Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP32 microcontroller, a buck converter, relays, a pushbutton, a resistor, an electrolytic capacitor, and a 12V battery. The circuit is designed to control relays using the ESP32, with power regulation provided by the buck converter.

Component List

1. ESP32 (30 pin)

   • Description: A versatile microcontroller with Wi-Fi and Bluetooth capabilities.
   • 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

2. Buck Converter

   • Description: A DC-DC converter that steps down voltage from 12V to 3.3V.
   • Pins: IN+, IN-, OUT+, OUT-

3. 3.3V Relay

   • Description: A relay that operates at 3.3V.
   • Pins: Normally open, Common, GND, Normally closed, Signal, VI 3.3V

4. Pushbutton

   • Description: A simple pushbutton switch.
   • Pins: Pin 2, Pin 1, Pin 3, Pin 4

5. Electrolytic Capacitor

   • Description: A capacitor with a capacitance of 4.9e-7 Farads.
   • Pins: -, +

6. Resistor

   • Description: A resistor with a resistance of 5000 Ohms.
   • Pins: pin1, pin2

7. 12V Battery

   • Description: A battery providing 12V power.
   • Pins: VCC, GND

Wiring Details

ESP32 (30 pin)

• GND is connected to:

  • Resistor pin2
  • Buck converter OUT-
  • Both 3.3V relay GND pins

• D23 is connected to:

  • Both 3.3V relay Signal pins

• D15 is connected to:

  • Pushbutton Pin 3
  • Electrolytic Capacitor -

• 3V3 is connected to:

  • Buck converter OUT+
  • Both 3.3V relay VI 3.3V pins

Buck Converter

• IN+ is connected to:

  • 12V Battery VCC

• IN- is connected to:

  • 12V Battery GND

• OUT+ is connected to:

  • ESP32 3V3
  • Both 3.3V relay VI 3.3V pins

• OUT- is connected to:

  • ESP32 GND
  • Both 3.3V relay GND pins

3.3V Relay

• Signal is connected to:

  • ESP32 D23

• GND is connected to:

  • Buck converter OUT-
  • ESP32 GND

• VI 3.3V is connected to:

  • Buck converter OUT+
  • ESP32 3V3

Pushbutton

• Pin 2 is connected to:

  • Resistor pin1
  • Electrolytic Capacitor +

• Pin 3 is connected to:

  • ESP32 D15
  • Electrolytic Capacitor -

Electrolytic Capacitor

• + is connected to:

  • Pushbutton Pin 2
  • Resistor pin1

• - is connected to:

  • Pushbutton Pin 3
  • ESP32 D15

Resistor

• pin1 is connected to:

  • Pushbutton Pin 2
  • Electrolytic Capacitor +

• pin2 is connected to:

  • ESP32 GND

12V Battery

• VCC is connected to:

  • Buck converter IN+

• GND is connected to:

  • Buck converter IN-

Code

No code is provided for this circuit.

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This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and code documentation. Each component is described in detail, and the wiring connections are clearly outlined to ensure proper assembly and functionality.