The LM393 LDR Light Sensor Module detects light and dark using a light-dependent resistor and LM393 comparator. When light falls below the set level, the digital output changes – making automatic night lamps and light-based switches very easy.
| Sensor | LDR (photoresistor) |
|---|---|
| Comparator | LM393 |
| Supply voltage | 3.3V – 5V |
| Output | Digital (DO); analog (AO) on 4-pin version |
| Adjustment | Potentiometer for light threshold |
What is the operating voltage?
3.3V – 5V.
Can it measure lux?
No, it gives light/dark level. For lux use the BH1750 sensor.
Can I buy the LM393 Photosensitive Light-Dependent Control Sensor LDR Module in Kanpur?
Yes – buy online with delivery across India, or pick it up from the iTechBuilders store, Damodar Nagar, Kanpur.
