Learn how to integrate a capacitive touch sensor into a circuit using a microcontroller, a resistor, and a capacitor. Discover the basics, design, programming, testing, and troubleshooting of ...

Fig. 2: Circuit diagram of the capacitive touch keyboard. The sensor setup includes a medium to high-value resistor, some jumper wires, a small piece of aluminum foil. You can use any resistor value ...

Circuit Setup: Wire up the touch sensor module to the Arduino Uno as per the circuit setup section. Code Upload: Open the Arduino IDE and create a new sketch. Copy and paste the provided Arduino code ...

The MPR121 (MPR121QR2) IC is the 2 nd generation capacitive touch sensor controller from Freescale Semiconductor. The chip features increased internal intelligence, some of the major pluses include an ...

Circuit Diagram. The schematic for connecting touch sensor with Arduino is simple and can be seen below, The transistor is used to switch on or off the Relay. This is due to the Arduino GPIO pins are ...

Connect two touch sensors to any analog I/O pins of Arduino. I used two pieces of copper foil, about 1 x 2 cm, spaced 1 cm of each other. Insulate the sensors so that user can not directly touch the ...