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  • POWER SOURCE

  • The IP5306 Power Management IC is attached to the 3.7V 2600mAh 18650 Li-ion Cell, which serves as the power source. It raises the 3.7V to a stable 5V so that the XIAO MCU, display, and sensor can function. When we insert the cell into its holder and...
  • Circuit

  • Let us now analyze the main control circuit. Three sections make up this circuit: the XIAO M0 Microcontroller section, the MAX6675 Setup, and the AC section, which is connected to an isolated SMPS and relay. Let us begin with the primary part of this...
  • Adding type-K thermocouple

  • Following circuit completion, we connected the K-type Thermistor supplied by the MAX6675 module to the MAX6675 IC's CON2 screw connection. In order to test the circuit, we heat the temperature sensor with a lighter and set the threshold to 40°C....
  • CODE

  • Here's the code used in this build: const int LED = 0; const int threshold = 150;//cuttoff temp MAX6675 thermocouple(thermoCLK, thermoCS, thermoDO); void setup() { display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR); pinMode(RelayPin, OUTPUT); pinMode(LED,...
  • CIRCUIT

  • Let's have a closer look at the circuit. It consists mainly of three sections: the XIAO ESP32S3 and SSD1306 display are connected via the XIAO MCU's I2C pins in the first section. The voltage divider part comes next, and it is made up of two resistors...
  • FINAL RESULT

  • The end product of this project is a lithium-ion charger with an integrated battery monitoring system. The voltage of the battery is detected by the XIAO MCU and shown on the OLED screen. The TP4056 features two indicator LEDs. One LED illuminates during...
  • CODE

  • #define FASTLED_ALLOW_INTERRUPTS 0 #include FASTLED_USING_NAMESPACE #define DATA_PIN D0 #define NUM_LEDS 15 #define MAX_POWER_MILLIAMPS 500 #define LED_TYPE WS2812B #define COLOR_ORDER GRB //////////////////////////////////////////////////////////////////////////...
  • Part 2 - What we need

  • Let's see all the needed parts and also check the schematic for this project below in order to know where to connect each part. We need the 220V to 12V regulator, the solid-state relay, an ESP32S smd version, some SMD capacitors and resistors, a diode,...
  • Part 5 - Website + Database

  • Please check my previous tutorial about IOT with the ESP32 in order to understand more because I won’t go over those steps again. In the video below you learn how to make the website, the database, the internet connection and so on. Follow...
  • Part 7 - Full Tutorial Video

  • Now as you can see in the tutorial video, each time I toggle the button on my website, the LED on the NOOBIX board is also turning on and off. But we can also connect it to high voltage. Connect a 220V load at the output. Then we add a cable at the input...