Light sensor broken on auto anchor light

[BlueChip]

My automatic anchor light has broken after I dropped it.

The lamp is now permanently on. If i short the two flying leads on the light sensor the lamp goes off and if I shine a bright light very close to the sensor the lamp also goes off.
So it looks like the light sensor resistor is faulty.
Amazon sell these sensors cheaply, this one looks like it but I need one with the opposite reaction, ie low resistance in daylight to turn the anchor lamp off
https://www.amazon.co.uk/Quality-De..._rd_t=40701&psc=1&refRID=S5XVQV47KKAAXQEKVJNT

Any suggestions?

 

[Graham376]

Mine went faulty recently, turned out to be a dry solder joint on the cell.

 

[earlybird]

but I one with the opposite reaction, ie low resistance in daylight to turn the anchor lamp off
https://www.amazon.co.uk/Quality-De..._rd_t=40701&psc=1&refRID=S5XVQV47KKAAXQEKVJNT

Any suggestions?

Are you sure of this? Have you measured the original component?

 

[elton]

My automatic anchor light has broken after I dropped it.

The lamp is now permanently on. If i short the two flying leads on the light sensor the lamp goes off and if I shine a bright light very close to the sensor the lamp also goes off.
So it looks like the light sensor resistor is faulty.
Amazon sell these sensors cheaply, this one looks like it but I one with the opposite reaction, ie low resistance in daylight to turn the anchor lamp off
https://www.amazon.co.uk/Quality-De..._rd_t=40701&psc=1&refRID=S5XVQV47KKAAXQEKVJNT

Any suggestions?

Can you see the part number on the sensor? If so there are very few types, and most are readily available. If not you can Google the specification and buy an equivalent elsewhere.

 

[BlueChip]

Are you sure of this? Have you measured the original component?

No, but shorting the sensor out turns the light off

 

[BlueChip]

Can you see the part number on the sensor? If so there are very few types, and most are readily available. If not you can Google the specification and buy an equivalent elsewhere.

No p/n on the sensor

 

[rogerthebodger]

My automatic anchor light has broken after I dropped it.

The lamp is now permanently on. If i short the two flying leads on the light sensor the lamp goes off and if I shine a bright light very close to the sensor the lamp also goes off.
So it looks like the light sensor resistor is faulty.
Amazon sell these sensors cheaply, this one looks like it but I need one with the opposite reaction, ie low resistance in daylight to turn the anchor lamp off
https://www.amazon.co.uk/Quality-De..._rd_t=40701&psc=1&refRID=S5XVQV47KKAAXQEKVJNT

Any suggestions?

Remove it from circuit and measure the dark resistance and the light resistance then compare with the one you posted.

 

[LittleSister]

My first auto anchor light failed (possibly the result of being dropped, I'm not sure). The result was it would flicker, because the sensor was picking up the light from the lamp itself. I prised it open and found the sensor had bent/fallen out of position. I bent it back to where I imagined it should be, and its been fine ever since. Could yours perhaps have been displaced so that it doesn't pick up the external light sufficiently?