Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as servos, pushbuttons, an ESP32 microcontroller, an ultrasonic sensor, an OLED display, a membrane matrix keypad, a piezo buzzer, and reed switches. The circuit is designed to interface these components with the ESP32 microcontroller to perform various tasks.

Component List

1. Servo

   • Description: A motor that can be controlled to move to a specific position.
   • Pins: gnd, vcc, pulse

2. Pushbutton

   • Description: A simple switch mechanism for controlling some aspect of a machine or a process.
   • Pins: Pin 3 (out), Pin 4 (out), Pin 1 (in), Pin 2 (in)

3. ESP32 (30 pin)

   • Description: A low-cost, low-power system on a chip microcontroller with integrated Wi-Fi and dual-mode Bluetooth.
   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3

4. HC-SR04 Ultrasonic Sensor

   • Description: A sensor used to measure distance by using ultrasonic waves.
   • Pins: VCC, TRIG, ECHO, GND

5. 0.96" OLED

   • Description: A small OLED display used for displaying information.
   • Pins: GND, VDD, SCK, SDA

6. Membrane Matrix Keypad

   • Description: A keypad with a matrix of buttons used for user input.
   • Pins: Row 1, Row 2, Row 3, Row 4, Column 1, Column 2, Column 3

7. Piezo Buzzer

   • Description: A device that uses piezoelectricity to generate sound.
   • Pins: pin 1, pin 2

8. Reed Switch

   • Description: An electrical switch operated by an applied magnetic field.
   • Pins: pin 1, pin 2

9. ESP32 - CAM

   • Description: An ESP32-based microcontroller with an integrated camera.
   • Pins: 5V, GND, IO12, IO13, IO15, IO14, IO2, IO4, VOT, VOR, VCC, IO0, IO16, 3V3

Wiring Details

Servo

• Servo 1

  • gnd: Connected to GND of ESP32
  • vcc: Connected to Vin of ESP32
  • pulse: Connected to D5 of ESP32

• Servo 2

  • gnd: Connected to GND of ESP32
  • vcc: Connected to Vin of ESP32
  • pulse: Connected to D19 of ESP32

• Servo 3

  • gnd: Connected to GND of ESP32
  • vcc: Connected to Vin of ESP32
  • pulse: Connected to D23 of ESP32

Pushbutton

• Pin 1 (in): Not connected
• Pin 2 (in): Not connected
• Pin 3 (out): Not connected
• Pin 4 (out): Not connected

ESP32 (30 pin)

• GND: Connected to gnd of Servo 1, Servo 2, Servo 3, HC-SR04 Ultrasonic Sensor, and 0.96" OLED
• Vin: Connected to vcc of Servo 1, Servo 2, Servo 3, HC-SR04 Ultrasonic Sensor, and 0.96" OLED
• D5: Connected to pulse of Servo 1
• D19: Connected to pulse of Servo 2
• D23: Connected to pulse of Servo 3
• D32: Connected to TRIG of HC-SR04 Ultrasonic Sensor
• D33: Connected to Row 1 of Membrane Matrix Keypad
• D25: Connected to Row 2 of Membrane Matrix Keypad
• D26: Connected to Row 3 of Membrane Matrix Keypad
• D27: Connected to Row 4 of Membrane Matrix Keypad
• D14: Connected to Column 1 of Membrane Matrix Keypad
• D12: Connected to Column 2 of Membrane Matrix Keypad
• D13: Connected to Column 3 of Membrane Matrix Keypad
• D22: Connected to SCK of 0.96" OLED
• D21: Connected to SDA of 0.96" OLED
• D18: Connected to pin 2 of Reed Switch 1
• TX2: Connected to pin 2 of Reed Switch 2
• RX2: Connected to pin 2 of Reed Switch 3
• D35: Connected to ECHO of HC-SR04 Ultrasonic Sensor

HC-SR04 Ultrasonic Sensor

• VCC: Connected to Vin of ESP32
• TRIG: Connected to D32 of ESP32
• ECHO: Connected to D35 of ESP32
• GND: Connected to GND of ESP32

0.96" OLED

• GND: Connected to GND of ESP32
• VDD: Connected to Vin of ESP32
• SCK: Connected to D22 of ESP32
• SDA: Connected to D21 of ESP32

Membrane Matrix Keypad

• Row 1: Connected to D33 of ESP32
• Row 2: Connected to D25 of ESP32
• Row 3: Connected to D26 of ESP32
• Row 4: Connected to D27 of ESP32
• Column 1: Connected to D14 of ESP32
• Column 2: Connected to D12 of ESP32
• Column 3: Connected to D13 of ESP32

Piezo Buzzer

• pin 1: Not connected
• pin 2: Not connected

Reed Switch

• Reed Switch 1

  • pin 1: Connected to GND of ESP32
  • pin 2: Connected to D18 of ESP32

• Reed Switch 2

  • pin 1: Connected to GND of ESP32
  • pin 2: Connected to TX2 of ESP32

• Reed Switch 3

  • pin 1: Connected to GND of ESP32
  • pin 2: Connected to RX2 of ESP32

ESP32 - CAM

• 5V: Not connected
• GND: Not connected
• IO12: Not connected
• IO13: Not connected
• IO15: Not connected
• IO14: Not connected
• IO2: Not connected
• IO4: Not connected
• VOT: Not connected
• VOR: Not connected
• VCC: Not connected
• IO0: Not connected
• IO16: Not connected
• 3V3: Not connected

Code

No code provided.