APPARATUS FOR GENERATING THE PRINT SIGNAL

摘要

a printer connector(20) outputting the content stored in a computer(10); a re-triggerable unistable multi-vibrator(30) detecting the output of a strobe signal and beig connected to the strobe signal outputting terminal of the printer connector(20); a R-S latch circuit(50) connected to the output terminal of the re-triggerable unistable multi-vibrator(30) through a condenser(C1) and a resistor(R1); and a transistor(Q1) which controls the driving of a buzzer(40), being connected to the output terminal of the R-S latch circuit(50).