Skip to content

Instantly share code, notes, and snippets.

@JeremySCook
Created August 22, 2022 18:14
Show Gist options
  • Save JeremySCook/7899643f09b6373008c296adc73a6dc4 to your computer and use it in GitHub Desktop.
Save JeremySCook/7899643f09b6373008c296adc73a6dc4 to your computer and use it in GitHub Desktop.
Arduino capacitive sensor modified to blink LED with ATtiny
#include <CapacitiveSensor.h>
/*
* CapitiveSense Library Demo Sketch
* Paul Badger 2008
* Uses a high value resistor e.g. 10M between send pin and receive pin
* Resistor effects sensitivity, experiment with values, 50K - 50M. Larger resistor values yield larger sensor values.
* Receive pin is the sensor pin - try different amounts of foil/metal on this pin
*/
CapacitiveSensor cs_4_2 = CapacitiveSensor(1,2); // 10M resistor between pins 1 & 2, pin 2 is sensor pin, add a wire and or foil if desired
//CapacitiveSensor cs_4_6 = CapacitiveSensor(4,6); // 10M resistor between pins 4 & 6, pin 6 is sensor pin, add a wire and or foil
//CapacitiveSensor cs_4_8 = CapacitiveSensor(4,8); // 10M resistor between pins 4 & 8, pin 8 is sensor pin, add a wire and or foil
void setup()
{
cs_4_2.set_CS_AutocaL_Millis(0xFFFFFFFF); // turn off autocalibrate on channel 1 - just as an example
//Serial.begin(9600); //serial commented out to avoid delays
pinMode(4, OUTPUT);
}
void loop()
{
long start = millis();
long total1 = cs_4_2.capacitiveSensor(30);
// long total2 = cs_4_6.capacitiveSensor(30);
// long total3 = cs_4_8.capacitiveSensor(30);
/*
Serial.print(millis() - start); // check on performance in milliseconds
Serial.print("\t"); // tab character for debug windown spacing
Serial.print(total1); // print sensor output 1
Serial.print("\t");
Serial.print(total2); // print sensor output 2
Serial.print("\t");
Serial.println(total3); // print sensor output 3
*/
if (total1 > 8){
digitalWrite(4, HIGH);
}
if (total1 <= 8){
digitalWrite(4, LOW);
}
delay(10); // arbitrary delay to limit data to serial port
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment