| 摘要 |
PURPOSE:To set a striking time optionally and easily through simple constitution by storing whether time-signal is performed or not for every regular time, and controlling the generation of a time-striking sound. CONSTITUTION:When a switch S2 is closed, a flip-flop F3 is reset and a low- level Q output becomes a time-signal inhibiting signal. At the same time, a flip- flop F5 is set and a monostable multivibrator W3 is triggered to impress a write command to a storage circuit M while controlling a multiplexer MP. Then, the counted value A of a duodecimal counter CT3 driven in response to the switch S2 and the forenoon signal of a flip-flop F4 driven by the flow signal of the counter CT3 are passed through a decoder DE to generate an address, writing the time-signal inhibiting signal in the address of AM one o'clock of the circuit M. The switch S2 is operated again to write the time-signal inhibiting signal in the addresses of AM two o'clock, three o'clock-. A time-striking permitting signal for every regular time is written similarly by operating a switch S1. Thus, a regular striking time is set optionally easily through the simple constitution. |
