Long time timing control circuit (3)
Source: InternetPublisher:aerobotics Keywords: control circuit switch BCD Updated: 2021/05/21
Circuit working principle: The timing time can be programmed by step T, and T
is determined by the time constant R1(C5 +C6) =15 min. BCD switch can select timing time up to 225T
. The timer function is controlled by an internal trigger and switches S1, S2. To keep the time
accurate, C5 and C6 must be chosen carefully.
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