Touch Keyboard for Laptop using IC 8229BSF (TTP229)

To make a Touch Keyboard for my old Laptop (Acer TravelMate 2410) i used the following circuit eleven times !

 

Parts List:

IC 8229BSF (TTP229)

Resistor 1K

Resistor 1M

Capacitor 68pF (6pcs)

Capacitor 100nF

Capacitor 10uF 

Optocoupler PC817 (8pcs)

 

Circuit:

 

 

Reverse engineering of the old keyboard:

 

Video:

 

 

 

categories : circuits,home made projects,PCBWay,Touch switch