Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP8266 NodeMCU microcontroller, an L9110 motor driver, a relay module, a 9V battery, a 18650 Li-Ion battery, two hobby motors, and a water pump. The circuit is designed to control the motors and the water pump using the ESP8266 NodeMCU.

Component List

1. ESP8266 NodeMCU

   • Description: A low-cost Wi-Fi microcontroller.
   • Pins: D0, D1, D2, D3, D4, 3V3, GND, D5, D6, D7, D8, RX, TX, A0, RSV, SD3, SD2, SD1, CMD, SD0, CLK, EN, RST, VIN

2. L9110 Motor Driver

   • Description: A dual-channel motor driver.
   • Pins: MOTOR B-A, MOTOR B-B, MOTOR A-A, MOTOR A-B, B-IA, B-IB, GND, VCC, A-IA, A-IB

3. 18650 Li-Ion Battery

   • Description: A rechargeable lithium-ion battery.
   • Pins: Positive, Negative

4. Hobby Motor (Motor amarillo motorreductor)

   • Description: A small DC motor with a gearbox.
   • Pins: vcc, GND

5. Relay Module (5V-30V)

   • Description: A relay module for switching high-power devices.
   • Pins: common contact, normally open, normally closed, trigger, V-, V+

6. 9V Battery

   • Description: A standard 9V battery.
   • Pins: +, -

7. Water Pump

   • Description: A small water pump.
   • Pins: positive, negative

Wiring Details

ESP8266 NodeMCU

• D0 is connected to trigger of the Relay module.
• D1 is connected to B-IA of the L9110.
• D2 is connected to B-IB of the L9110.
• D3 is connected to A-IA of the L9110.
• D4 is connected to A-IB of the L9110.
• GND is connected to V- of the Relay module and GND of the L9110 and Negative of the 18650 Li-Ion.
• 3V3 is connected to V+ of the Relay module.
• VIN is connected to VCC of the L9110 and Positive of the 18650 Li-Ion.

L9110 Motor Driver

• MOTOR B-A is connected to vcc of the Hobby Motor.
• MOTOR B-B is connected to GND of the Hobby Motor.
• MOTOR A-A is connected to GND of the Hobby Motor.
• MOTOR A-B is connected to vcc of the Hobby Motor.
• B-IA is connected to D1 of the ESP8266 NodeMCU.
• B-IB is connected to D2 of the ESP8266 NodeMCU.
• A-IA is connected to D3 of the ESP8266 NodeMCU.
• A-IB is connected to D4 of the ESP8266 NodeMCU.
• GND is connected to GND of the ESP8266 NodeMCU and Negative of the 18650 Li-Ion.
• VCC is connected to VIN of the ESP8266 NodeMCU and Positive of the 18650 Li-Ion.

18650 Li-Ion Battery

• Positive is connected to VIN of the ESP8266 NodeMCU and VCC of the L9110.
• Negative is connected to GND of the ESP8266 NodeMCU and GND of the L9110.

Hobby Motor (Motor amarillo motorreductor)

• vcc is connected to MOTOR B-A of the L9110.
• GND is connected to MOTOR B-B of the L9110.

Hobby Motor (Motor amarillo motorreductor)

• vcc is connected to MOTOR A-B of the L9110.
• GND is connected to MOTOR A-A of the L9110.

Relay Module (5V-30V)

• common contact is connected to + of the 9V battery.
• normally open is connected to positive of the water pump.
• trigger is connected to D0 of the ESP8266 NodeMCU.
• V- is connected to GND of the ESP8266 NodeMCU.
• V+ is connected to 3V3 of the ESP8266 NodeMCU.

9V Battery

• + is connected to common contact of the Relay module.
• - is connected to negative of the water pump.

Water Pump

• positive is connected to normally open of the Relay module.
• negative is connected to - of the 9V battery.

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.