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| = Description =
| | #REDIRECT [[Light-Dependent Resistors]] |
| An LDR is a light-dependent resistor. It changes it's resistance depending on the light falling onto the LDR.
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| [[File:Ldr01.PNG|200px]] | |
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| = How to connect it electrically =
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| Connecting the light dependent resistor (LDR). The value you read is dependent on how bright it is.
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| [[File:Rldr.JPG|300px]]
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| = How to control it in MicroPython =
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| This makes Pin 34 an analog input and set it to 12 bit. It reads the analog value every second and print it to the console.
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| <syntaxhighlight lang="python" line='line'>
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| #Example usage for ESP32
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| from machine import Pin, ADC
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| from time import sleep
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| analogPin = ADC(Pin(34))
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| analogPin.atten(ADC.ATTN_11DB)
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| while True:
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| analogVal = analogPin.read()
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| print(analogVal)
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| sleep(1)
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| </syntaxhighlight>
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| == Code Example Arduino Nano Connect RP2040 ==
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| A0 is the analog input with 16 bit resolution. It reads the analog value every second and print it to the console-
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| <syntaxhighlight lang="python" line='line'>
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| #Example usage for Arduino Nano
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| from machine import Pin, ADC
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| from time import sleep
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| analogPin = ADC(Pin(26))
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| while True:
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| analogVal16 = analogPin.read_u16()
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| print(analogVal16)
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| sleep(1)
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| </syntaxhighlight>
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| = Related Tutorial Videos =
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| <youtube>gjj5KyK2qGI</youtube>
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