opensource THC for Plasma , Fiber laser and co2 laser

// Arduino RBD Capacitance Library v1.0.5 Example - Continuously print the capacitance value. // https://github.com/alextaujenis/RBD_Capacitance // Copyright (c) 2015 Alex Taujenis - MIT License #include <RBD_Capacitance.h> // https://github.com/alextaujenis/RBD_Capacitance #include "filters.h" const int allowed_freq = 5 * 1000 * 1000; const unsigned long DEFAULT_MIN_FREQ = 1 * 100; const unsigned long DEFAULT_MAX_FREQ = 30 * 10000; const unsigned long DEFAULT_MIN_CAPA = 0; const unsigned long DEFAULT_MAX_CAPA = 250; unsigned long min_freq = 200000;// = 1.2 * 1000; unsigned long max_freq = 300000;// = 12 * 1000; unsigned long min_capa = 196;// = 1 * 1000; unsigned long max_capa = 205;// = 4 * 1000; const int pwmpin = 22; RBD::Capacitance cap_sensor(13, 4); // send, receive pin const float cutoff_freq = 100.0; //Cutoff frequency in Hz const float sampling_time = 0.00005; //Sampling time in seconds. IIR::ORDER order = IIR::ORDER::OD1; // Order (OD1 to OD4) // Low-pass filter Filter f(cutoff_freq, sampling_time, order); int pwm_ch = 0; int resolution = 1; float capa_val; float capatofreq(float capa_val) { float ret_val = 0; if ( capa_val < min_capa ) { ret_val = min_freq; } else if ( capa_val > max_capa ) { ret_val = max_freq; } else { ret_val = min_freq + (max_freq - min_freq) / ((float)(max_capa - min_capa)) * (capa_val - min_capa); } //return ret_val; return (float)(max_freq - (ret_val - min_freq)); } void setup() { Serial.begin(115200); Serial.println("Starting..."); ledcSetup(pwm_ch, min_freq, resolution); ledcAttachPin(pwmpin, pwm_ch); cap_sensor.setSampleSize(15); } void loop() { cap_sensor.update(); if(cap_sensor.onChange()) { // code only runs once per event capa_val = cap_sensor.getValue(); Serial.print("capa_val: "); Serial.println(capa_val); float filteredval = f.filterIn(capa_val); capa_val = filteredval; int pwm_val = (int)capatofreq(filteredval); ledcSetup(pwm_ch, pwm_val, resolution); ledcWrite(pwm_ch, 1); Serial.print("filter_val: "); Serial.println(capa_val); Serial.print("capa mode pwm_val: "); Serial.println(pwm_val); } }