Introduction - If you have any usage issues, please Google them yourself
A single chip lit 8 light-emitting diode experiment
1 (P1) 8 common cathode light-emitting diodes, light up to a high of 4
2) P0 port to connect 8 common anode light-emitting diodes, light up to 4 bits
3) P0 port to connect 8 common cathode light-emitting diodes, light up to 4