More than a key to switch the program (em78p153spj) circuit structure: P1 port access 8 LED (low enable) P3.3 port access to the keyboard (take off) program features: can achieve the six kinds of one-touch function All keys occupy less than 1 second. 1 second click, a lights off 1 second double, two bright lights button three times within 1 sec, 3 lights lit long by 1 second and 4 lights lit click lengthened by 1 second, 5 lights light 1 second longer second click Press, 6 lights bright program to work correctly, the 8 lights flashing (2HZ)

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