1 hour LM122 timer circuit


Posted on Mar 28, 2007

As shown in Figure 1 hour using a LM122 timer circuit. Start of the circuit, reset and stop halfway, etc. are converted by the switching operation. Figure, S1 to start timing when the timer is started, then this switch has no effect. S2 is centrally located in


1 hour LM122 timer circuit
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the "off" switch, the timer can switch through the conversion is completed: Charge - open - discharge. Since midway stop charging, even if not to the timer set time, the charging station will return to work status timer output lines. When the C discharge, R / C terminal voltage is zero, the discharge position waiting for start signal S1. Even if the recovery position. Work status timer output line does not change, therefore, the timer is reset when the work which the state remains the same output line, in this moment, C starts charging again, start a timer to change working hours.




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