At89c2051 Projects [better] Jun 2026

The AT89C2051 might be "old school," but it is a powerhouse for learning the fundamentals of embedded logic. Start with the binary counter, master the multiplexing of the digital clock, and soon you'll find yourself designing custom controllers for almost anything.

P1 |= 0x03; // disable digital input on P1.0/P1.1 CMOD = 0x00; CON = 0x00; // no interrupt while(1) if(CON & 0x20) // comparator output P3_6 = 1; else P3_6 = 0; at89c2051 projects