Questions tagged [photoresistor]
Light sensitive resistors whose resistance decreases with the amount of light they receive.
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Photoresistor Matrix has the same values
I'm a second-year System Engineer student who needs to make a project for class.
I have a 4x4 matrix of photoresistors that goes to an analog digital multiplexer connected to an Arduino Uno. This ...
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Apparently the photoresistors don't pass the input at the leds
I am making a school project where i need to create a parking loot in tinkercad. Me and my mate tried to use a bunch of photoresistor that worked as a sensor. No light = car = red led; light = no car =...
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What resistor should I use when using a photo-resistor?
So I'm trying to use a photo-resistor and I learned that you should have a "fixed" resistor in the circuit. So my question is, what resistor should I have be the fixed resistor? My photo-...
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How to make ultrasonic and light sensors detect whether a person moving in or out [closed]
I am trying to make a circuit that will be used for turning on a light whenever there are 1 or more people in a room. I need to add to a variable counter when someone enters and subtract when someone ...
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Arduino code not working properly (Please Help)
I am having some trouble getting my board to perform the function I want it to perform. This is a project I have due in a few days, and I have hit a wall I just can't seem to get past. Now, I will say ...
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Count specific range of output as 1 single output
The LDR sensor gives a range of values to show whether a LED is OFF/ON, let's say above LDR range 400, the led is ON. When a LED is ON, after reading the sensor values it shows above LDR range 800, ...
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Photoresistor help
I'm a newcomer to Arduino, trying to read analog values from a circuit with a photoresistor. I believe I am using a 1-ohm resistor
The problem I am having is that my photoresistor does not seem to be ...
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I am very new to Arduino and the kit tutorial just told me to wire this, I do not know how to wire it. Can Someone plz help!
I can't figure out how to do this the only wires I have are Jumper Wire and M-F 20 Pin DuPont Wire.
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Measuring car speed between two points: What sensor to use and how to cover the distance?
PROBLEM
Cars regularly exceed the speed limit in our street
SOLUTION
Measure each car's speed and clearly display the speed to the driver
EXECUTION
Measure the time the car takes to cover a set ...
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Arduino acting strange with photoresistor data
So I stumbled into strange problem. I have this circuit, where I connect 2 photoresistors and bluetooth HC05 to Arduino. When one of the resistors senses bright light bluetooth sends '1' or '3' ...
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Do we have to calibrate LDR before using it in a project?
I am doing a project with Arduino, making a synthesizer, in which an LDR is used.
Before connecting the Arduino to a power source and use the project, do I need to calibrate the LDR like it is ...
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Time counting using millis
I am trying to write a code where photoresistors (a or b) sense blinking of the light, and lights LED (k and d) simultaneosly with that blinking. And I want that when both photoresistors sense dark ...
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Using a photo resistor to detect objects of a certain color
I am trying to build a robot that detects cubes of a certain color, and later picks them up.
I was planning to use a camera and process the image, but I was told that Arduino is not capable of image ...
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Detect a camera flash? Light sensor, photoresistor?
I'm looking to build an Arduino-based "camera flash logger" to detect when a camera flash goes off, and maintain a log of those events. My thinking is to use a photoresistor to measure light level, ...
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Measuring lenght of time light levels peak using photoresistor
I'm trying to measure shutter speeds on old cameras. This essentially consists of:
Shining a torch at one end of the camera
putting the photoresistor at the other end
trigger the shutter which ...
