Circuit Documentation

Summary

This circuit is designed to control a peristaltic pump, read data from a TDS (Total Dissolved Solids) sensor, and display information on an LCD display. It also includes temperature sensing capabilities and user input through arcade buttons. The ESP32 microcontroller serves as the central processing unit, interfacing with the sensors, the display, and controlling the relay which in turn controls the peristaltic pump. The circuit includes voltage regulation and LED indicators for visual feedback.

Component List

Peristaltic Pump

• A pump that moves fluid by alternately contracting and relaxing.
• Pins: +, -

ESP32 (30 pin)

• A 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

TDS Sensor

• A sensor used to measure the total dissolved solids in a liquid.
• Pins: P1, P2, +, -, A

Sonda Sensor TDS

• A probe that works with the TDS sensor to measure water quality.
• Pins: +, -

LCD Display 20x4 I2C

• An alphanumeric liquid crystal display with I2C communication.
• Pins: SCL, SDA, VCC, GND

Temperature Sensor

• A sensor for measuring temperature.
• Pins: Temp GND Black, Temp VDD Red, Temp DQ Data Yellow

2.1mm Barrel Jack with Terminal Block

• A power connector for supplying power to the circuit.
• Pins: POS, NEG

5v Relay

• An electromechanical switch used to control high power devices.
• Pins: Normally Open, Common terminal, Normally Closed, In, GND, VCC

Voltage Regulator

• A device that maintains a constant voltage level.
• Pins: ADJ, OUT, IN

LED: Two Pin (green, blue, red)

• Light Emitting Diodes used as visual indicators.
• Pins: cathode, anode

Resistor (200 Ohms)

• A passive two-terminal electrical component that implements electrical resistance.
• Pins: pin1, pin2
• Resistance: 200 Ohms

Arcade Button (yellow, red)

• A push-button switch that provides user input to the system.
• Pins: no name yet

Wiring Details

Peristaltic Pump

• + connected to the Normally Open pin of the 5v relay.
• - connected to the NEG pin of the 2.1mm Barrel Jack and OUT pin of the Voltage Regulator.

ESP32 (30 pin)

• D33 connected to the A pin of the TDS Sensor.
• D25 connected to the Arcade Button (yellow).
• D26 connected to the Arcade Button (red).
• D27, D14, D12 connected to the pin2 of the corresponding 200 Ohm Resistors.
• GND connected to the cathodes of the LEDs, GND pins of the TDS Sensor, LCD Display, Temperature Sensor, and the GND pin of the 5v relay.
• Vin connected to the + pins of the TDS Sensor, VCC pins of the LCD Display, Temp VDD Red of the Temperature Sensor, and the VCC pin of the 5v relay.
• D22 connected to the SCL pin of the LCD Display.
• D21 connected to the SDA pin of the LCD Display.
• D19 connected to the Temp DQ Data Yellow pin of the Temperature Sensor.
• D18 connected to the In pin of the 5v relay.

TDS Sensor

• P1 connected to the + pin of the Sonda Sensor TDS.
• P2 connected to the - pin of the Sonda Sensor TDS.
• + connected to the Vin pin of the ESP32.
• - connected to the GND pin of the ESP32.
• A connected to the D33 pin of the ESP32.

Sonda Sensor TDS

• + connected to the P1 pin of the TDS Sensor.
• - connected to the P2 pin of the TDS Sensor.

LCD Display 20x4 I2C

• SCL connected to the D22 pin of the ESP32.
• SDA connected to the D21 pin of the ESP32.
• VCC connected to the Vin pin of the ESP32.
• GND connected to the GND pin of the ESP32.

Temperature Sensor

• Temp GND Black connected to the GND pin of the ESP32.
• Temp VDD Red connected to the Vin pin of the ESP32.
• Temp DQ Data Yellow connected to the D19 pin of the ESP32.

2.1mm Barrel Jack with Terminal Block

• POS connected to the IN pin of the Voltage Regulator and the Common terminal pin of the 5v relay.
• NEG connected to the - pin of the Peristaltic Pump.

5v Relay

• Normally Open connected to the + pin of the Peristaltic Pump.
• Common terminal connected to the POS pin of the 2.1mm Barrel Jack.
• In connected to the D18 pin of the ESP32.
• GND connected to the GND pin of the ESP32.
• VCC connected to the Vin pin of the ESP32.

Voltage Regulator

• ADJ (not connected in the provided net list).
• OUT connected to the - pin of the Peristaltic Pump.
• IN connected to the POS pin of the 2.1mm Barrel Jack.

LED: Two Pin (green, blue, red)

• cathode connected to the GND pin of the ESP32.
• anode of the green LED connected to the pin2 of the corresponding 200 Ohm Resistor.
• anode of the blue LED connected to the pin2 of the corresponding 200 Ohm Resistor.
• anode of the red LED connected to the pin1 of the corresponding 200 Ohm Resistor.

Resistor (200 Ohms)

• pin1 of one resistor connected to the D27 pin of the ESP32 and the anode of the green LED.
• pin2 of the same resistor connected to the cathode of the green LED.
• pin1 of another resistor connected to the D14 pin of the ESP32 and the anode of the blue LED.
• pin2 of the same resistor connected to the cathode of the blue LED.
• pin1 of the third resistor connected to the D12 pin of the ESP32 and the anode of the red LED.
• pin2 of the same resistor connected to the cathode of the red LED.

Arcade Button (yellow, red)

• The pin of the yellow button connected to the D25 pin of the ESP32.
• The pin of the red button connected to the D26 pin of the ESP32.

Documented Code

No code was provided for the microcontroller(s) in the circuit. The documentation of the code would typically include descriptions of the functions, the main loop, and any interrupt service routines, along with explanations of how the code interacts with the hardware components listed above.