How do you check if a photocell is working?
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In respect to this, how do you know if your photocell is bad?
Check the cable for shorts, nicks, or a ground loop. If the photocell still does not function, measure continuity on the photocell wire (red/blue for 2-wire photocell or red/blue/green for 3-wire photocell) and check if it is shorted. If a short is found, the photocell is bad and needs to be replaced.
Subsequently, question is, do photocells wear out? Photocells are sensors that allow you to detect light. They are small, inexpensive, low-power, easy to use and don't wear out.
Also know, how does a photocell work?
A photocell is a resistor that changes resistance depending on the amount of light incident on it. A photocell operates on semiconductor photoconductivity: the energy of photons hitting the semiconductor frees electrons to flow, decreasing the resistance.
How long does a photocell last?