1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

Photoresistor Issue In Water Filter

Discussion in 'Repairing Electronics' started by Johnson007, May 20, 2017.

  1. Johnson007

    Johnson007 New Member

    Joined:
    May 20, 2017
    Messages:
    1
    Likes:
    0
    Guys i have 2 UV water filter of same model . one had stopped working so i opened it up and found a photoresistor i believe was faulty so i removed the photoresistor and shorted the wire together and it started functioning again...so i am sure of the culprit... I believe it job was to keep a check on the uv light if it is blown or not.
    i replace it with a new photoresistor that i had & when i check the terminal with the switch on .It showed 1k ohms ..so i believe it is not allowing the current to flow.

    and on my other filter which is functioning properly it shows 0 ohms on on state.

    I have no idea if photoresistors has values to it (like transistor & resistor has) & why this photoresistor has metal casing to it.

    To understand the problem better can look at the screenshot attached.
    Any push in proper direction would be helpful.

    Attached it the picture of the photoresistors .
     

    Attached Files:

  2. Colin

    Colin Member

    Joined:
    Sep 25, 2003
    Messages:
    374
    Likes:
    22
    Location:
    Australia
    Try the LDR from the other unit.
     
  3. alec_t

    alec_t Well-Known Member Most Helpful Member

    Joined:
    Jul 10, 2011
    Messages:
    9,259
    Likes:
    1,218
    Location:
    Cardiff, Wales
    Although CdS LDR cells are available in various styles and with various dark/light resistances, I'm surprised you measured 0Ω. Are you sure the cell hasn't been bypassed somehow?
     

Share This Page