Difference between revisions of "LDR"
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(Created page with "= Description = Text Image(s) = How to connect it electrically = Text Image(s) = How to control it in MicroPython = <syntaxhighlight lang="python" line='line'> # todo #...") |
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= Description = | = Description = | ||
| − | + | An LDR is a light-dependent resistor. It changes it's resistance depending on the light falling onto the LDR. | |
| − | + | [[File:Ldr01.PNG|200px]] | |
| + | = How to connect it electrically = | ||
| + | Connecting the light dependent resistor (LDR). The value you read is dependent on how bright it is. | ||
| − | + | [[File:Rldr.JPG|300px]] | |
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| − | |||
= How to control it in MicroPython = | = How to control it in MicroPython = | ||
| − | + | 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'> | <syntaxhighlight lang="python" line='line'> | ||
| − | # | + | #Example usage for ESP32 |
| − | + | from machine import Pin, ADC | |
| − | + | from time import sleep | |
| − | + | analogPin = ADC(Pin(34)) | |
| + | analogPin.atten(ADC.ATTN_11DB) | ||
| − | + | while True: | |
| + | analogVal = analogPin.read() | ||
| + | print(analogVal) | ||
| + | sleep(1) | ||
| + | </syntaxhighlight> | ||
= Related Tutorial Videos = | = Related Tutorial Videos = | ||
| − | + | <youtube>gjj5KyK2qGI</youtube> | |
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| − | <youtube> | ||
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Latest revision as of 00:26, 30 August 2020
Contents
Description[edit]
An LDR is a light-dependent resistor. It changes it's resistance depending on the light falling onto the LDR.
How to connect it electrically[edit]
Connecting the light dependent resistor (LDR). The value you read is dependent on how bright it is.
How to control it in MicroPython[edit]
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.
1 #Example usage for ESP32
2 from machine import Pin, ADC
3 from time import sleep
4
5 analogPin = ADC(Pin(34))
6 analogPin.atten(ADC.ATTN_11DB)
7
8 while True:
9 analogVal = analogPin.read()
10 print(analogVal)
11 sleep(1)
Related Tutorial Videos[edit]
