| 摘要 |
The number board (1) of clock with numbers randomly arranged sets a clock by the hour, minute and secodn on digital display (OP)(MP) (SP). The hands (2)(3)(4) on the number board (1) are mounted to a stepping motor (M1)(M2)(M3) for driving respective hands. The drive circuit of the clock comprises a hour hand drive circuit, a minute hand drive circuit and a second hand drive circuit, they are connected to OR-gate (OR1g9having a start button (B4) and an oscillator (OSC).
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