Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes a load cell, an HX711 bridge sensor interface, an HC-SR04 ultrasonic sensor, three LEDs (green, red, and orange), and an ESP32 DevKit V1 microcontroller. The circuit is designed to interface with various sensors and indicators, with the ESP32 serving as the central control unit.

Component List

Load Cell - Red/white/black/green

• Description: A load cell used for measuring weight or force.
• Pins: E+, A-, E-, A+

HX711 - Bridge Sensor Interface

• Description: An interface for bridge sensors, commonly used with load cells.
• Pins: E+, E-, A-, A+, B-, B+, GND - GROUND, DATA (OUT), SCK - CLOCK (IN), 3.3/3.5V Supply

HC-SR04 Ultrasonic Sensor

• Description: An ultrasonic sensor used for distance measurement.
• Pins: VCC, TRIG, ECHO, GND

LED: Two Pin (green)

• Description: A green LED used as an indicator.
• Pins: cathode, anode

LED: Two Pin (red)

• Description: A red LED used as an indicator.
• Pins: cathode, anode

LED: Two Pin (orange)

• Description: An orange LED used as an indicator.
• Pins: cathode, anode

ESP 32 DEVKIT V1 (30 pins)

• Description: A development board based on the ESP32 microcontroller.
• Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, VIN, 3V3, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23

USB power

• Description: A USB power supply.
• Pins: +, -

Wiring Details

Load Cell - Red/white/black/green

• E+ connected to E+ of HX711
• A- connected to A- of HX711
• E- connected to E- of HX711
• A+ connected to A+ of HX711

HX711 - Bridge Sensor Interface

• E+ connected to E+ of Load Cell
• A- connected to A- of Load Cell
• E- connected to E- of Load Cell
• A+ connected to A+ of Load Cell
• GND - GROUND connected to GND of ESP32, GND of HC-SR04, cathode of green LED, cathode of red LED, cathode of orange LED
• DATA (OUT) connected to D22 of ESP32
• SCK - CLOCK (IN) connected to D23 of ESP32
• 3.3/3.5V Supply connected to 3V3 of ESP32, VCC of HC-SR04

HC-SR04 Ultrasonic Sensor

• VCC connected to 3.3/3.5V Supply of HX711, 3V3 of ESP32
• TRIG connected to D21 of ESP32
• ECHO connected to D19 of ESP32
• GND connected to GND of ESP32, GND - GROUND of HX711, cathode of green LED, cathode of red LED, cathode of orange LED

LED: Two Pin (green)

• anode connected to D4 of ESP32
• cathode connected to GND of ESP32, GND - GROUND of HX711, GND of HC-SR04, cathode of red LED, cathode of orange LED

LED: Two Pin (red)

• anode connected to D18 of ESP32
• cathode connected to GND of ESP32, GND - GROUND of HX711, GND of HC-SR04, cathode of green LED, cathode of orange LED

LED: Two Pin (orange)

• anode connected to D5 of ESP32
• cathode connected to GND of ESP32, GND - GROUND of HX711, GND of HC-SR04, cathode of green LED, cathode of red LED

ESP 32 DEVKIT V1 (30 pins)

• D4 connected to anode of green LED
• D5 connected to anode of orange LED
• D18 connected to anode of red LED
• D19 connected to ECHO of HC-SR04
• D21 connected to TRIG of HC-SR04
• D22 connected to DATA (OUT) of HX711
• D23 connected to SCK - CLOCK (IN) of HX711
• 3V3 connected to 3.3/3.5V Supply of HX711, VCC of HC-SR04
• GND connected to GND - GROUND of HX711, GND of HC-SR04, cathode of green LED, cathode of red LED, cathode of orange LED

Code

No code provided.