Transistor time relay circuit

Five of the transistor time relay circuit b (a) for the exchange of time relay, Figure (b) is a linear flow of time following, the use of only two different power supply,

the circuit is the same. Adjust the potentiometer can change the delay time. Time delay element JsJ transistor relay parameters listed in Table 12-1. Delay error: 1-50s when the soil 3%; 2-5min when 6%.

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