This is a design circuit that can be used to create a detection system with reference to the source of light energy. This circuit is based on BP103. This is a Silicon NPN phototransistor circuits used to control and training, industrial electronics, forks, and controlled by a computer flashes with its features such as high linearity, suitable for applications from 420N to 1130nm and packaged into the motherboard 18-lens transparent epoxy resin in combination with Database. This is the figure of the circuit.
During the operation, the circuit is producing low power, which is enough light detectors receives light. Even in the darkness, the light source can also be made from a variety of ways. Compatibility between the outputs of a TTL level logic produces a low level. This occurs because the light is detected by phototransistor Q1 BP103. This model of the transistor is manufactured by Siemens. Phototransistor has a photodiode with internal gain and nothing more than a bipolar transistor in a transparent case so that the base-collector junction can be achieved by light. Photons base-collector junction produce electrons can be injected into the base. The current gain transistor amplifies the photodiode current.
During the operation, the circuit is producing low power, which is enough light detectors receives light. Even in the darkness, the light source can also be made from a variety of ways. Compatibility between the outputs of a TTL level logic produces a low level. This occurs because the light is detected by phototransistor Q1 BP103. This model of the transistor is manufactured by Siemens. Phototransistor has a photodiode with internal gain and nothing more than a bipolar transistor in a transparent case so that the base-collector junction can be achieved by light. Photons base-collector junction produce electrons can be injected into the base. The current gain transistor amplifies the photodiode current.
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