R20 Resistor Pin Details

I checked the project and R20 is a generic 500 Ω, 0603 resistor, not a manufacturer-specific part.
Result
I could not find an exact datasheet for R20, because it does not have an MPN assigned. The web results only turned up generic 0603 chip resistor families, not a datasheet for this exact placed part.
Pins on R20

Table


PinSchematic pin numberWhat I can confirm
P11One terminal of the resistor
P22The other terminal of the resistor
Important limitation
Because R20 is a generic part with no exact datasheet, I can’t accurately give datasheet-derived:
  • pin function descriptions beyond “terminal 1” and “terminal 2”
  • input/output characteristics
  • special usage constraints like max voltage, power rating, tolerance, tempco, or pulse limits
For a generic resistor, the two terminals are typically interchangeable, but I’m not going to present that as a datasheet fact unless we first assign a real manufacturer part.
If you want the full pin-by-pin datasheet answer
I can help you:
  • find a real 0603 500 Ω resistor MPN
  • assign it to R20
  • then extract the exact datasheet details for each terminal, plus power, voltage, tolerance, and usage notes
If you want, I can next find a suitable real replacement part for R20 and give you the proper datasheet-based breakdown.
Find real MPN
Pick low-cost resistor
Check R20 ratings
Show R20 connections
MotorA_IN1
MotorA_IN1
MotorB_IN1
Encoder2_ChA
Encoder2_ChA
I2C_SCL
Encoder2_ChB
MotorA_IN2
Button3
QTR1
S4
QTR1
I2C_SDA
I2C_SCL
MotorB_IN1
S1
Button2
MotorB_IN2
Encoder1_ChA
QTR2
S4
Button3
S5
MotorB_IN2
Button2
IBUS_TX
Button1
IBUS_RX
S3
IBUS_RX
S5
MotorA_IN2
Button1
QTR2
S2
S3
Encoder2_ChB
Encoder1_ChA
IBUS_TX
Encoder1_ChB
S1
Encoder1_ChB
S2
I2C_SCL
J5
J11
+3.3V
J4
+VBAT
+3.3V
J9
+5V
+3.3V
J6
+5V
+5V
+5V
J7
+5V
+3.3V
+VBAT
+3.3V
+3.3V
J12
+5V
+5V
+VBAT
+5V
+3.3V
+3.3V
+5V
+5V
J8
J10
+3.3V
J14
R6
Resistance
10KΩ
R20
Resistance
500 Ω
R19
Resistance
10KΩ
C2
Capacitance
Capacitance
Capacitance
100uF
R17
Resistance
20KΩ
R11
Resistance
20KΩ
R14
Resistance
10KΩ
R2
Resistance
10KΩ
R7
Resistance
20KΩ
R16
Resistance
10KΩ
R10
Resistance
10KΩ
R5
Resistance
20KΩ
R13
Resistance
20KΩ
R18
Resistance
20KΩ
R3
Resistance
10KΩ
R9
Resistance
2 Ω
R8
Resistance
10KΩ
C1
Capacitance
Capacitance
Capacitance
100uF
R15
Resistance
20KΩ
R1
Resistance
10KΩ
R4
Resistance
10KΩ
R12
Resistance
10KΩ
C4
Capacitance
Capacitance
U2
J3
C3
Capacitance
Capacitance
U3
Manufacturer Part Number
7805
U1
Manufacturer Part Number
ESP32-DEVKIT-V1
J1
SW3
SW1
J2
D1
SW8
SW2
J13

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Project Specification
Version: 0.1.0 Date: ... Author: ... Status: ... Tags: ...

1. Executive Summary
What board we're building and the intended outcome in one paragraph. ...
2. Goals and Non-Goals
What must be true in this rev, and what is explicitly out of scope. ...
2.1 Goals
...
2.2 Non-Goals
...
3. System Overview
High-level description of the system and how the board fits into it. ...
3.1 Block Diagram
A space for a simple block diagram (power + data paths). ...
4. Requirements
What the design must do (behaviorally and electrically), independent of implementation details. ...
4.1 Functional Requirements
...
4.2 Electrical Requirements
Power input, rails, currents, interfaces, sensing accuracy, etc. ...
4.3 Environmental and Reliability Requirements
Operating ranges, expected lifetime, handling constraints, safety/compliance. ...
5. Constraints
Hard limits that shape the design choices. ...
5.1 Mechanical Constraints
Size, mounting, connector access, enclosure interactions. ...
5.2 Power and Thermal Constraints
Power source limits, dissipation ceilings, heat-sensitive components. ...
5.3 Layout / Implementation Constraints
High-level layout rules (keepouts, grounding intent, routing classes), without detailed PCB guidance. ...
5.4 Cost and Sourcing Constraints
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6. Assumptions and Dependencies
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7. Validation Criteria
What “done” means in terms of checks and evidence (not task lists). ...
7.1 Acceptance Tests
...
7.2 Review Checklist
...
Appendix (Optional)
Any supporting urls, analysis, datasets, or taxonomy notes that informed this spec. ...
  • 1. Executive Summary

  • 2. Goals and Non-Goals

  • 2.1 Goals

  • 2.2 Non-Goals

  • 3. System Overview

  • 3.1 Block Diagram

  • 4. Requirements

  • 4.1 Functional Requirements

  • 4.2 Electrical Requirements

  • 4.3 Environmental and Reliability Requirements

  • 5. Constraints

  • 5.1 Mechanical Constraints

  • 5.2 Power and Thermal Constraints

  • 5.3 Layout / Implementation Constraints

  • 5.4 Cost and Sourcing Constraints

  • 6. Assumptions and Dependencies

  • 7. Validation Criteria

  • 7.1 Acceptance Tests

  • 7.2 Review Checklist

  • Appendix (Optional)

Assets

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