# Plant Light Level PAR Meter

A photosynthetically active radiation meter for plant growers. The 80x60x30mm handheld device measures PAR (400-700nm) in µmol/m²/s. Essential for optimizing grow lights and plant placement. OLED display shows real-time reading and daily light integral. Data logging for plant experiments. This light meter plants project is perfect for makers, DIY enthusiasts, and electronics hobbyists. Search volume: 880/month.

#### ESP32-S3 Module

Espressif Systems  
×1  
`ESP32-S3-MINI-1-N8`compute  
Why: Main microcontroller for processing light measurements, controlling display, managing data logging, and providing real-time calculations for PAR and daily light integral

#### Ambient Light Sensor

Broadcom Limited  
×1  
`APDS-9306-065`sensing  
Why: Light sensor for measuring PAR (photosynthetically active radiation) in the 400-700nm range as required for the primary function

#### OLED Display Module

Orient Display  
×1  
`AOM12864A0-0.96WW`user_input  
Why: 0.96 inch OLED display for showing real-time PAR readings, daily light integral values, and logged data as required

#### 18650 Battery Holder

MPD (Memory Protection Devices)  
×1  
`BK-18650-PC4`power_regulation  
Why: Battery holder for portable handheld operation as specified in constraints

#### 3.3V Linear Regulator

Shenzhen Slkormicro Semicon Co., Ltd.  
×1  
`AMS1117-3.3 SOT-223`power_regulation  
Why: Voltage regulator to convert 3.7V battery voltage to stable 3.3V for MCU, sensor, and display operation

#### Power Switch

C&K  
×1  
`OS102011MS2QN1`power_regulation  
Why: On/off switch for handheld device power control

|  | Part | Why | MPN | Qty |
| --- | --- | --- | --- | --- |
|  | ESP32-S3 Module<br>Espressif Systems | Main microcontroller for processing light measurements, controlling display, managing data logging, and providing real-time calculations for PAR and daily light integral | `ESP32-S3-MINI-1-N8` | 1 |
|  | Ambient Light Sensor<br>Broadcom Limited | Light sensor for measuring PAR (photosynthetically active radiation) in the 400-700nm range as required for the primary function | `APDS-9306-065` | 1 |
|  | OLED Display Module<br>Orient Display | 0.96 inch OLED display for showing real-time PAR readings, daily light integral values, and logged data as required | `AOM12864A0-0.96WW` | 1 |
|  | 18650 Battery Holder<br>MPD (Memory Protection Devices) | Battery holder for portable handheld operation as specified in constraints | `BK-18650-PC4` | 1 |
|  | 3.3V Linear Regulator<br>Shenzhen Slkormicro Semicon Co., Ltd. | Voltage regulator to convert 3.7V battery voltage to stable 3.3V for MCU, sensor, and display operation | `AMS1117-3.3 SOT-223` | 1 |
|  | Power Switch<br>C&K | On/off switch for handheld device power control | `OS102011MS2QN1` | 1 |

6 unique parts, 6 total components