.
1.Metal Touch Interface module and number 13 comes with LED
build a simple circuit to produce a touch cue lights comes with
digital interfaces of the LED, the metal touch sensor connected
digital three interfaces, when a metal touch sensor senses a key
signal, LED lights, otherwise off.
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PL2303 PL2303HX USB To RS232 – OKY3412 
