Circuit Documentation

Summary of the Circuit

This circuit appears to be designed to control a Mini Diaphragm Water Pump using a 12V power supply and an IR sensor for triggering. The pump is controlled through a 12V single-channel relay, which is in turn driven by a TIP120 high-current Darlington transistor. The transistor is controlled by the output of the IR sensor, which is presumably detecting some form of input to activate the pump. A resistor is used to limit the current to the base of the transistor. The circuit also includes a separate 5V power supply that powers the IR sensor and the relay's control circuitry.

Component List

12v Battery

• Description: Provides the main power source for the relay and the water pump.
• Pins: +, -

5v Battery

• Description: Supplies power to the IR sensor and the relay control circuit.
• Pins: +, -

Mini Diaphragm Water Pump

• Description: The actuator in the circuit, responsible for pumping water when activated.
• Pins: Positive (+), Negative (-)

TIP120 Hi-Current Darlington Transistor

• Description: Acts as a switch to control high current loads with a low current signal.
• Pins: BASE, COLLECTOR, EMITTER

IR Sensor

• Description: Senses the presence of an object or movement, providing a signal to control the transistor.
• Pins: out, gnd, vcc

Resistor

• Description: Limits the current flowing into the transistor's base.
• Pins: pin1, pin2
• Properties: Resistance: 1000 Ohms

12V Single Channel Relay

• Description: Electrically operated switch that allows the water pump to be turned on or off.
• Pins: NC, COM, NO, IN, GND, VCC

Wiring Details

12v Battery

• + connected to the COM pin of the 12V Single Channel Relay and Positive (+) pin of the Mini Diaphragm Water Pump.
• - connected to the IN pin of the 12V Single Channel Relay and COLLECTOR pin of the TIP120 Transistor.

5v Battery

• + connected to the VCC pin of the 12V Single Channel Relay and vcc pin of the IR Sensor.
• - connected to the GND pin of the 12V Single Channel Relay and gnd pin of the IR Sensor.

Mini Diaphragm Water Pump

• Positive (+) connected to the + of the 12v Battery and NO pin of the 12V Single Channel Relay.
• Negative (-) connected to the EMITTER pin of the TIP120 Transistor.

TIP120 Hi-Current Darlington Transistor

• BASE connected to pin1 of the Resistor.
• COLLECTOR connected to the - of the 12v Battery.
• EMITTER connected to the Negative (-) pin of the Mini Diaphragm Water Pump.

IR Sensor

• out connected to pin2 of the Resistor.
• gnd connected to the - of the 5v Battery.
• vcc connected to the + of the 5v Battery.

Resistor

• pin1 connected to the BASE pin of the TIP120 Transistor.
• pin2 connected to the out pin of the IR Sensor.

12V Single Channel Relay

• NC not connected in this circuit.
• COM connected to the + of the 12v Battery.
• NO connected to the Positive (+) pin of the Mini Diaphragm Water Pump.
• IN connected to the - of the 12v Battery.
• GND connected to the - of the 5v Battery.
• VCC connected to the + of the 5v Battery.

Documented Code

There is no code provided for any microcontrollers in this circuit. If the circuit is intended to be controlled by a microcontroller, the code would be necessary to define the behavior of the IR sensor and the subsequent activation of the relay and water pump. Without the code, the circuit's operation is assumed to be purely hardware-based, with the IR sensor directly controlling the transistor and relay.