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\u0422\u0435\u043e\u0440\u0435\u0442\u0438\u0447\u0435\u0441\u043a\u0438, \u043c\u043e\u0436\u043d\u043e \u043f\u0435\u0440\u0435\u0434\u0435\u043b\u0430\u0442\u044c \u0438 \u043f\u043e\u0434 \u0430\u043a\u043a\u0443\u043c\u0443\u043b\u044f\u0442\u043e\u0440 \u0441 \u043e\u0434\u043d\u043e\u0439 \u044f\u0447\u0435\u0439\u043a\u043e\u0439, \u043d\u043e \u043d\u0443\u0436\u043d\u043e \u043f\u043e\u0434\u0431\u0438\u0440\u0430\u0442\u044c \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 MOSFET-\u043a\u043b\u044e\u0447\u0438 \u2014 \u0441 \u043d\u0438\u0437\u043a\u0438\u043c \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u0435\u043c \u043f\u0435\u0440\u0435\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0438 \u0441\u043e\u043f\u0440\u043e\u0442\u0438\u0432\u043b\u0435\u043d\u0438\u0435\u043c \u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0438. \u041c\u043e\u0436\u043d\u043e \u0431\u0443\u0434\u0435\u0442 \u0434\u0430\u0436\u0435 \u0443\u0431\u0440\u0430\u0442\u044c \u0434\u0435\u043b\u0438\u0442\u0435\u043b\u0438 R1+R2 \u0438 R3+R4, \u043f\u043e\u0432\u044b\u0441\u0438\u0432 \u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c \u0438\u0437\u043c\u0435\u0440\u0435\u043d\u0438\u044f \u0432 \u0434\u0432\u0430 \u0440\u0430\u0437\u0430 (\u0445\u043e\u0442\u044f \u0440\u0435\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u044d\u0444\u0444\u0435\u043a\u0442\u0430 \u0431\u0443\u0434\u0435\u0442 \u043d\u0435\u043c\u043d\u043e\u0433\u043e).<\/p>\n \u0420\u0435\u0437\u0438\u0441\u0442\u043e\u0440\u044b R5 \u0438 R6 \u2014 \u0434\u043e\u043b\u0436\u043d\u044b \u0431\u044b\u0442\u044c \u043c\u043e\u0449\u043d\u043e\u0441\u0442\u044c\u044e \u043d\u0435 \u043c\u0435\u043d\u0435\u0435 0.25 \u0432\u0430\u0442\u0442 (\u0430 \u043b\u0443\u0447\u0448\u0435 \u0438 \u0431\u043e\u043b\u044c\u0448\u0435). \u0412\u044b\u0445\u043e\u0434 LED \u2014 \u0434\u043b\u044f \u043f\u0430\u0440\u044b \u0431\u0435\u043b\u044b\u0445 \u0441\u0432\u0435\u0442\u043e\u0434\u0438\u043e\u0434\u043e\u0432, \u0447\u0442\u043e\u0431\u044b \u043c\u043e\u0433 \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u043a\u0430\u043a \u0430\u0432\u0430\u0440\u0438\u0439\u043d\u044b\u0439 \u0444\u043e\u043d\u0430\u0440\u0438\u043a.<\/p>\n
\u041e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u044b\u0439 \u0432\u044b\u043a\u043b\u044e\u0447\u0430\u0442\u0435\u043b\u044c, \u0447\u0442\u043e \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442 \u043a \u0434\u043e\u0432\u043e\u043b\u044c\u043d\u043e \u0431\u044b\u0441\u0442\u0440\u043e\u043c\u0443 \u0440\u0430\u0437\u0440\u044f\u0434\u0443 \u0431\u0430\u0442\u0430\u0440\u0435\u0438 (\u0437\u0430 \u0434\u0435\u043d\u044c \u0438\u043b\u0438 \u043e\u043a\u043e\u043b\u043e \u0442\u043e\u0433\u043e), \u043d\u0435\u0441\u043c\u043e\u0442\u0440\u044f \u043d\u0430 \u0441\u043f\u044f\u0449\u0438\u0439 \u0440\u0435\u0436\u0438\u043c. \u0422\u043e \u043b\u0438 \u044f \u0435\u0433\u043e \u043d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e, \u0442\u043e \u043b\u0438 \u0430\u0440\u0434\u0443\u0438\u043d\u043a\u0430 \u0441 \u0440\u0435\u0433\u0443\u043b\u044f\u0442\u043e\u0440\u0430\u043c\u0438 \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u044f \u0432 \u043d\u0435\u0439 \u0438 \u044d\u043a\u0440\u0430\u043d\u0435 \u2014 \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u044f\u044e\u0442 \u0441\u043b\u0438\u0448\u043a\u043e\u043c \u043c\u043d\u043e\u0433\u043e \u0434\u0430\u0436\u0435 \u0432 \u043d\u0435\u0430\u043a\u0442\u0438\u0432\u043d\u043e\u043c \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0438. \u041d\u0430\u0434\u043e \u0431\u044b\u043b\u043e, \u043d\u0430\u0432\u0435\u0440\u043d\u043e\u0435, \u043f\u043e\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0435\u0449\u0435 \u043e\u0434\u0438\u043d MOSFET-\u043a\u043b\u044e\u0447 \u043d\u0430 \u0432\u0441\u044e \u0441\u0445\u0435\u043c\u0443, \u0441 \u043c\u0430\u043b\u0435\u043d\u044c\u043a\u0438\u043c \u043f\u0435\u0440\u0435\u043a\u043b\u044e\u0447\u0430\u0442\u0435\u043b\u0435\u043c, \u0434\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f\/\u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u044f \u043f\u0438\u0442\u0430\u043d\u0438\u044f.<\/p>\n
![](\"https:\/\/habrastorage.org\/files\/607\/86b\/a48\/60786ba480464ca79a94df2b339bf29d.png\"\/)
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\u041a\u043e\u0440\u043f\u0443\u0441 \u0431\u044b\u043b \u043d\u0430\u043f\u0435\u0447\u0430\u0442\u0430\u043d \u043d\u0430 3D \u043f\u0440\u0438\u043d\u0442\u0435\u0440\u0435 \u0438\u0437 PLA. \u041f\u0443\u0441\u0442\u043e\u0435 \u043c\u0435\u0441\u0442\u043e \u043f\u043e\u0434 \u0440\u0430\u0437\u044a\u0435\u043c\u043e\u043c \u0430\u0442\u043e\u043c\u0430\u0439\u0437\u0435\u0440\u0430 \u2014 \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u043e\u0434\u043e\u0432 \u0431\u0430\u0442\u0430\u0440\u0435\u0439\u043a\u0438, \u0438\u0445 \u043d\u0430 \u043c\u043e\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u0430\u043a\u043a\u0443\u043c\u0443\u043b\u044f\u0442\u043e\u0440\u0430\u0445 \u0434\u0435\u043b\u0430\u044e\u0442 \u0434\u043e\u0432\u043e\u043b\u044c\u043d\u043e \u0434\u043b\u0438\u043d\u043d\u044b\u043c\u0438, \u0430 \u043e\u0431\u0440\u0435\u0437\u0430\u0442\u044c \u043d\u0435 \u0445\u043e\u0442\u0435\u043b\u043e\u0441\u044c.<\/p>\n
![](\"https:\/\/habrastorage.org\/files\/040\/a27\/05b\/040a2705bf784cfa997e5e8f36e4c3c0.jpg\"\/)
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\/\/ Temperature controller for cigarette, schematics in ard-smoke.sch \/\/ \/\/ Copyright (C) 2015 Vasim V. \/\/ \/\/ This program is free software: you can redistribute it and\/or modify \/\/ it under the terms of the GNU General Public License as published by \/\/ the Free Software Foundation, either version 3 of the License, or \/\/ (at your option) any later version. \/\/ \/\/ This program is distributed in the hope that it will be useful, \/\/ but WITHOUT ANY WARRANTY; without even the implied warranty of \/\/ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the \/\/ GNU General Public License for more details. \/\/ \/\/ You should have received a copy of the GNU General Public License \/\/ along with this program. If not, see <http:\/\/www.gnu.org\/licenses\/>. #include <U8glib.h> #include <MsTimer2.h> #include <TimerOne.h> #include <EEPROM.h> #include <avr\/sleep.h> \/\/ Additional info to console \/\/ #define DEBUG \/\/ Temperature ADC pin - ITEMP #define P_ITEMP 0 \/\/ Battery ADC pin - CHECK #define P_VMAIN 1 \/\/ Coil N-FET gate - OOn #define P_OON 9 \/\/ Temperature check N-FET gate - OTest #define P_OTEST 3 #define NBUTTONS 3 \/\/ Coil button #define P_BCOIL 10 \/\/ Plus button *\/ #define P_BPLUS 11 \/\/ Minus button *\/ #define P_BMINUS 12 \/\/ Delay for FET change, microseconds #define FETSW_DELAY 10 \/\/ Interrupt period (timer2), microseconds #define TIMER_PERIOD 10000 \/\/ PWM Period, microseconds #define PWM_PERIOD 1024 \/\/ Test resistor resistance, in Ohm #define RTEST 4.7f \/\/ Temparture-resistance koefficient \/\/ Titan #define RTCHANGE 0.0035f \/\/ Kantal - not working (too low resolution) \/\/ #define RTCHANGE 0.0001f \/\/ Default zero (when no difference between rcoil_zero and rcoil) temperature #define TEMP_ZERO 25 \/\/ Sleep timer (in timer2 cycles, seconds*100), activate if coil button was pressed for #define SLEEP_TIME 12000 \/\/ How long you should keep button pressed to change temperature, in time2 cycles (seconds*100) #define BUTTON_SENS_TIME 100 #define PID_P 60.0 #define PID_I 0.75 #define PID_D 20.0 U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_DEV_0|U8G_I2C_OPT_NO_ACK|U8G_I2C_OPT_FAST); \/\/ Coil is on or not boolean coil_on; \/\/ Voltage readings from ADCs int coilv; int vmainv; \/\/ Calculated from vmainv, in volts float vbat; \/\/ Calculated from coilv, in volts and ohms float voff; float rcoil; \/\/ Coil resistance at 25C float rcoil_zero = 0.0f; \/\/ Current temperature in celsius double tcur; \/\/ Cut-off temperature in celsius double tcut; \/\/ PID regulator stuff double Output; \/\/ Buttons debounce stuff #define I_BCOIL 0 #define I_BPLUS 1 #define I_BMINUS 2 uint8_t pbuttons[NBUTTONS] = {P_BCOIL, P_BPLUS, P_BMINUS}; uint8_t sw_check[NBUTTONS]; \/\/ Buttons state after debouncing boolean sbuttons[NBUTTONS] = {false, false, false}; \/\/ How long buttons state wasn't changed (in timer2 cycles) uint32_t idlebuttons[NBUTTONS] = {0, 0, 0}; \/\/ Ignore if buttons were pressed at startup boolean ignore_buttons = false; \/\/ In deep sleep boolean sleeping; double errSum, lastErr; double outputLast = 0.0; #define MAX_CHANGE 1023.0 void MyPIDStart() { errSum = lastErr = outputLast = 0.0; MyPIDCompute(); } \/\/ Calculate output void MyPIDCompute() { double timeChange = TIMER_PERIOD \/ 1000; double error = tcut - tcur; errSum += (error * timeChange); double dErr = (error - lastErr) \/ timeChange; double preOutput; \/*Compute PID Output*\/ preOutput = PID_P * error + PID_I * errSum + PID_D * dErr; if ((preOutput - outputLast) > MAX_CHANGE) preOutput = outputLast + MAX_CHANGE; else if ((outputLast - preOutput) > MAX_CHANGE) preOutput = outputLast - MAX_CHANGE; Output = preOutput - outputLast; if (Output < 0) Output = 0; \/*Remember some variables for next time*\/ outputLast = preOutput; lastErr = error; } \/\/ Calculate coil resistance and temperature void update_temp() { rcoil = (vmainv * RTEST) \/ (coilv * 1.0f + 1) - RTEST; if (rcoil < 0) rcoil = 0; if (rcoil_zero > 0.01) tcur = double((rcoil \/ rcoil_zero - 1) \/ RTCHANGE); else tcur = 0; } void eeprom_writef(int addr, float x) { uint8_t i; for (i = 0; i < sizeof(float); i++) { EEPROM.update(addr + i, *((char *) &x + i)); } } float eeprom_readf(int addr) { float x; int i; for (i = 0; i < sizeof(float); i++) { *((char *) &x + i) = EEPROM.read(addr + i); } \/\/ Test if we did read float really, not "NAN" if ((x+1.0) > x) return x; return 0; } \/\/ Timer interrupt - Test buttons, check temperature and fire coil, etc void intcallback() { uint8_t i; \/\/ Debounce buttons for (i = 0; i < NBUTTONS; i++) { if (sbuttons[i] != (digitalRead(pbuttons[i]) == LOW)) { if (sw_check[i] > 5) { sw_check[i] = 0; sbuttons[i] = (digitalRead(pbuttons[i]) == LOW); idlebuttons[i] = 0; } else { sw_check[i]++; idlebuttons[i]++; } } else { sw_check[i] = 0; idlebuttons[i]++; } } \/\/ Measuring temperature - turning off main coil FET before if (coil_on || ignore_buttons) { Timer1.disablePwm(P_OON); digitalWrite(P_OON, LOW); delayMicroseconds(FETSW_DELAY); } \/\/ Don't do anything else if (sleeping || ignore_buttons) return; digitalWrite(P_OTEST, HIGH); delayMicroseconds(FETSW_DELAY); coilv = analogRead(P_ITEMP); vmainv = analogRead(P_VMAIN); digitalWrite(P_OTEST, LOW); delayMicroseconds(FETSW_DELAY); \/\/ Measuring is done, turning on coil back if (coil_on) Timer1.pwm(P_OON, Output, PWM_PERIOD); else { Timer1.disablePwm(P_OON); digitalWrite(P_OON, LOW); } \/\/ Calculate temperature update_temp(); if (coil_on) \/\/ PID processing (calculate output) MyPIDCompute(); #ifdef DEBUG Serial.print("Temp: "); Serial.print(tcur+TEMP_ZERO); Serial.print("C, rcoil: "); Serial.print(rcoil); Serial.print("Ohm, Output: "); Serial.println(Output); #endif \/\/ Fire coil if button pressed if (!coil_on && sbuttons[I_BCOIL] && !ignore_buttons && (tcut >= tcur)) { MyPIDStart(); coil_on = true; Timer1.pwm(P_OON, Output, PWM_PERIOD); } \/\/ Coil shutdown if button is released or more than 50 celsius above if (!sbuttons[I_BCOIL] || ((tcur - 5) > tcut)) { coil_on = false; Output = 0; Timer1.setPwmDuty(P_OON, 0); Timer1.disablePwm(P_OON); digitalWrite(P_OON, LOW); } } void setup() { Serial.begin(115200); ignore_buttons = true; sleeping = false; \/\/ ADC pins pinMode(P_ITEMP, INPUT); pinMode(P_VMAIN, INPUT); \/\/ Coil\/check FETs pinMode(P_OON, OUTPUT); digitalWrite(P_OON, LOW); coil_on = false; pinMode(P_OTEST, OUTPUT); digitalWrite(P_OTEST, LOW); \/\/ Configuring buttons pins pinMode(P_BCOIL, INPUT_PULLUP); pinMode(P_BPLUS, INPUT_PULLUP); pinMode(P_BMINUS, INPUT_PULLUP); \/\/ Display init \/\/ Rotate if needed \/\/ u8g.setRot180(); \/\/ From u8g_lib example - assign default color value if ( u8g.getMode() == U8G_MODE_R3G3B2 ) { u8g.setColorIndex(255); \/\/ white } else if ( u8g.getMode() == U8G_MODE_GRAY2BIT ) { u8g.setColorIndex(3); \/\/ max intensity } else if ( u8g.getMode() == U8G_MODE_BW ) { u8g.setColorIndex(1); \/\/ pixel on } else if ( u8g.getMode() == U8G_MODE_HICOLOR ) { u8g.setHiColorByRGB(255,255,255); } \/\/ Read coil resistance at 25C from eeprom, update current values \/\/ rcoil_zero = eeprom_readf(0); tcut = eeprom_readf(4); if ((tcut < 100.0) || (tcut > 300.0)) tcut = 180; \/\/ Disable buttons until released if any of it pressed at startup if ((digitalRead(P_BPLUS) == LOW) || (digitalRead(P_BMINUS) == LOW) || (digitalRead(P_BCOIL) == LOW)) { int i; ignore_buttons = true; for (i = 0; i < NBUTTONS; i++) sbuttons[i] = (digitalRead(pbuttons[i]) == LOW); } else ignore_buttons = false; \/\/ Timers initialize MsTimer2::set(TIMER_PERIOD \/ 1000, intcallback); MsTimer2::start(); Timer1.initialize(1000); Timer1.pwm(9, 0, PWM_PERIOD); } static int loopcycle = 0; static int showtemp; static float showrcoil; void draw() { char tmpbuf[16]; if (!sleeping && idlebuttons[I_BCOIL] > SLEEP_TIME) return; u8g.setFont(u8g_font_helvR12); memcpy(tmpbuf, "Batt", 4); if (vmainv < 1022) { dtostrf(vbat, 4, 1, tmpbuf+4); memcpy(tmpbuf+8, "V - ", 4); } else memcpy(tmpbuf+4, " MAX", 5); if (vbat > 6.3) memcpy(tmpbuf+12, "OK", 3); else { if (loopcycle % 2) u8g.setFont(u8g_font_helvB12); memcpy(tmpbuf+12, "LOW!", 5); } u8g.drawStr(0, 64, tmpbuf); u8g.setFont(u8g_font_helvR12); if (sbuttons[I_BCOIL]) u8g.drawStr(90, 16, "C"); else u8g.drawStr(90, 16, "."); if (sbuttons[I_BPLUS]) u8g.drawStr(99, 16, "+"); else u8g.drawStr(99, 16, "."); if (sbuttons[I_BMINUS]) u8g.drawStr(108, 16, "-"); else u8g.drawStr(108, 16, "."); memcpy(tmpbuf, "= ", 3); dtostrf(tcut+25.0f, 4, 0, tmpbuf+2); u8g.drawStr(0, 48, tmpbuf); tmpbuf[0] = 'R'; dtostrf(rcoil, 5, 2, tmpbuf+1); memcpy(tmpbuf+6, "Ohm", 4); u8g.drawStr(0, 32, tmpbuf); dtostrf(float(showtemp), 4, 0, tmpbuf); tmpbuf[4] = 'C'; tmpbuf[5] = '\\0'; u8g.drawStr(18, 16, tmpbuf); if (coil_on) u8g.drawStr(0, 16, ">>"); else u8g.drawStr(0, 16, " "); dtostrf(float(Output), 5, 0, tmpbuf); u8g.drawStr(64, 48, tmpbuf); } \/\/ To test if minus button was pressed 3 times in 6 seconds - exit sleep mode boolean last_b_state; int nchanges; int ncycles; \/\/ Update EEPROM with temperature limit boolean update_eeprom = false; void loop() { int i; vbat = (10.0 * vmainv) \/ 1024.0; voff = (10.0 * coilv) \/ 1024.0; showtemp = tcur + TEMP_ZERO; \/\/ Redraw screen if (!sleeping) { \/\/ u8g_lib picture loop u8g.firstPage(); do { draw(); } while( u8g.nextPage() ); } \/\/ Change temperature limit if MINUS or PLUS pressed if (!ignore_buttons) { if (sbuttons[I_BMINUS] && idlebuttons[I_BMINUS] > BUTTON_SENS_TIME) { tcut = tcut - 5; idlebuttons[I_BMINUS] = 0; update_eeprom = true; } if (sbuttons[I_BPLUS] && idlebuttons[I_BPLUS] > BUTTON_SENS_TIME) { tcut = tcut + 5; idlebuttons[I_BPLUS] = 0; update_eeprom = true; } } \/\/ Sleep after turning off screen if (!sleeping && (idlebuttons[I_BCOIL] > SLEEP_TIME)) { sleeping = true; ignore_buttons = true; u8g.sleepOn(); } \/\/ Check if should wake up (MINUS button pressed few times) if (sleeping) { ncycles++; if (last_b_state != sbuttons[I_BMINUS]) { ncycles = 0; last_b_state = sbuttons[I_BMINUS]; nchanges++; if (nchanges >= 6) { rcoil_zero = 0; sleeping = false; u8g.sleepOff(); for (i = 0; i < NBUTTONS; i++) idlebuttons[i] = 0; } } else { if (ncycles > 20) { ncycles = 0; nchanges = 0; } } } \/\/ Check if all buttons are released if (ignore_buttons && !sleeping) { int i; boolean pressed = false; for (i = 0; i < NBUTTONS; i++) { if (sbuttons[i]) pressed = true; } if (!pressed) ignore_buttons = false; } loopcycle++; \/\/ Serial.println(vmainv); if (sleeping) { ignore_buttons = true; set_sleep_mode(SLEEP_MODE_PWR_SAVE); sleep_enable(); } if (((rcoil_zero < 0.01) && (rcoil > 0.01)) || (showtemp < -50)) { rcoil_zero = rcoil; \/\/ update_eeprom = true; } if (update_eeprom) { eeprom_writef(0, rcoil_zero); eeprom_writef(4, tcut); update_eeprom = false; } delay(333); } <\/code><\/pre>\n <\/p>\n
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![](\"https:\/\/habrastorage.org\/files\/05b\/f0a\/609\/05bf0a609e084ff29dfbe42d7cdbb053.jpg\"\/)
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