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AVT1476 twilight sensor - which resistor shifts switching threshold darker?

gkmaster 6651 3
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  • #1 11747077
    gkmaster
    Level 17  
    Posts: 405
    Help: 5
    Rate: 106
    Hello
    I have a circuit AVT1476 you are the whole description AVT1476 - the problem is that the circuit is switching on too early - that is, it is still relatively light and the circuit is already switching on. Adjusting the PR no longer helps because it is in the extreme position - the question now is which resistor to increase/decrease to make the circuit switch on when it is already very dark.

    AVT1476 twilight sensor - which resistor shifts switching threshold darker?
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    #2 11747177
    Mleczyk89
    Level 34  
    Posts: 2087
    Help: 291
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    Increase the PR-ke or add a resistor in series with it.
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    #3 11747611
    Zygaqra
    Level 35  
    Posts: 2234
    Help: 257
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    On photo resistance, it is difficult to set the switch-on in complete darkness. The photosensitive elements already have practically maximum resistance in grey.
  • #4 11758662
    gkmaster
    Level 17  
    Posts: 405
    Help: 5
    Rate: 106
    Increasing the resistance by adding a 3.3k resistor in series helped. I also have a question about the hysteresis - resistor R3 is responsible for it - so if I want to reduce the hysteresis range I should increase its value?
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