This PCB uses the 7447 chip to decode a common-anode 7-segment display. Current-limiting resistors are included on the board. The input pins are DCBA (D is the MSB and A is the LSB) expecting a BCD value. ~LT is an active-low lamp test input signal. The decimal point is not connected on this PCB.
Pinout
Hardware
This PCB uses the 7447 chip to decode a common-anode 7-segment display with 220 ohm current-limiting resistors.
Schematic
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