The basic characteristics of the photocell were tested and analysed through experiments by an optical control experimental platform, such as short circuit current, open circuit voltage, illumination characteristic, volt ampere characteristic, load characteristic, and spectral characteristic.
The spectral response of a photocell refers to its sensitivity to different wavelengths or colors of light. Different types of photocells have varying degrees of sensitivity across the electromagnetic spectrum, with some being more responsive to specific colors of light than others.
The cell which is used in the photocell circuit is called a transistor switched circuit. The essential elements necessary for the construction of a photocell circuit are: The circuit of the photocell operates in two scenarios which are dark and light.
A photocell has also been termed a sensor that can be utilized for the purpose of sensing light. The crucial characteristics of photocell sensors are uncomplicated usage, requires minimal power for operation, minimal size, and economical too.
Photocells are also called by many other names including photoconductive cells, light-dependent resistors (LDR's), and photoresistors. They are variable resistors with an extremely wide range of resistance values (up to hundreds of orders of magnitude) that are dependent on the level of incident light.
A few devices, notably some silicon photodiodes, have their peak sensitivity for the same colour as the peak sensitivity of the human eye. The main classes of photocells are photoresistors, photovoltaic materials, and photoemitters. Kevin M. Lynch, ... Matthew L. Elwin, in Embedded Computing in C with the PIC32 Microcontroller, 2016