I'm a total newbie at this, but I have a photoresistor set up so that it controls the shorting on an audio circuit. When light is on, it shorts and cuts the sound. When it is dark, it closes and al...

I mean, photoresistor is already a resistor, why do we have to decrease the voltage in the circuit with an additional resistor? Thanks in advance for your answers.

Dec 14, 2010 · Tie your photoresistor from the positive side of the power supply to the wiper on the variable resistor. That way the variable resistor will change both the charge time and the …

Nov 8, 2020 · I just set up a cheap photoresistor from a starting kit in a voltage divider circuit with a 10 K resistor and sent the registered pin voltage to a computer using USB. The first figure …

Oct 15, 2020 · A photoresistor's sensitivity is a byproduct of the chemical used to create it. This one, a CdS cell, peaks around 545 nm wavelength, which means it is much more sensitive …

10 You need the LED to be lit when the photoresistor is high resistance. So replace the photoresistor with a fixed resistor R3, to supply the base current to turn the transistor on. Then …

Sep 30, 2017 · The GL5506 has a significantly lower resistance for a given amount of light compared to the GL5516 AND, in dark conditions the resistance of the GL5516 is significantly …

Oct 1, 2015 · I'm doing a school project in which I need to measure the amount of light emitted by a specific object. The first thing that came to my mind was to use a photo resistor hooked up to …

Mar 31, 2016 · simulate this circuit – Schematic created using CircuitLab I have a photoresistor, R1, and as a voltage divider a fixed resistance, R2. There is a voltage of 5V …

Apr 1, 2018 · Without the fixed resistor, the 5V going into the photoresistor has nowhere to go other than the analog input pin, so you'd read 5V regardless of the light level. The variable …