2 layers30.5 × 22.9 mm
Ir project
hitendravalhe/IR_sensor_pcb_design
This repository contains the design files and documentation for an Infrared (IR) sensor PCB with an integrated LM35 temperature sensor.
9 parts1
2 layers
IR sensor
Heman-hk/IR-Sensor-PCB-DesignThis project implements a simple Infrared (IR) proximity sensor using an IR LED, photodiode, and an LM358 operational amplifier configured as a voltage comparator.
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 9
- Nets
- 7
- Pads
- 22
- Tracks, vias
- 40, 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 9 Jul 2025
- Updated
- 9 Jul 2025
Overview
IR sensor is an open-source printed circuit board by Heman-hk, from the Heman-hk/IR-Sensor-PCB-Design repository on GitHub. It is a 2-layer board with 9 parts on 7 nets, routed with 40 tracks and 3 vias.
It is built around the LM358 and IR204-A-L. Its parts include 3 resistors, 3 diodes, 1 IC and 1 connector. It belongs with the sensors and measurement boards of this library.
Main components
2README
README.mdIR Sensor Module – LM358 Based
This project implements a simple Infrared (IR) proximity sensor using an IR LED, photodiode, and an LM358 operational amplifier configured as a voltage comparator. Designed for object detection tasks, the circuit generates a digital output when IR light is reflected from a nearby surface.
Circuit Description
- IR LED emits infrared light continuously.
- Photodiode receives reflected IR light and generates a corresponding voltage signal.
- LM358 Op-Amp compares the photodiode signal with an adjustable reference voltage (set by RV1).
- Output Pin (0/P) goes HIGH when an object is detected (voltage crosses the threshold).
Components
| Component | Description |
|---|---|
| IR LED | Infrared emitter for sensing |
| Photodiode | Reflective light detector |
| LM358 | Dual Op-Amp IC used in comparator mode |
| Resistors | R1, R2, R3 to set gain and bias |
| Potentiometer (RV1) | Sensitivity threshold adjust |
| Output Pin | Digital signal when object is detected |
Applications
- Obstacle detection for robotics
- Line-following robot modules
- Hand gesture triggers
- Proximity detection for automation
Notes
- Adjust RV1 for optimal sensitivity under ambient lighting
- Ensure IR LED and photodiode are mounted parallel to detect reflected light
- Output can be interfaced directly with microcontrollers (e.g., ESP32, Arduino)
Designed By
Himanshu Kumar
Embedded Systems & Circuit Design Enthusiast
Parts
9| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 0.1K | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 0.33K | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 10K | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 10K | Potentiometer_SMD:Potentiometer_Bourns_TC33X_Vertical | RV1 |
| 1 | Conn_01x03_Pin | Connector_PinSocket_1.27mm:PinSocket_1x03_P1.27mm_Vertical | J1 |
| 1 | D_Photo | Diode_SMD:D_SOD-123 | D1 |
| 1 | IR204A | LED_SMD:LED_1206_3216Metric | D2 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | LM358 | Package_SO:SOIC-4_4.55x2.6mm_P1.27mm | U1 |
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Questions
What parts does the IR sensor use?
9 parts, built around the LM358 and IR204-A-L. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the IR sensor KiCad files?
From the Heman-hk/IR-Sensor-PCB-Design repository on GitHub, at the commit this page was made from: the board is IR_sensor.kicad_pcb and its schematic IR_sensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the IR sensor design in my own project?
Its repository states no licence, so its author keeps all rights: ask Heman-hk before reusing the design.