use AT89S51 SCM P0 port of P0.0- P0.7 connected to a digital control Yam were a-h of the pen, digital tube connected to the public. The digital display tube cycle 0-9 figures, the time interval of 0.2 seconds.

Packet : 51622444并行口直接驱动led显示.rar filelist
并行口直接驱动LED显示.htm

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