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Das Elektroniker-Forum • Thema anzeigen - Einfache IR Näherungssensor

Einfache IR Näherungssensor

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Moderator: dussel07

Einfache IR Näherungssensor

Beitragvon Busted Dice » 30.10.2017, 11:35

Hallo möchte einen einfachen IR Näherungssensor erstellen.
Leider macht die Schaltung noch nicht genau das was ich möchte.
Die LED soll beim entfernen des Covers an gehen und beim annähern aus gehen.
Im Moment mach die Schaltung aber genau das gegenteil.
Hat eventuell jemand eine Ahnung wie ich das am besten umsätze??


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Re: Einfache IR Näherungssensor

Beitragvon alterhase » 30.10.2017, 18:05

Löten verbindet ...manchmals. :mrgreen:
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Re: Einfache IR Näherungssensor

Beitragvon Busted Dice » 04.11.2017, 05:18

Okay werde das mit den Schmitttrigger-Inverter mal ausprobieren.
Das ist die momentane Schaltung.

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Re: Einfache IR Näherungssensor

Beitragvon alterhase » 04.11.2017, 09:23

So stelle ich mir den Eingangsteil vor:
Eingangsbeschaltung.GIF
Eingangsbeschaltung.GIF (1.65 KiB) 1448-mal betrachtet
Löten verbindet ...manchmals. :mrgreen:
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Re: Einfache IR Näherungssensor

Beitragvon topas » 04.11.2017, 12:00

Ob man alternativ den ersten Transistor des Schmitttriggers auch durch den Phototransistor ersetzen kann?
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Re: Einfache IR Näherungssensor

Beitragvon alterhase » 04.11.2017, 12:50

Löten verbindet ...manchmals. :mrgreen:
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Re: Einfache IR Näherungssensor

Beitragvon Busted Dice » 20.11.2017, 15:24

Würde es auch so ein Schmitt-Trigger tun? Und wie müste ich die Schaltung anpassen so das sie als Näherungsschalter funktioniert?
schaltplan_schmitt_trigger_schaltung_mit_transistor.gif
schaltplan_schmitt_trigger_schaltung_mit_transistor.gif (3.71 KiB) 1340-mal betrachtet
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Re: Einfache IR Näherungssensor

Beitragvon alterhase » 20.11.2017, 15:36

Schaltung vom 4.11.17 statt dem Poti und falls gewünscht, die LED1 in Serie zu R5. IR-LED wie gehabt.
Löten verbindet ...manchmals. :mrgreen:
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Re: Einfache IR Näherungssensor

Beitragvon Busted Dice » 20.11.2017, 17:41

Okay danke für die Hilfe ;)
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