| 摘要 |
PURPOSE:To stop automatically the input state of train pulses when a prescribed number of train pulses is inputted, by inputting train pulses continuously to the counter and by detecting the output state of the counter to control it. CONSTITUTION:Train pulses TP are generated from pulse generating circuit 2 and are inputted to counter 3. Counter 3 counts the number of pulses and encodes it and sends it to matrix circuit 4. Circuit 4 outputs the output on the basis of the output of counter 3 to drive indicator lamps 5l-5m successively; and the counter becomes a prescribed output state, transistor 14 of detecting circuit 6 becomes conductive to reset FF16 of control circuit 7 through inverter 15. As a result, TP from circuit 2 is stopped, and confirmation indicating lamp 20 is lighted. In case that the output state of counter 3 is to be shifted successively by a prescribed number, pulse generator 9 is operated manually to set the number. |
