Dear Sir/Madam,

I read the datasheet of TTP223 touch sensor switch, the operating voltage is 2.0V~5.5V, I only have one 12V battery source, how can I wire the battery with 12V LED belt and this touch sensor switch? I know how the voltage divider work but no idea how to wire the I/O pin of the TTP223 touch sensor switch, do anyone can help?

Best regards,

Kelvin.

 

VCC to the output of the voltage divider, GND to ground and the OUT is your input signal to the circuit.

 

The TTP223 has a lot going on inside, running it straight from a resistor divider might not work well.
Use a small voltage regulator to insure a stable Vcc.

Use the output to drive an N-CH MOSFET driving your LED load.

 

VCC to the output of the voltage divider, GND to ground and the OUT is your input signal to the circuit.

Thanks, may I have the circuit diagram?

 

I would agree with Sensacell that a regulator would be preferable and can't help with MOSFETs, sorry. Here is the PDF link for the regulator.

http://www.ti.com/lit/ds/symlink/lm340.pdf

 

Thanks, may I have the circuit diagram?

If you don't need more than 100mA, then
http://www.ti.com/lit/ds/symlink/lm78l.pdf
Use LM78L05; section 8 of datasheet shows applications.