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Time sharing timer circuit

Source: InternetPublisher:公子李 Keywords: timer circuit Updated: 2020/05/28

17. Time sharing<strong><strong>Timer circuit</strong>.gif

Circuit working principle: 1C, the clock circuit LM8365 has a secondary timing output, which is used to
trigger the RS flip-flop to control subsequent circuit work. IC z and thyristor form a time base circuit
to provide accurate 60 Hz timing pulses to the quartz clock circuit. The wiring of LM8365 is
basically the same as its conventional usage. By pressing the "time adjustment" and "fast adjustment" and "slow adjustment" keys
, it can run normally. When setting the timer, first press the "Display On"
button, and then press the "Quick Calibration" or "Slow Calibration" button to adjust the " Time On" time to
10:00 pm. By then lC. Pin 26 of IC3 will output a high level
, causing the RS flip-flop composed of IC3 and IC3 to flip and output a low level. After being inverted by IC3 , the transistor will be turned on,
the relay K will close, and the electrical appliance will be energized. Work, the green IED lights up to indicate the start of work.


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