Display 7 Segment 4 Digit Multiplex

Sunday, March 19th, 2017 - Electronic Hobby

Viewer or use the 7 segment display in applications of electronic devices is a microcontroller or a drain port data path that would in the show, especially when the data would show more than one digit. point is required to control the resources of each segment and lanes 7 to input data on a 7 segment. The series of 7 Segment 4 Digit Display this Multiplex is a way to save microcontroller ports or data paths that will be displayed. Display circuit 7 Segment 4 Digit Multiplex using BCD to 7 segment decoder 74LS247 BCD to encode the data from the data that will be displayed, and then to the resources of each viewer 7 segment using a transistor that is set as an electronic switch. The current flowing in the circuit segment viewer 7 7 Segment 4 Digit Display this Multiplex in the limit using yag resistor in series pairs at each collector transistor.

The circuit of Display 7 Segment 4 Digit Multiplex

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Legs LT, RBI, RBO at this circuit is not connected (logic high) is meant to display data from seven segment according to data from the microcontroller. Resistor in series to the LED is used as a current limiter so that the current flowing through the LED current does not exceed the maximum allowed is equal to 20 mA.

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