This project involves designing and constructing a PCB that allows for the control of a 7-segment display using 74LS47 and 74LS48 decoders. The innovative feature of this design is its flexibility, allowing the use of both common-anode and common-cathode displays by simply configuring the DIS pin header. This makes the PCB adaptable to different types of displays without requiring physical changes to the circuit.

Main Components:

7-Segment Display: Used to show numbers and some characters. It can be common-anode or common-cathode.

74LS47/74LS48 Decoders:

74LS47: BCD to 7-segment decoder for common-anode displays.

74LS48: BCD to 7-segment decoder for common-cathode displays.

Pin Headers (DIS): Allow for configuring the PCB to work with the type of display connected.

Sockets: Facilitate the insertion and removal of integrated circuits without the need for soldering.

Power Supply: Provides the necessary voltage for the circuit's operation.

Protection Resistors: Prevent overheating of the display segments.

Operation:

BCD Inputs: The PCB receives a BCD (Binary-Coded Decimal) value through inputs connected to the 74LS47 or 74LS48 decoder.

Decoding: The decoder converts the BCD input into the signals needed to activate the segments of the 7-segment display. Depending on whether the display is common-anode or common-cathode, the 74LS47 or 74LS48 decoder is used.

DIS Pin Header Configuration:

Common-Anode: If using a common-anode display, configure the DIS pin header to activate the 74LS47 decoder.

Common-Cathode: If using a common-cathode display, configure the DIS pin header to activate the 74LS48 decoder.

Segment Connections: The decoder's outputs are connected to the segments of the display. Each segment (a, b, c, d, e, f, g) is activated according to the received BCD value, displaying the corresponding number on the display.