Description
ADIY Light Dependent Resistor – LM393 LDR’s resistance is very high in the darkness, almost as high as 1MΩ but when there is the light that falls on the LDR, the resistance falls down to a few K (10-20KΩ @ 10 lux, 2-4K @ 100 lux) depending on the model.
The module produces an output voltage according to the resistance of the LDR and is made available at Analog Output (AO) pin. The same signal is fed to an LM393 High Precision Comparator to digitize it and is made available at a Digital Output (DO) pin. The module has a built-in potentiometer for sensitivity adjustment of the digital output (DO).
You can set a threshold by using a potentiometer; So that when the incident light level on the LDR exceeds the threshold value, the module will output LOW otherwise HIGH.Apart from this, the module has two LEDs. The Power LED will light up when the module is powered. The Status LED will light up when the digital output goes LOW.
Features: ADIY LDR Module
- LM393-based design.
- It can detect ambient brightness and light intensity.
- Adjustable sensitivity (via blue digital potentiometer adjustment).
- Output Digital – 0V to 5V, Adjustable trigger level from preset.
- LEDs indicating output and power.
- Mounting hole
- Power and Signal indicator LED
- Analog and Digital Out
- Adjustable threshold (via potentiometer)
- Input Voltage (V): 3.3 to 5
Package Includes :
- 1 x LDR Module.
Resources
- Usage Guide (Check “The Module” section)
- LM393, Dual Comparators datasheet
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