Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP32 microcontroller, a PTC, an MLX90614 temperature sensor, an OLED display, a touch sensor, a 5V battery, a MOSFET, and a resistor. The circuit is designed to interface various sensors and display data on an OLED screen, with power management and protection components.

Component List

1. ESP32 on Baseboard

   • Description: A versatile microcontroller with multiple GPIO pins.
   • Pins: GPIO23, GPIO22, GPIO1/TX, GPIO3/RX, GPIO21, GPIO19, GPIO18, GPIO5, GPIO17, GPIO16, GPIO4, GPIO0, GPIO2, GPIO15, SD1, SD0, CLK, V, G, GPIO36, GPIO39, GPIO34, GPIO35, GPIO32, GPIO33, GPIO25, GPIO26, GPIO27, GPIO14, GPIO12, GPIO13, SD2, SD3, GND, 5V, 3V, TX, RX, VCC, D22, D21

2. PTC

   • Description: A positive temperature coefficient thermistor used for overcurrent protection.
   • Pins: Neutral, Live

3. MLX90614

   • Description: An infrared temperature sensor.
   • Pins: SDA, SCL, GND, VIN

4. OLED Display 128x32

   • Description: A small OLED display for visual output.
   • Pins: SDA, SCL, VCC, GND

5. Touch Sensor

   • Description: A capacitive touch sensor.
   • Pins: IO, VCC, GND

6. 5V Battery

   • Description: A power source for the circuit.
   • Pins: Positive, Negative

7. MOSFET

   • Description: A type of transistor used for switching and amplification.
   • Pins: Gate, Drain, Source

8. Resistor

   • Description: A 220 Ohm resistor.
   • Pins: Pin1, Pin2
   • Properties: Resistance: 220 Ohms

Wiring Details

ESP32 on Baseboard

• GPIO23 is connected to IO of the Touch Sensor.
• GPIO22 is connected to SCL of the OLED Display.
• GPIO21 is connected to SDA of the OLED Display.
• GPIO19 is connected to SCL of the MLX90614.
• GPIO18 is connected to SDA of the MLX90614.
• GPIO4 is connected to Pin1 of the Resistor.
• GND is connected to:
  • Negative of the 5V Battery
  • Source of the MOSFET
  • GND of the MLX90614
  • GND of the OLED Display
  • Neutral of the PTC
  • GND of the Touch Sensor
• 5V is connected to:
  • Positive of the 5V Battery
  • VCC of the OLED Display
• 3V is connected to VIN of the MLX90614.
• VCC is connected to VCC of the Touch Sensor.

PTC

• Neutral is connected to GND of the ESP32 on Baseboard.
• Live is connected to Drain of the MOSFET.

MLX90614

• SDA is connected to GPIO18 of the ESP32 on Baseboard.
• SCL is connected to GPIO19 of the ESP32 on Baseboard.
• GND is connected to GND of the ESP32 on Baseboard.
• VIN is connected to 3V of the ESP32 on Baseboard.

OLED Display 128x32

• SCL is connected to GPIO22 of the ESP32 on Baseboard.
• SDA is connected to GPIO21 of the ESP32 on Baseboard.
• VCC is connected to 5V of the ESP32 on Baseboard.
• GND is connected to GND of the ESP32 on Baseboard.

Touch Sensor

• IO is connected to GPIO23 of the ESP32 on Baseboard.
• VCC is connected to VCC of the ESP32 on Baseboard.
• GND is connected to GND of the ESP32 on Baseboard.

5V Battery

• Positive is connected to 5V of the ESP32 on Baseboard.
• Negative is connected to GND of the ESP32 on Baseboard.

MOSFET

• Gate is connected to Pin2 of the Resistor.
• Drain is connected to Live of the PTC.
• Source is connected to GND of the ESP32 on Baseboard.

Resistor

• Pin1 is connected to GPIO4 of the ESP32 on Baseboard.
• Pin2 is connected to Gate of the MOSFET.

Code

No code is provided for this circuit.