Circuit Documentation

Summary

This circuit is designed to control a water pump using a water sensor, a relay, and a transistor. The circuit is powered by a 9V battery and includes a solar panel for charging a Li-ion 18650 battery through a TP4056 module. A rotary potentiometer is used to adjust the sensitivity of the water sensor. An LED is included to indicate the status of the circuit.

Component List

1. Resistor

   • Description: A resistor with a resistance of 200 Ohms.
   • Pins: pin1, pin2

2. LED: Two Pin (red)

   • Description: A red LED with two pins: cathode and anode.
   • Pins: cathode, anode

3. 9V Battery

   • Description: A 9V battery to power the circuit.
   • Pins: -, +

4. NPN Transistor (EBC)

   • Description: An NPN transistor with three pins: emitter, base, and collector.
   • Pins: emitter, base, collector

5. Water Sensor

   • Description: A water sensor with two pins: - and +.
   • Pins: -, +

6. 1-Channel Relay (5V 10A)

   • Description: A 1-channel relay with six pins: NC, signal, C, power, NO, and ground.
   • Pins: NC, signal, C, power, NO, ground

7. Solar Panel

   • Description: A solar panel with two pins: + and -.
   • Pins: +, -

8. Li-ion 18650 Battery

   • Description: A Li-ion 18650 battery with two pins: - and +.
   • Pins: -, +

9. Water Pump

   • Description: A water pump with two pins: positive and negative.
   • Pins: positive, negative

10. TP4056

    • Description: A TP4056 module for charging the Li-ion battery.
    • Pins: OUT-, B-, B+, OUT+, IN-, IN+

11. Rotary Potentiometer

    • Description: A rotary potentiometer with a resistance of 10,000 Ohms.
    • Pins: leg1, wiper, leg2

Wiring Details

Resistor

• pin1 is connected to the anode of the LED: Two Pin (red).
• pin2 is connected to the wiper of the Rotary Potentiometer.

LED: Two Pin (red)

• anode is connected to pin1 of the Resistor.
• cathode is connected to the collector of the NPN Transistor (EBC).

9V Battery

• + is connected to the wiper of the Rotary Potentiometer.
• - is connected to:
  • leg1 of the Rotary Potentiometer
  • ground of the 1-Channel Relay (5V 10A)

NPN Transistor (EBC)

• emitter is connected to the signal of the 1-Channel Relay (5V 10A).
• base is connected to:
  • leg2 of the Rotary Potentiometer
  • - of the Water Sensor
• collector is connected to the cathode of the LED: Two Pin (red).

Water Sensor

• - is connected to the base of the NPN Transistor (EBC).
• + is connected to:
  • + of the 9V Battery
  • power of the 1-Channel Relay (5V 10A)

1-Channel Relay (5V 10A)

• signal is connected to the emitter of the NPN Transistor (EBC).
• ground is connected to the - of the 9V Battery.
• power is connected to the + of the Water Sensor.
• C is connected to the OUT+ of the TP4056.
• NO is connected to the positive of the Water Pump.

Solar Panel

• + is connected to the IN+ of the TP4056.
• - is connected to the IN- of the TP4056.

Li-ion 18650 Battery

• + is connected to the B+ of the TP4056.
• - is connected to:
  • B- of the TP4056
  • negative of the Water Pump

Water Pump

• positive is connected to the NO of the 1-Channel Relay (5V 10A).
• negative is connected to the - of the Li-ion 18650 Battery.

TP4056

• OUT+ is connected to the C of the 1-Channel Relay (5V 10A).
• B+ is connected to the + of the Li-ion 18650 Battery.
• B- is connected to the - of the Li-ion 18650 Battery.
• IN+ is connected to the + of the Solar Panel.
• IN- is connected to the - of the Solar Panel.

Rotary Potentiometer

• leg1 is connected to the - of the 9V Battery.
• wiper is connected to:
  • + of the 9V Battery
  • pin2 of the Resistor
  • ground of the 1-Channel Relay (5V 10A)
• leg2 is connected to the base of the NPN Transistor (EBC).

Code

No code is provided for this circuit.