Schematic for ESP32 Robot Controller: Spot the mistake! Learn how...

Chat

Welcome to Flux

Treat Flux like your intern. Tell it what you'd like to build and it'll get to work. You can also ask it questions, brainstorm ideas, and teach it your preferences. Learn More

Explain project

Write a project description

Find schematic issues

Create a test plan

Ready.

explain this project.

nico

@copilot explain this project.

copilot

This project involves designing an ESP32-based control board for autonomous or radio-controlled robots. The board integrates various components, including sensors, encoders, an RC receiver, and an I2C display for configuration. Here is a detailed breakdown:

Project Overview

Controller: ESP32-DEVKIT-V1, a microcontroller with Wi-Fi and Bluetooth capabilities, used for main processing and control.
Motor Drivers: TB6612FNG, which is a dual H-Bridge motor driver that can control two DC motors.
Power Regulation: 7805 voltage regulator, which converts higher voltages down to +5V needed for some components.
Sensors and Encoders: Various sensors and encoders for feedback from the robot's environment and motors.
RC Receiver: Flysky RC receiver for remote control inputs.
Display: I2C display for configuring and monitoring the robot's operation.

Key Components and Connections

Power Supply Nets:
- +3.3V: Power supply for ESP32 and other 3.3V components.
- +5V: Power supply for motor drivers and other 5V components.
- +VBAT: Battery voltage.
Signals for Motor Control:
- $\text{MotorA\_IN1}$ , $\text{MotorA\_IN2}$ , $\text{MotorB\_IN1}$ , $\text{MotorB\_IN2}$ : Control signals for the motor driver.
- Connections for $U2 \text{ (TB6612FNG)}$ to MotorA and MotorB.
Sensor Inputs:
- Encoders: $\text{Encoder1\_ChA}$ , $\text{Encoder1\_ChB}$ , $\text{Encoder2\_ChA}$ , $\text{Encoder2\_ChB}$ : Encoder signals for tracking motor rotation.
- Buttons: $\text{Button1}$ , $\text{Button2}$ , etc., for user inputs.
- QTR Sensors: $\text{QTR1}$ , $\text{QTR2}$ : Typically used for line sensing.
Communication:
- I2C Bus: $\text{I2C\_SCL}$ , $\text{I2C\_SDA}$ : I2C communication lines for connecting the display and other I2C devices.
- IBUS_RX and $\text{IBUS_TX}$ : Signals for communication with the Flysky RC receiver.

Mistakes to Spot

Duplicate designators: For example, multiple entries for MotorA_IN1 and MotorB_IN1.
Undefined properties: Some components like C2 and C4 have missing capacitance values.
Incorrect net assignments: Ensure each component is properly connected to its corresponding nets.

General Flow of Power and Signals

Power Regulation:
- Battery voltage (+VBAT) is regulated to +5V using the 7805 voltage regulator ( $U3$ ).
- ESP32 and other 3.3V components are powered directly by a +5V to +3.3V converter onboard the ESP32.
Motor Control:
- ESP32 sends PWM signals and directional control signals to $U2 \text{ (TB6612FNG motor driver)}$ .
- The motor driver then controls the motors connected to $\text{AO1}$, $\text{AO2}$, $\text{BO1}$, $\text{BO2}$.
Sensor and Encoder Inputs:
- Encoders connected to ESP32 for motor feedback.
- Buttons for manual inputs.
Communication:
- I2C for display configuration.
- RC receiver for remote control inputs through $\text{IBUS_RX}$ and $\text{IBUS_TX}$.

Connections Example

Motor driver control for Motor A:
- MotorA_IN1 $\text{U1: D27}$ to $\text{U2: AIN1}$ .
- MotorA_IN2 $\text{U1: D14}$ to $\text{U2: AIN2}$ .

Let me know if you want more specific details or if there are particular areas you would like to focus on.

MotorA_IN1

J11

MotorB_IN1

Encoder2_ChA

+3.3V

Resistance

10K Ω

Encoder2_ChA

R19

Resistance

10K Ω

I2C_SCL

Capacitance

100u F

Encoder2_ChB

+VBAT

+3.3V

MotorA_IN2

Button3

QTR1

R11

Resistance

20K Ω

QTR1

R14

Resistance

10K Ω

I2C_SDA

I2C_SCL

Capacitance

Resistance

10K Ω

Resistance

20K Ω

MotorB_IN1

+5V

Button2

MotorB_IN2

R10

Resistance

10K Ω

Encoder1_ChA

Resistance

20K Ω

+3.3V

R13

Resistance

20K Ω

+5V

Capacitance

+5V

Button3

MotorB_IN2

+5V

+3.3V

+VBAT

Button2

R18

Resistance

20K Ω

Manufacturer Part Number

7805

+3.3V

IBUS_TX

Resistance

10K Ω

Button1

IBUS_RX

+3.3V

Resistance

2 Ω

J12

IBUS_RX

+5V

MotorA_IN2

Resistance

10K Ω

Capacitance

100u F

+VBAT

+5V

+3.3V

Button1

R15

Resistance

20K Ω

Resistance

10K Ω

Resistance

10K Ω

QTR2

+3.3V

Encoder2_ChB

+5V

Encoder1_ChA

IBUS_TX

+5V

Encoder1_ChB

J10

R12

Resistance

10K Ω

I2C_SCL

+3.3V

J14

Manufacturer Part Number

ESP32-DEVKIT-V1

SW3

SW1

SW8

SW2

J13

Reviews

Electrical Rule Checks

Missing Footprints

Reports parts that have no footprint.

Design Rule Checks

Overlapping Copper • 30

Des	Net	Des	Net
Trace 4f9c	Net - (3e8f - 52f6)	Trace 9334	Net 1
Trace 33df	Net - (6c48 - 40c3)	R4:P1	None
Trace 789f	Net - (6c48 - 40c3)	R4:P1	None
Trace ac9a	Net - (6c48 - 40c3)	R4:P1	None
Trace 3b24	Net - (7228 - f0c9)	J3:PIN1	None
Trace 3b24	Net - (7228 - f0c9)	SW8:2	None
Trace 6f33	Net - (7889 - 40c3)	J7:PIN2	None
Trace 8960	Net - (b172 - 40c3)	J12:PIN2	None
Trace 2c18	Net - (e3a7 - b99f)	SW8:1	None
Trace 7a44	Net - (e3a7 - b99f)	D1:A	None
Trace 11f3	Net - (e3a7 - b99f)	D1:A	None
Trace 5c2d	Net - (f082 - 40c3)	R12:P1	None
Trace 2428	Net - (f082 - 40c3)	R12:P1	None
Trace ea9d	Net - (f082 - 40c3)	J10:PIN2	None
Trace c82c	Net - (fd0a - b714)	J14:Pin_1	None
J3:PIN1	None	Trace a5f7	Net - (7228 - f0c9)
J6:PIN2	None	Trace 74e1	Net - (6c48 - 40c3)
J9:PIN2	None	Trace 47f0	Net - (31ad - 40c3)
J11:PIN2	None	Trace 1891	Net - (0651 - 40c3)
J11:PIN2	None	Trace a337	Net - (0651 - 40c3)
R6:P1	None	Trace 9ede	Net - (7889 - 40c3)
R6:P1	None	Trace ca58	Net - (7889 - 40c3)
R10:P1	None	Trace 7d23	Net - (31ad - 40c3)
R10:P1	None	Trace d5eb	Net - (31ad - 40c3)
R12:P1	None	Trace fa4d	Net - (f082 - 40c3)
R14:P1	None	Trace a337	Net - (0651 - 40c3)
R16:P1	None	Trace 983b	Net - (b172 - 40c3)
R16:P1	None	Trace 7371	Net - (b172 - 40c3)
R19:P1	None	Trace 4ae1	Net - (fd0a - b714)
R19:P1	None	Trace c82c	Net - (fd0a - b714)

Invalid Layer

Reports nodes that are assigned to a layer that doesn't exist in the layout stackup.

Component Overrides • 7

	Designator	Ruleset
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊

Airwires

Reports missing routed traces between pads in a net.

Deprecated Rules

Reports nodes that are using rules that are not supported anymore.

Layers with Multiple Fills

Reports layers that have multiple copper fills of different nets. Make sure the Connected Layers rule value of nets with fills is valid.

Floating Copper

Detect any via, trace or copper fill island that is not connected to any net.

Protected Intrusions

Reports intrusions from objects of other nets into polygons or fills that have the Protected layout rule applied.

Manufacturing

Manufacturer Part Number • 32

	Designator	MPN
	M2 Mounting Hole	None
	M2 Mounting Hole	None
	M2 Mounting Hole	None
	M2 Mounting Hole	None
	C3	None
	C4	None
	J4	None
	J5	None
	J13	None
	J14	None
	R1	None
	R2	None
	R3	None
	R4	None
	R5	None
	R6	None
	R7	None
	R8	None
	R9	None
	R10	None
	R11	None
	R12	None
	R13	None
	R14	None
	R15	None
	R16	None
	R17	None
	R18	None
	R19	None
	SW1	None
	SW2	None
	SW3	None

Parts Available

Beta

Checks that all parts have a part number and are available from distributors.

System Checks

Auto-Layout

Beta

Reports issues with Auto-Layout if Flux cannot route something or must ignore a configuration.

Passive Components

Resistor Power Rating

Beta

Checks that the power traveling across a given resistor is under its rating with 50% headroom.

Learn more

Pull Up/Pull Down Presence

Beta

Checks that IC pins that require pull up or pull down resistors have them.

Learn more

Capacitor Voltage Rating

Beta

Checks that capacitors have appropriate voltage ratings to prevent overheating and ensure reliable circuit operation.

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
jharwinbarrozo
15.1k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M

Inspect

ESP32 Robot Controller

Controls

Properties

Availability & Pricing

Distributor		Qty 1
	Arrow	$0.98–$2.75
	Digi-Key	$3.97–$5.79
	LCSC	$2.46–$3.22
	Mouser	$5.68–$5.89
	Verical	$31.76–$32.14

Assets

Thumbnail

Thumbnail ESP32.png

id=Thumbnail ESP32

Welcome 👋

Flux helps you build PCBs faster with an AI teammate!

Create your account to collaborate, stay updated, fork your own version, and get instant answers from our AI agent.